From 0ece30dc7c0e34b4c5911969b8fa99c33c6d023c Mon Sep 17 00:00:00 2001
From: George Hazan <ghazan@miranda.im>
Date: Wed, 30 Nov 2022 17:48:47 +0300
Subject: Telegram: update for TDLIB

---
 .../Telegram/tdlib/td/test/message_entities.cpp    | 1652 ++++++++++++++++++--
 1 file changed, 1517 insertions(+), 135 deletions(-)

(limited to 'protocols/Telegram/tdlib/td/test/message_entities.cpp')

diff --git a/protocols/Telegram/tdlib/td/test/message_entities.cpp b/protocols/Telegram/tdlib/td/test/message_entities.cpp
index 473a87140a..9c62415579 100644
--- a/protocols/Telegram/tdlib/td/test/message_entities.cpp
+++ b/protocols/Telegram/tdlib/td/test/message_entities.cpp
@@ -1,28 +1,36 @@
 //
-// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
+#include "td/telegram/CustomEmojiId.h"
 #include "td/telegram/MessageEntity.h"
+#include "td/telegram/UserId.h"
 
+#include "td/utils/algorithm.h"
+#include "td/utils/common.h"
 #include "td/utils/format.h"
 #include "td/utils/logging.h"
+#include "td/utils/misc.h"
+#include "td/utils/Random.h"
+#include "td/utils/Slice.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/tests.h"
+#include "td/utils/utf8.h"
 
-REGISTER_TESTS(message_entities);
+#include <algorithm>
+#include <utility>
 
-using namespace td;
-
-static void check_mention(string str, std::vector<string> expected) {
-  auto result_slice = find_mentions(str);
-  std::vector<string> result;
+static void check_mention(const td::string &str, const td::vector<td::string> &expected) {
+  auto result_slice = td::find_mentions(str);
+  td::vector<td::string> result;
   for (auto &it : result_slice) {
     result.push_back(it.str());
   }
   if (result != expected) {
-    LOG(FATAL) << tag("text", str) << tag("got", format::as_array(result))
-               << tag("expected", format::as_array(expected));
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result))
+               << td::tag("expected", td::format::as_array(expected));
   }
 }
 
@@ -39,20 +47,21 @@ TEST(MessageEntities, mention) {
   check_mention("@abcdefghijklmnopqrstuvwxyz123456", {"@abcdefghijklmnopqrstuvwxyz123456"});
   check_mention("@abcdefghijklmnopqrstuvwxyz1234567", {});
   check_mention("нет@mention", {});
-  check_mention("@ya @gif @wiki @vid @bing @pic @bold @imdb @coub @like @vote @giff @cap ya cap @y @yar @bingg @bin",
-                {"@ya", "@gif", "@wiki", "@vid", "@bing", "@pic", "@bold", "@imdb", "@coub", "@like", "@vote", "@giff",
-                 "@cap", "@bingg"});
-};
-
-static void check_bot_command(string str, std::vector<string> expected) {
-  auto result_slice = find_bot_commands(str);
-  std::vector<string> result;
+  check_mention(
+      "@ya @gif @wiki @vid @bing @pic @bold @imdb @ImDb @coub @like @vote @giff @cap ya cap @y @yar @bingg @bin",
+      {"@gif", "@wiki", "@vid", "@bing", "@pic", "@bold", "@imdb", "@ImDb", "@coub", "@like", "@vote", "@giff",
+       "@bingg"});
+}
+
+static void check_bot_command(const td::string &str, const td::vector<td::string> &expected) {
+  auto result_slice = td::find_bot_commands(str);
+  td::vector<td::string> result;
   for (auto &it : result_slice) {
     result.push_back(it.str());
   }
   if (result != expected) {
-    LOG(FATAL) << tag("text", str) << tag("got", format::as_array(result))
-               << tag("expected", format::as_array(expected));
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result))
+               << td::tag("expected", td::format::as_array(expected));
   }
 }
 
@@ -68,15 +77,15 @@ TEST(MessageEntities, bot_command) {
   check_bot_command("/test/", {});
 }
 
-static void check_hashtag(string str, std::vector<string> expected) {
-  auto result_slice = find_hashtags(str);
-  std::vector<string> result;
+static void check_hashtag(const td::string &str, const td::vector<td::string> &expected) {
+  auto result_slice = td::find_hashtags(str);
+  td::vector<td::string> result;
   for (auto &it : result_slice) {
     result.push_back(it.str());
   }
   if (result != expected) {
-    LOG(FATAL) << tag("text", str) << tag("got", format::as_array(result))
-               << tag("expected", format::as_array(expected));
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result))
+               << td::tag("expected", td::format::as_array(expected));
   }
 }
 
@@ -95,29 +104,32 @@ TEST(MessageEntities, hashtag) {
   check_hashtag(" #123a ", {"#123a"});
   check_hashtag(" #a123 ", {"#a123"});
   check_hashtag(" #123a# ", {});
-  check_hashtag(" #" + string(300, '1'), {});
-  check_hashtag(" #" + string(256, '1'), {});
-  check_hashtag(" #" + string(256, '1') + "a ", {});
-  check_hashtag(" #" + string(255, '1') + "a", {"#" + string(255, '1') + "a"});
-  check_hashtag(" #" + string(255, '1') + "Я", {"#" + string(255, '1') + "Я"});
-  check_hashtag(" #" + string(255, '1') + "a" + string(255, 'b') + "# ", {});
+  check_hashtag(" #" + td::string(300, '1'), {});
+  check_hashtag(" #" + td::string(256, '1'), {});
+  check_hashtag(" #" + td::string(256, '1') + "a ", {});
+  check_hashtag(" #" + td::string(255, '1') + "a", {"#" + td::string(255, '1') + "a"});
+  check_hashtag(" #" + td::string(255, '1') + "Я", {"#" + td::string(255, '1') + "Я"});
+  check_hashtag(" #" + td::string(255, '1') + "a" + td::string(255, 'b') + "# ", {});
   check_hashtag("#a#b #c #d", {"#c", "#d"});
   check_hashtag("#test", {"#test"});
-  check_hashtag(u8"\U0001F604\U0001F604\U0001F604\U0001F604 \U0001F604\U0001F604\U0001F604#" + string(200, '1') +
-                    "ООО" + string(200, '2'),
-                {"#" + string(200, '1') + "ООО" + string(53, '2')});
+  check_hashtag("#te·st", {"#te·st"});
+  check_hashtag(u8"\U0001F604\U0001F604\U0001F604\U0001F604 \U0001F604\U0001F604\U0001F604#" + td::string(200, '1') +
+                    "ООО" + td::string(200, '2'),
+                {"#" + td::string(200, '1') + "ООО" + td::string(53, '2')});
   check_hashtag(u8"#a\u2122", {"#a"});
+  check_hashtag("#a൹", {"#a"});
+  check_hashtag("#aඁං෴ก฿", {"#aඁං෴ก"});
 }
 
-static void check_cashtag(string str, std::vector<string> expected) {
-  auto result_slice = find_cashtags(str);
-  std::vector<string> result;
+static void check_cashtag(const td::string &str, const td::vector<td::string> &expected) {
+  auto result_slice = td::find_cashtags(str);
+  td::vector<td::string> result;
   for (auto &it : result_slice) {
     result.push_back(it.str());
   }
   if (result != expected) {
-    LOG(FATAL) << tag("text", str) << tag("got", format::as_array(result))
-               << tag("expected", format::as_array(expected));
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result))
+               << td::tag("expected", td::format::as_array(expected));
   }
 }
 
@@ -133,8 +145,9 @@ TEST(MessageEntities, cashtag) {
   check_cashtag("$ab", {});
   check_cashtag("$abc", {});
   check_cashtag("$", {});
-  check_cashtag("$A", {});
-  check_cashtag("$AB", {});
+  check_cashtag("$A", {"$A"});
+  check_cashtag("$AB", {"$AB"});
+  check_cashtag("$ABС", {});
   check_cashtag("$АBC", {});
   check_cashtag("$АВС", {});
   check_cashtag("$ABC", {"$ABC"});
@@ -156,13 +169,172 @@ TEST(MessageEntities, cashtag) {
   check_cashtag(" А$ABC ", {});
   check_cashtag("$ABC$DEF $GHI $KLM", {"$GHI", "$KLM"});
   check_cashtag("$TEST", {"$TEST"});
+  check_cashtag("$1INC", {});
+  check_cashtag("$1INCH", {"$1INCH"});
+  check_cashtag("...$1INCH...", {"$1INCH"});
+  check_cashtag("$1inch", {});
+  check_cashtag("$1INCHA", {});
+  check_cashtag("$1INCHА", {});
   check_cashtag(u8"$ABC\u2122", {"$ABC"});
   check_cashtag(u8"\u2122$ABC", {"$ABC"});
   check_cashtag(u8"\u2122$ABC\u2122", {"$ABC"});
+  check_cashtag("$ABC൹", {"$ABC"});
+  check_cashtag("$ABCඁ", {});
+  check_cashtag("$ABCං", {});
+  check_cashtag("$ABC෴", {});
+  check_cashtag("$ABCก", {});
+  check_cashtag("$ABC฿", {"$ABC"});
+}
+
+static void check_media_timestamp(const td::string &str, const td::vector<std::pair<td::string, td::int32>> &expected) {
+  auto result = td::transform(td::find_media_timestamps(str),
+                              [](auto &&entity) { return std::make_pair(entity.first.str(), entity.second); });
+  if (result != expected) {
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result))
+               << td::tag("expected", td::format::as_array(expected));
+  }
+}
+
+TEST(MessageEntities, media_timestamp) {
+  check_media_timestamp("", {});
+  check_media_timestamp(":", {});
+  check_media_timestamp(":1", {});
+  check_media_timestamp("a:1", {});
+  check_media_timestamp("01", {});
+  check_media_timestamp("01:", {});
+  check_media_timestamp("01::", {});
+  check_media_timestamp("01::", {});
+  check_media_timestamp("a1:1a", {});
+  check_media_timestamp("a1::01a", {});
+  check_media_timestamp("2001:db8::8a2e:f70:13a4", {});
+  check_media_timestamp("0:00", {{"0:00", 0}});
+  check_media_timestamp("+0:00", {{"0:00", 0}});
+  check_media_timestamp("0:00+", {{"0:00", 0}});
+  check_media_timestamp("a0:00", {});
+  check_media_timestamp("0:00a", {});
+  check_media_timestamp("б0:00", {});
+  check_media_timestamp("0:00б", {});
+  check_media_timestamp("_0:00", {});
+  check_media_timestamp("0:00_", {});
+  check_media_timestamp("00:00:00:00", {});
+  check_media_timestamp("1:1:01 1:1:1", {{"1:1:01", 3661}});
+  check_media_timestamp("0:0:00 00:00 000:00 0000:00 00000:00 00:00:00 000:00:00 00:000:00 00:00:000",
+                        {{"0:0:00", 0}, {"00:00", 0}, {"000:00", 0}, {"0000:00", 0}, {"00:00:00", 0}});
+  check_media_timestamp("00:0:00 0:00:00 00::00 :00:00 00:00: 00:00:0 00:00:", {{"00:0:00", 0}, {"0:00:00", 0}});
+  check_media_timestamp("1:1:59 1:1:-1 1:1:60", {{"1:1:59", 3719}});
+  check_media_timestamp("1:59:00 1:-1:00 1:60:00", {{"1:59:00", 7140}, {"1:00", 60}});
+  check_media_timestamp("59:59 60:00", {{"59:59", 3599}, {"60:00", 3600}});
+  check_media_timestamp("9999:59 99:59:59 99:60:59", {{"9999:59", 599999}, {"99:59:59", 360000 - 1}});
+  check_media_timestamp("2001:db8::8a2e:f70:13a4", {});
+}
+
+static void check_bank_card_number(const td::string &str, const td::vector<td::string> &expected) {
+  auto result_slice = td::find_bank_card_numbers(str);
+  td::vector<td::string> result;
+  for (auto &it : result_slice) {
+    result.push_back(it.str());
+  }
+  if (result != expected) {
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result))
+               << td::tag("expected", td::format::as_array(expected));
+  }
+}
+
+TEST(MessageEntities, bank_card_number) {
+  check_bank_card_number("", {});
+  check_bank_card_number("123456789015", {});
+  check_bank_card_number("1234567890120", {});
+  check_bank_card_number("1234567890121", {});
+  check_bank_card_number("1234567890122", {});
+  check_bank_card_number("1234567890123", {});
+  check_bank_card_number("1234567890124", {});
+  check_bank_card_number("1234567890125", {});
+  check_bank_card_number("1234567890126", {});
+  check_bank_card_number("1234567890127", {});
+  check_bank_card_number("1234567890128", {"1234567890128"});
+  check_bank_card_number("1234567890129", {});
+  check_bank_card_number("12345678901500", {"12345678901500"});
+  check_bank_card_number("123456789012800", {"123456789012800"});
+  check_bank_card_number("1234567890151800", {"1234567890151800"});
+  check_bank_card_number("12345678901280000", {"12345678901280000"});
+  check_bank_card_number("123456789015009100", {"123456789015009100"});
+  check_bank_card_number("1234567890128000000", {"1234567890128000000"});
+  check_bank_card_number("12345678901500910000", {});
+  check_bank_card_number(" - - - - 1 - -- 2 - - -- 34 - - - 56- - 7890150000  - - - -", {});
+  check_bank_card_number(" - - - - 1 - -- 234 - - 56- - 7890150000  - - - -", {"1 - -- 234 - - 56- - 7890150000"});
+  check_bank_card_number("4916-3385-0608-2832; 5280 9342 8317 1080 ;345936346788903",
+                         {"4916-3385-0608-2832", "5280 9342 8317 1080", "345936346788903"});
+  check_bank_card_number("4556728228023269, 4916141675244747020, 49161416752447470, 4556728228023269",
+                         {"4556728228023269", "4916141675244747020", "4556728228023269"});
+  check_bank_card_number("a1234567890128", {});
+  check_bank_card_number("1234567890128a", {});
+  check_bank_card_number("1234567890128а", {});
+  check_bank_card_number("а1234567890128", {});
+  check_bank_card_number("1234567890128_", {});
+  check_bank_card_number("_1234567890128", {});
+  check_bank_card_number("1234567890128/", {"1234567890128"});
+  check_bank_card_number("\"1234567890128", {"1234567890128"});
+  check_bank_card_number("+1234567890128", {});
 }
 
-static void check_is_email_address(string str, bool expected) {
-  bool result = is_email_address(str);
+static void check_tg_url(const td::string &str, const td::vector<td::string> &expected) {
+  auto result_slice = td::find_tg_urls(str);
+  td::vector<td::string> result;
+  for (auto &it : result_slice) {
+    result.push_back(it.str());
+  }
+  if (result != expected) {
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result))
+               << td::tag("expected", td::format::as_array(expected));
+  }
+}
+
+TEST(MessageEntities, tg_url) {
+  check_tg_url("", {});
+  check_tg_url("tg://", {});
+  check_tg_url("tg://a", {"tg://a"});
+  check_tg_url("a", {});
+  check_tg_url("stg://a", {"tg://a"});
+  check_tg_url("asd  asdas das ton:asd tg:test ton://resolve tg://resolve TON://_-RESOLVE_- TG://-_RESOLVE-_",
+               {"ton://resolve", "tg://resolve", "TON://_-RESOLVE_-", "TG://-_RESOLVE-_"});
+  check_tg_url("tg:test/", {});
+  check_tg_url("tg:/test/", {});
+  check_tg_url("tg://test/", {"tg://test/"});
+  check_tg_url("tg://test/?", {"tg://test/"});
+  check_tg_url("tg://test/#", {"tg://test/#"});
+  check_tg_url("tg://test?", {"tg://test"});
+  check_tg_url("tg://test#", {"tg://test"});
+  check_tg_url("tg://test/―asd―?asd=asd&asdas=―#――――", {"tg://test/―asd―?asd=asd&asdas=―#――――"});
+  check_tg_url("tg://test/?asd", {"tg://test/?asd"});
+  check_tg_url("tg://test/?.:;,('?!`.:;,('?!`", {"tg://test/"});
+  check_tg_url("tg://test/#asdf", {"tg://test/#asdf"});
+  check_tg_url("tg://test?asdf", {"tg://test?asdf"});
+  check_tg_url("tg://test#asdf", {"tg://test#asdf"});
+  check_tg_url("tg://test?as‖df", {"tg://test?as"});
+  check_tg_url("tg://test?sa<df", {"tg://test?sa"});
+  check_tg_url("tg://test?as>df", {"tg://test?as"});
+  check_tg_url("tg://test?as\"df", {"tg://test?as"});
+  check_tg_url("tg://test?as«df", {"tg://test?as"});
+  check_tg_url("tg://test?as»df", {"tg://test?as"});
+  check_tg_url("tg://test?as(df", {"tg://test?as(df"});
+  check_tg_url("tg://test?as)df", {"tg://test?as)df"});
+  check_tg_url("tg://test?as[df", {"tg://test?as[df"});
+  check_tg_url("tg://test?as]df", {"tg://test?as]df"});
+  check_tg_url("tg://test?as{df", {"tg://test?as{df"});
+  check_tg_url("tg://test?as'df", {"tg://test?as'df"});
+  check_tg_url("tg://test?as}df", {"tg://test?as}df"});
+  check_tg_url("tg://test?as$df", {"tg://test?as$df"});
+  check_tg_url("tg://test?as%df", {"tg://test?as%df"});
+  check_tg_url("tg://%30/sccct", {});
+  check_tg_url("tg://test:asd@google.com:80", {"tg://test"});
+  check_tg_url("tg://google.com", {"tg://google"});
+  check_tg_url("tg://google/.com", {"tg://google/.com"});
+  check_tg_url("tg://127.0.0.1", {"tg://127"});
+  check_tg_url("tg://б.а.н.а.на", {});
+}
+
+static void check_is_email_address(const td::string &str, bool expected) {
+  bool result = td::is_email_address(str);
   LOG_IF(FATAL, result != expected) << "Expected " << expected << " as result of is_email_address(" << str << ")";
 }
 
@@ -183,79 +355,79 @@ TEST(MessageEntities, is_email_address) {
   check_is_email_address("a.ab", false);
   check_is_email_address("a.bc@d.ef", true);
 
-  vector<string> bad_userdatas = {"",
-                                  "a.a.a.a.a.a.a.a.a.a.a.a",
-                                  "+.+.+.+.+.+",
-                                  "*.a.a",
-                                  "a.*.a",
-                                  "a.a.*",
-                                  "a.a.",
-                                  "a.a.abcdefghijklmnopqrstuvwxyz0123456789",
-                                  "a.abcdefghijklmnopqrstuvwxyz0.a",
-                                  "abcdefghijklmnopqrstuvwxyz0.a.a"};
-  vector<string> good_userdatas = {"a.a.a.a.a.a.a.a.a.a.a",
-                                   "a+a+a+a+a+a+a+a+a+a+a",
-                                   "+.+.+.+.+._",
-                                   "aozAQZ0-5-9_+-aozAQZ0-5-9_.aozAQZ0-5-9_.-._.+-",
-                                   "a.a.a",
-                                   "a.a.abcdefghijklmnopqrstuvwxyz012345678",
-                                   "a.abcdefghijklmnopqrstuvwxyz.a",
-                                   "a..a",
-                                   "abcdefghijklmnopqrstuvwxyz.a.a",
-                                   ".a.a"};
-
-  vector<string> bad_domains = {"",
-                                ".",
-                                "abc",
-                                "localhost",
-                                "a.a.a.a.a.a.a.ab",
-                                ".......",
-                                "a.a.a.a.a.a+ab",
-                                "a+a.a.a.a.a.ab",
-                                "a.a.a.a.a.a.a",
-                                "a.a.a.a.a.a.abcdefg",
-                                "a.a.a.a.a.a.ab0yz",
-                                "a.a.a.a.a.a.ab9yz",
-                                "a.a.a.a.a.a.ab-yz",
-                                "a.a.a.a.a.a.ab_yz",
-                                "a.a.a.a.a.a.ab*yz",
-                                ".ab",
-                                ".a.ab",
-                                "a..ab",
-                                "a.a.a..a.ab",
-                                ".a.a.a.a.ab",
-                                "abcdefghijklmnopqrstuvwxyz01234.ab",
-                                "ab0cd.abd.aA*sd.0.9.0-9.ABOYZ",
-                                "ab*cd.abd.aAasd.0.9.0-9.ABOYZ",
-                                "ab0cd.abd.aAasd.0.9.0*9.ABOYZ",
-                                "*b0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0c*.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9.0-*.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9.*-9.ABOYZ",
-                                "-b0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0c-.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.-.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9.--9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9.0--.ABOYZ",
-                                "_b0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0c_.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd._.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9._-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9.0-_.ABOYZ",
-                                "-.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.-.0.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9.-.ABOYZ",
-                                "_.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                "ab0cd.ab_d._.0.9.0-9.ABOYZ",
-                                "ab0cd.ab_d.aA-sd.0.9._.ABOYZ"};
-  vector<string> good_domains = {"a.a.a.a.a.a.ab",
-                                 "a.a.a.a.a.a.abcdef",
-                                 "a.a.a.a.a.a.aboyz",
-                                 "a.a.a.a.a.a.ABOYZ",
-                                 "a.a.a.a.a.a.AbOyZ",
-                                 "abcdefghijklmnopqrstuvwxyz0123.ab",
-                                 "ab0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
-                                 "A.Z.aA-sd.a.z.0-9.ABOYZ"};
+  td::vector<td::string> bad_userdatas = {"",
+                                          "a.a.a.a.a.a.a.a.a.a.a.a",
+                                          "+.+.+.+.+.+",
+                                          "*.a.a",
+                                          "a.*.a",
+                                          "a.a.*",
+                                          "a.a.",
+                                          "a.a.abcdefghijklmnopqrstuvwxyz0123456789",
+                                          "a.abcdefghijklmnopqrstuvwxyz0.a",
+                                          "abcdefghijklmnopqrstuvwxyz0.a.a"};
+  td::vector<td::string> good_userdatas = {"a.a.a.a.a.a.a.a.a.a.a",
+                                           "a+a+a+a+a+a+a+a+a+a+a",
+                                           "+.+.+.+.+._",
+                                           "aozAQZ0-5-9_+-aozAQZ0-5-9_.aozAQZ0-5-9_.-._.+-",
+                                           "a.a.a",
+                                           "a.a.abcdefghijklmnopqrstuvwxyz012345678",
+                                           "a.abcdefghijklmnopqrstuvwxyz.a",
+                                           "a..a",
+                                           "abcdefghijklmnopqrstuvwxyz.a.a",
+                                           ".a.a"};
+
+  td::vector<td::string> bad_domains = {"",
+                                        ".",
+                                        "abc",
+                                        "localhost",
+                                        "a.a.a.a.a.a.a.ab",
+                                        ".......",
+                                        "a.a.a.a.a.a+ab",
+                                        "a+a.a.a.a.a.ab",
+                                        "a.a.a.a.a.a.a",
+                                        "a.a.a.a.a.a.abcdefghi",
+                                        "a.a.a.a.a.a.ab0yz",
+                                        "a.a.a.a.a.a.ab9yz",
+                                        "a.a.a.a.a.a.ab-yz",
+                                        "a.a.a.a.a.a.ab_yz",
+                                        "a.a.a.a.a.a.ab*yz",
+                                        ".ab",
+                                        ".a.ab",
+                                        "a..ab",
+                                        "a.a.a..a.ab",
+                                        ".a.a.a.a.ab",
+                                        "abcdefghijklmnopqrstuvwxyz01234.ab",
+                                        "ab0cd.abd.aA*sd.0.9.0-9.ABOYZ",
+                                        "ab*cd.abd.aAasd.0.9.0-9.ABOYZ",
+                                        "ab0cd.abd.aAasd.0.9.0*9.ABOYZ",
+                                        "*b0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0c*.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9.0-*.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9.*-9.ABOYZ",
+                                        "-b0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0c-.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.-.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9.--9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9.0--.ABOYZ",
+                                        "_b0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0c_.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd._.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9._-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9.0-_.ABOYZ",
+                                        "-.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.-.0.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9.-.ABOYZ",
+                                        "_.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d._.0.9.0-9.ABOYZ",
+                                        "ab0cd.ab_d.aA-sd.0.9._.ABOYZ"};
+  td::vector<td::string> good_domains = {"a.a.a.a.a.a.ab",
+                                         "a.a.a.a.a.a.abcdef",
+                                         "a.a.a.a.a.a.aboyz",
+                                         "a.a.a.a.a.a.ABOYZ",
+                                         "a.a.a.a.a.a.AbOyZ",
+                                         "abcdefghijklmnopqrstuvwxyz0123.ab",
+                                         "ab0cd.ab_d.aA-sd.0.9.0-9.ABOYZ",
+                                         "A.Z.aA-sd.a.z.0-9.ABOYZ"};
 
   for (auto &userdata : bad_userdatas) {
     for (auto &domain : bad_domains) {
@@ -279,11 +451,11 @@ TEST(MessageEntities, is_email_address) {
   }
 }
 
-static void check_url(string str, std::vector<string> expected_urls,
-                      std::vector<string> expected_email_addresses = {}) {
-  auto result_slice = find_urls(str);
-  std::vector<string> result_urls;
-  std::vector<string> result_email_addresses;
+static void check_url(const td::string &str, const td::vector<td::string> &expected_urls,
+                      td::vector<td::string> expected_email_addresses = {}) {
+  auto result_slice = td::find_urls(str);
+  td::vector<td::string> result_urls;
+  td::vector<td::string> result_email_addresses;
   for (auto &it : result_slice) {
     if (!it.second) {
       result_urls.push_back(it.first.str());
@@ -292,12 +464,12 @@ static void check_url(string str, std::vector<string> expected_urls,
     }
   }
   if (result_urls != expected_urls) {
-    LOG(FATAL) << tag("text", str) << tag("got", format::as_array(result_urls))
-               << tag("expected", format::as_array(expected_urls));
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result_urls))
+               << td::tag("expected", td::format::as_array(expected_urls));
   }
   if (result_email_addresses != expected_email_addresses) {
-    LOG(FATAL) << tag("text", str) << tag("got", format::as_array(result_email_addresses))
-               << tag("expected", format::as_array(expected_email_addresses));
+    LOG(FATAL) << td::tag("text", str) << td::tag("got", td::format::as_array(result_email_addresses))
+               << td::tag("expected", td::format::as_array(expected_email_addresses));
   }
 }
 
@@ -320,7 +492,7 @@ TEST(MessageEntities, url) {
   check_url(".", {});
   check_url("http://@google.com", {});
   check_url("http://@goog.com", {});  // TODO: server fix
-  check_url("http://@@google.com", {"http://@@google.com"});
+  check_url("http://@@google.com", {});
   check_url("http://a@google.com", {"http://a@google.com"});
   check_url("http://test@google.com", {"http://test@google.com"});
   check_url("google.com:᪉᪉᪉᪉᪉", {"google.com"});
@@ -328,7 +500,7 @@ TEST(MessageEntities, url) {
   check_url("http://telegram.org", {"http://telegram.org"});
   check_url("ftp://telegram.org", {"ftp://telegram.org"});
   check_url("ftps://telegram.org", {});
-  check_url("sftp://telegram.org", {"sftp://telegram.org"});
+  check_url("sftp://telegram.org", {});
   check_url("hTtPs://telegram.org", {"hTtPs://telegram.org"});
   check_url("HTTP://telegram.org", {"HTTP://telegram.org"});
   check_url("аHTTP://telegram.org", {"HTTP://telegram.org"});
@@ -360,7 +532,7 @@ TEST(MessageEntities, url) {
   check_url("http://a.0", {});
   check_url("http://a.a", {});
   check_url("google.com:1#ab c", {"google.com:1#ab"});
-  check_url("google.com:1#", {"google.com:1#"});
+  check_url("google.com:1#", {"google.com:1"});
   check_url("google.com:1#1", {"google.com:1#1"});
   check_url("google.com:00000001/abs", {"google.com:00000001/abs"});
   check_url("google.com:000000065535/abs", {"google.com:000000065535/abs"});
@@ -391,7 +563,8 @@ TEST(MessageEntities, url) {
   check_url("http://ÀТеСт.МоСкВач", {"http://ÀТеСт.МоСкВач"});
   check_url("ÀÁ.com. ÀÁ.com.", {"ÀÁ.com", "ÀÁ.com"});
   check_url("ÀÁ.com,ÀÁ.com.", {"ÀÁ.com", "ÀÁ.com"});
-  check_url("teiegram.org", {});
+  check_url("teiegram.org/test", {});
+  check_url("TeiegraM.org/test", {});
   check_url("http://test.google.com/?q=abc()}[]def", {"http://test.google.com/?q=abc()"});
   check_url("http://test.google.com/?q=abc([{)]}def", {"http://test.google.com/?q=abc([{)]}def"});
   check_url("http://test.google.com/?q=abc(){}]def", {"http://test.google.com/?q=abc(){}"});
@@ -402,18 +575,20 @@ TEST(MessageEntities, url) {
   check_url("http://google_.com", {});
   check_url("http://google._com_", {});
   check_url("http://[2001:4860:0:2001::68]/", {});  // TODO
+  check_url("tg://resolve", {});
   check_url("test.abd", {});
   check_url("/.b/..a    @.....@/. a.ba", {"a.ba"});
   check_url("bbbbbbbbbbbbbb.@.@", {});
   check_url("http://google.com/", {"http://google.com/"});
   check_url("http://google.com?", {"http://google.com"});
-  check_url("http://google.com#", {"http://google.com#"});
+  check_url("http://google.com#", {"http://google.com"});
+  check_url("http://google.com##", {"http://google.com##"});
   check_url("http://google.com/?", {"http://google.com/"});
   check_url("https://www.google.com/ab,", {"https://www.google.com/ab"});
   check_url("@.", {});
   check_url(
       "a.b.google.com dfsknnfs gsdfgsg http://códuia.de/ dffdg,\" 12)(cpia.de/())(\" http://гришка.рф/ sdufhdf "
-      "http://xn--80afpi2a3c.xn--p1ai/ I have a good time.Thanks, guys!\n\n(hdfughidufhgdis)go#ogle.com гришка.рф "
+      "http://xn--80afpi2a3c.xn--p1ai/ I have a good time.Thanks, guys!\n\n(hdfughidufhgdis) go#ogle.com гришка.рф "
       "hsighsdf gi почта.рф\n\n✪df.ws/123      "
       "xn--80afpi2a3c.xn--p1ai\n\nhttp://foo.com/blah_blah\nhttp://foo.com/blah_blah/\n(Something like "
       "http://foo.com/blah_blah)\nhttp://foo.com/blah_blah_(wikipedi8989a_Вася)\n(Something like "
@@ -469,7 +644,7 @@ TEST(MessageEntities, url) {
        "google.com/",
        "google.com/#",
        "google.com",
-       "google.com#"});
+       "google.com"});
   check_url("https://t.…", {});
   check_url("('http://telegram.org/a-b/?br=ie&lang=en',)", {"http://telegram.org/a-b/?br=ie&lang=en"});
   check_url("https://ai.telegram.org/bot%20bot/test-...", {"https://ai.telegram.org/bot%20bot/test-"});
@@ -482,11 +657,11 @@ TEST(MessageEntities, url) {
   check_url("https://a.de}bc@c.com", {"https://a.de"}, {"bc@c.com"});
   check_url("https://a.de(bc@c.com", {"https://a.de"}, {"bc@c.com"});
   check_url("https://a.de)bc@c.com", {"https://a.de"}, {"bc@c.com"});
-  check_url("https://a.de\\bc@c.com", {"https://a.de\\bc@c.com"});
+  check_url("https://a.debc@c.com", {"https://a.debc@c.com"});
   check_url("https://a.de'bc@c.com", {"https://a.de"}, {"bc@c.com"});
   check_url("https://a.de`bc@c.com", {"https://a.de"}, {"bc@c.com"});
-  check_url("https://a.bc:de.fg@c.com", {"https://a.bc:de.fg@c.com"});
-  check_url("https://a:h.bc:de.fg@c.com", {"https://a:h.bc:de.fg@c.com"});
+  check_url("https://a.bcde.fg@c.com", {"https://a.bcde.fg@c.com"});
+  check_url("https://a:h.bcde.fg@c.com", {"https://a:h.bcde.fg@c.com"});
   check_url("https://abc@c.com", {"https://abc@c.com"});
   check_url("https://de[bc@c.com", {}, {"bc@c.com"});
   check_url("https://de/bc@c.com", {});
@@ -515,8 +690,9 @@ TEST(MessageEntities, url) {
   check_url("<http://www.ics.uci.edu/pub/ietf/uri/historical.html#WARNING>",
             {"http://www.ics.uci.edu/pub/ietf/uri/historical.html#WARNING"});
   check_url("Look :test@example.com", {":test@example.com"}, {});  // TODO {}, {"test@example.com"}
+  check_url("Look mailto:test@example.com", {}, {"test@example.com"});
   check_url("http://test.com#a", {"http://test.com#a"});
-  check_url("http://test.com#", {"http://test.com#"});
+  check_url("http://test.com#", {"http://test.com"});
   check_url("http://test.com?#", {"http://test.com?#"});
   check_url("http://test.com/?#", {"http://test.com/?#"});
   check_url("https://t.me/abcdef…", {"https://t.me/abcdef"});
@@ -526,4 +702,1210 @@ TEST(MessageEntities, url) {
   check_url("https://t…", {});
   check_url("👉http://ab.com/cdefgh-1IJ", {"http://ab.com/cdefgh-1IJ"});
   check_url("...👉http://ab.com/cdefgh-1IJ", {});  // TODO
+  check_url(".?", {});
+  check_url("http://test―‑@―google―.―com―/―–―‐―/―/―/―?―‑―#―――", {"http://test―‑@―google―.―com―/―–―‐―/―/―/―?―‑―#―――"});
+  check_url("http://google.com/‖", {"http://google.com/"});
+  check_url("a@b@c.com", {}, {});
+  check_url("abc@c.com@d.com", {});
+  check_url("a@b.com:c@1", {}, {"a@b.com"});
+  check_url("test@test.software", {}, {"test@test.software"});
+  check_url("a:b?@gmail.com", {});
+  check_url("a?:b@gmail.com", {});
+  check_url("a#:b@gmail.com", {});
+  check_url("a:b#@gmail.com", {});
+  check_url("a!:b@gmail.com", {"a!:b@gmail.com"});
+  check_url("a:b!@gmail.com", {"a:b!@gmail.com"});
+  check_url("http://test_.com", {});
+  check_url("test_.com", {});
+  check_url("_test.com", {});
+  check_url("_.test.com", {"_.test.com"});
+}
+
+static void check_fix_formatted_text(td::string str, td::vector<td::MessageEntity> entities,
+                                     const td::string &expected_str,
+                                     const td::vector<td::MessageEntity> &expected_entities, bool allow_empty = true,
+                                     bool skip_new_entities = false, bool skip_bot_commands = false,
+                                     bool for_draft = true) {
+  ASSERT_TRUE(td::fix_formatted_text(str, entities, allow_empty, skip_new_entities, skip_bot_commands, true, for_draft)
+                  .is_ok());
+  ASSERT_STREQ(expected_str, str);
+  ASSERT_EQ(expected_entities, entities);
+}
+
+static void check_fix_formatted_text(td::string str, td::vector<td::MessageEntity> entities, bool allow_empty,
+                                     bool skip_new_entities, bool skip_bot_commands, bool for_draft) {
+  ASSERT_TRUE(td::fix_formatted_text(str, entities, allow_empty, skip_new_entities, skip_bot_commands, true, for_draft)
+                  .is_error());
+}
+
+TEST(MessageEntities, fix_formatted_text) {
+  td::string str;
+  td::string fixed_str;
+  for (auto i = 0; i <= 32; i++) {
+    str += static_cast<char>(i);
+    if (i != 13) {
+      if (i != 10) {
+        fixed_str += ' ';
+      } else {
+        fixed_str += str.back();
+      }
+    }
+  }
+
+  check_fix_formatted_text(str, {}, "", {}, true, true, true, true);
+  check_fix_formatted_text(str, {}, "", {}, true, true, false, true);
+  check_fix_formatted_text(str, {}, "", {}, true, false, true, true);
+  check_fix_formatted_text(str, {}, "", {}, true, false, false, true);
+  check_fix_formatted_text(str, {}, "", {}, true, false, false, false);
+  check_fix_formatted_text(str, {}, false, false, false, false);
+  check_fix_formatted_text(str, {}, false, false, false, true);
+
+  check_fix_formatted_text("  aba\n ", {}, "  aba\n ", {}, true, true, true, true);
+  check_fix_formatted_text("  aba\n ", {}, "aba", {}, true, true, true, false);
+  check_fix_formatted_text("  \n ", {}, "", {}, true, true, true, true);
+  check_fix_formatted_text("  \n ", {}, "", {}, true, true, true, false);
+  check_fix_formatted_text("  \n ", {}, false, true, true, false);
+
+  str += "a  \r\n  ";
+  fixed_str += "a  \n  ";
+
+  for (td::int32 i = 33; i <= 35; i++) {
+    td::vector<td::MessageEntity> entities;
+    entities.emplace_back(td::MessageEntity::Type::Pre, 0, i);
+
+    td::vector<td::MessageEntity> fixed_entities = entities;
+    fixed_entities.back().length = i - 1;
+    check_fix_formatted_text(str, entities, fixed_str, fixed_entities, true, false, false, true);
+
+    td::string expected_str = fixed_str.substr(0, 33);
+    fixed_entities.back().length = i == 33 ? 32 : 33;
+    check_fix_formatted_text(str, entities, expected_str, fixed_entities, false, false, false, false);
+  }
+
+  for (td::int32 i = 33; i <= 35; i++) {
+    td::vector<td::MessageEntity> entities;
+    entities.emplace_back(td::MessageEntity::Type::Bold, 0, i);
+
+    td::vector<td::MessageEntity> fixed_entities;
+    if (i != 33) {
+      fixed_entities.emplace_back(td::MessageEntity::Type::Bold, 32, i - 33);
+    }
+    check_fix_formatted_text(str, entities, fixed_str, fixed_entities, true, false, false, true);
+
+    td::string expected_str;
+    if (i != 33) {
+      fixed_entities.back().offset = 0;
+      fixed_entities.back().length = 1;
+    }
+    expected_str = "a";
+    check_fix_formatted_text(str, entities, expected_str, fixed_entities, false, false, false, false);
+  }
+
+  str = "👉 👉  ";
+  for (int i = 0; i < 10; i++) {
+    td::vector<td::MessageEntity> entities;
+    entities.emplace_back(td::MessageEntity::Type::Bold, i, 1);
+    if (i != 2 && i != 5 && i != 6) {
+      check_fix_formatted_text(str, entities, true, true, true, true);
+      check_fix_formatted_text(str, entities, false, false, false, false);
+    } else {
+      check_fix_formatted_text(str, entities, str, {}, true, true, true, true);
+      check_fix_formatted_text(str, entities, str.substr(0, str.size() - 2), {}, false, false, false, false);
+    }
+  }
+
+  str = "  /test @abaca #ORD $ABC  telegram.org ";
+  for (auto for_draft : {false, true}) {
+    td::int32 shift = for_draft ? 2 : 0;
+    td::string expected_str = for_draft ? str : str.substr(2, str.size() - 3);
+
+    for (auto skip_new_entities : {false, true}) {
+      for (auto skip_bot_commands : {false, true}) {
+        td::vector<td::MessageEntity> entities;
+        if (!skip_new_entities) {
+          if (!skip_bot_commands) {
+            entities.emplace_back(td::MessageEntity::Type::BotCommand, shift, 5);
+          }
+          entities.emplace_back(td::MessageEntity::Type::Mention, shift + 6, 6);
+          entities.emplace_back(td::MessageEntity::Type::Hashtag, shift + 13, 4);
+          entities.emplace_back(td::MessageEntity::Type::Cashtag, shift + 18, 4);
+          entities.emplace_back(td::MessageEntity::Type::Url, shift + 24, 12);
+        }
+
+        check_fix_formatted_text(str, {}, expected_str, entities, true, skip_new_entities, skip_bot_commands,
+                                 for_draft);
+        check_fix_formatted_text(str, {}, expected_str, entities, false, skip_new_entities, skip_bot_commands,
+                                 for_draft);
+      }
+    }
+  }
+
+  str = "aba \r\n caba ";
+  td::UserId user_id(static_cast<td::int64>(1));
+  for (td::int32 length = 1; length <= 3; length++) {
+    for (td::int32 offset = 0; static_cast<size_t>(offset + length) <= str.size(); offset++) {
+      for (auto type : {td::MessageEntity::Type::Bold, td::MessageEntity::Type::Url, td::MessageEntity::Type::TextUrl,
+                        td::MessageEntity::Type::MentionName}) {
+        for (auto for_draft : {false, true}) {
+          fixed_str = for_draft ? "aba \n caba " : "aba \n caba";
+          auto fixed_length = offset <= 4 && offset + length >= 5 ? length - 1 : length;
+          auto fixed_offset = offset >= 5 ? offset - 1 : offset;
+          if (static_cast<size_t>(fixed_offset) >= fixed_str.size()) {
+            fixed_length = 0;
+          }
+          while (static_cast<size_t>(fixed_offset + fixed_length) > fixed_str.size()) {
+            fixed_length--;
+          }
+          if (type == td::MessageEntity::Type::Bold || type == td::MessageEntity::Type::Url) {
+            while (fixed_length > 0 && (fixed_str[fixed_offset] == ' ' || fixed_str[fixed_offset] == '\n')) {
+              fixed_offset++;
+              fixed_length--;
+            }
+          }
+
+          td::vector<td::MessageEntity> entities;
+          entities.emplace_back(type, offset, length);
+          if (type == td::MessageEntity::Type::TextUrl) {
+            entities.back().argument = "t.me";
+          } else if (type == td::MessageEntity::Type::MentionName) {
+            entities.back().user_id = user_id;
+          }
+          td::vector<td::MessageEntity> fixed_entities;
+          if (fixed_length > 0) {
+            for (auto i = 0; i < length; i++) {
+              if (!td::is_space(str[offset + i]) || type == td::MessageEntity::Type::TextUrl ||
+                  type == td::MessageEntity::Type::MentionName) {
+                fixed_entities.emplace_back(type, fixed_offset, fixed_length);
+                if (type == td::MessageEntity::Type::TextUrl) {
+                  fixed_entities.back().argument = "t.me";
+                } else if (type == td::MessageEntity::Type::MentionName) {
+                  fixed_entities.back().user_id = user_id;
+                }
+                break;
+              }
+            }
+          }
+          check_fix_formatted_text(str, entities, fixed_str, fixed_entities, true, false, false, for_draft);
+        }
+      }
+    }
+  }
+
+  str = "aba caba";
+  for (td::int32 length = -10; length <= 10; length++) {
+    for (td::int32 offset = -10; offset <= 10; offset++) {
+      td::vector<td::MessageEntity> entities;
+      entities.emplace_back(td::MessageEntity::Type::Bold, offset, length);
+      if (length < 0 || offset < 0 || (length > 0 && static_cast<size_t>(length + offset) > str.size())) {
+        check_fix_formatted_text(str, entities, true, false, false, false);
+        check_fix_formatted_text(str, entities, false, false, false, true);
+        continue;
+      }
+
+      td::vector<td::MessageEntity> fixed_entities;
+      if (length > 0) {
+        if (offset == 3) {
+          if (length >= 2) {
+            fixed_entities.emplace_back(td::MessageEntity::Type::Bold, offset + 1, length - 1);
+          }
+        } else {
+          fixed_entities.emplace_back(td::MessageEntity::Type::Bold, offset, length);
+        }
+      }
+
+      check_fix_formatted_text(str, entities, str, fixed_entities, true, false, false, false);
+      check_fix_formatted_text(str, entities, str, fixed_entities, false, false, false, true);
+    }
+  }
+
+  str = "abadcaba";
+  for (td::int32 length = 1; length <= 7; length++) {
+    for (td::int32 offset = 0; offset <= 8 - length; offset++) {
+      for (td::int32 length2 = 1; length2 <= 7; length2++) {
+        for (td::int32 offset2 = 0; offset2 <= 8 - length2; offset2++) {
+          if (offset != offset2) {
+            td::vector<td::MessageEntity> entities;
+            entities.emplace_back(td::MessageEntity::Type::TextUrl, offset, length, "t.me");
+            entities.emplace_back(td::MessageEntity::Type::TextUrl, offset2, length2, "t.me");
+            entities.emplace_back(td::MessageEntity::Type::TextUrl, offset2 + length2, 1);
+            td::vector<td::MessageEntity> fixed_entities = entities;
+            fixed_entities.pop_back();
+            std::sort(fixed_entities.begin(), fixed_entities.end());
+            if (fixed_entities[0].offset + fixed_entities[0].length > fixed_entities[1].offset) {
+              fixed_entities.pop_back();
+            }
+            check_fix_formatted_text(str, entities, str, fixed_entities, false, false, false, false);
+          }
+        }
+      }
+    }
+  }
+
+  for (auto text : {" \n ➡️ ➡️ ➡️ ➡️  \n ", "\n\n\nab cd ef gh        "}) {
+    str = text;
+    td::vector<td::MessageEntity> entities;
+    td::vector<td::MessageEntity> fixed_entities;
+
+    auto length = td::narrow_cast<int>(td::utf8_utf16_length(str));
+    for (int i = 0; i < 10; i++) {
+      if ((i + 1) * 3 + 2 <= length) {
+        entities.emplace_back(td::MessageEntity::Type::Bold, (i + 1) * 3, 2);
+      }
+      if ((i + 2) * 3 <= length) {
+        entities.emplace_back(td::MessageEntity::Type::Italic, (i + 1) * 3 + 2, 1);
+      }
+
+      if (i < 4) {
+        fixed_entities.emplace_back(td::MessageEntity::Type::Bold, i * 3, 2);
+      }
+    }
+
+    check_fix_formatted_text(str, entities, td::utf8_utf16_substr(str, 3, 11).str(), fixed_entities, false, false,
+                             false, false);
+  }
+
+  for (td::string text : {"\t", "\r", "\n", "\t ", "\r ", "\n "}) {
+    for (auto type : {td::MessageEntity::Type::Bold, td::MessageEntity::Type::TextUrl}) {
+      check_fix_formatted_text(text, {{type, 0, 1, "http://telegram.org/"}}, "", {}, true, false, false, true);
+    }
+  }
+  check_fix_formatted_text("\r ", {{td::MessageEntity::Type::Bold, 0, 2}, {td::MessageEntity::Type::Underline, 0, 1}},
+                           "", {}, true, false, false, true);
+  check_fix_formatted_text("a \r", {{td::MessageEntity::Type::Bold, 0, 3}, {td::MessageEntity::Type::Underline, 2, 1}},
+                           "a ", {{td::MessageEntity::Type::Bold, 0, 2}}, true, false, false, true);
+  check_fix_formatted_text("a \r ", {{td::MessageEntity::Type::Bold, 0, 4}, {td::MessageEntity::Type::Underline, 2, 1}},
+                           "a  ", {{td::MessageEntity::Type::Bold, 0, 2}}, true, false, false, true);
+  check_fix_formatted_text(
+      "a \r b", {{td::MessageEntity::Type::Bold, 0, 5}, {td::MessageEntity::Type::Underline, 2, 1}}, "a  b",
+      {{td::MessageEntity::Type::Bold, 0, 2}, {td::MessageEntity::Type::Bold, 3, 1}}, true, false, false, true);
+
+  check_fix_formatted_text("a\rbc\r",
+                           {{td::MessageEntity::Type::Italic, 0, 1},
+                            {td::MessageEntity::Type::Bold, 0, 2},
+                            {td::MessageEntity::Type::Italic, 3, 2},
+                            {td::MessageEntity::Type::Bold, 3, 1}},
+                           "abc",
+                           {{td::MessageEntity::Type::Bold, 0, 1},
+                            {td::MessageEntity::Type::Italic, 0, 1},
+                            {td::MessageEntity::Type::Bold, 2, 1},
+                            {td::MessageEntity::Type::Italic, 2, 1}});
+  check_fix_formatted_text("a ", {{td::MessageEntity::Type::Italic, 0, 2}, {td::MessageEntity::Type::Bold, 0, 1}}, "a",
+                           {{td::MessageEntity::Type::Bold, 0, 1}, {td::MessageEntity::Type::Italic, 0, 1}}, false,
+                           false, false, false);
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 1, 1}, {td::MessageEntity::Type::Italic, 0, 1}},
+                           "abc", {{td::MessageEntity::Type::Italic, 0, 2}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 1, 1}, {td::MessageEntity::Type::Italic, 1, 1}},
+                           "abc", {{td::MessageEntity::Type::Italic, 1, 1}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 0, 2}, {td::MessageEntity::Type::Italic, 1, 2}},
+                           "abc", {{td::MessageEntity::Type::Italic, 0, 3}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 0, 2}, {td::MessageEntity::Type::Italic, 2, 1}},
+                           "abc", {{td::MessageEntity::Type::Italic, 0, 3}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 0, 1}, {td::MessageEntity::Type::Italic, 2, 1}},
+                           "abc", {{td::MessageEntity::Type::Italic, 0, 1}, {td::MessageEntity::Type::Italic, 2, 1}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 0, 2}, {td::MessageEntity::Type::Bold, 1, 2}},
+                           "abc",
+                           {{td::MessageEntity::Type::Italic, 0, 1},
+                            {td::MessageEntity::Type::Bold, 1, 2},
+                            {td::MessageEntity::Type::Italic, 1, 1}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 0, 2}, {td::MessageEntity::Type::Bold, 2, 1}},
+                           "abc", {{td::MessageEntity::Type::Italic, 0, 2}, {td::MessageEntity::Type::Bold, 2, 1}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 0, 1}, {td::MessageEntity::Type::Bold, 2, 1}},
+                           "abc", {{td::MessageEntity::Type::Italic, 0, 1}, {td::MessageEntity::Type::Bold, 2, 1}});
+  check_fix_formatted_text("@tests @tests", {{td::MessageEntity::Type::Italic, 0, 13}}, "@tests @tests",
+                           {{td::MessageEntity::Type::Mention, 0, 6},
+                            {td::MessageEntity::Type::Italic, 0, 6},
+                            {td::MessageEntity::Type::Mention, 7, 6},
+                            {td::MessageEntity::Type::Italic, 7, 6}});
+
+  // __a~b~__
+  check_fix_formatted_text(
+      "ab", {{td::MessageEntity::Type::Underline, 0, 2}, {td::MessageEntity::Type::Strikethrough, 1, 1}}, "ab",
+      {{td::MessageEntity::Type::Underline, 0, 1},
+       {td::MessageEntity::Type::Underline, 1, 1},
+       {td::MessageEntity::Type::Strikethrough, 1, 1}});
+  check_fix_formatted_text("ab",
+                           {{td::MessageEntity::Type::Underline, 0, 1},
+                            {td::MessageEntity::Type::Underline, 1, 1},
+                            {td::MessageEntity::Type::Strikethrough, 1, 1}},
+                           "ab",
+                           {{td::MessageEntity::Type::Underline, 0, 1},
+                            {td::MessageEntity::Type::Underline, 1, 1},
+                            {td::MessageEntity::Type::Strikethrough, 1, 1}});
+  check_fix_formatted_text(
+      "ab", {{td::MessageEntity::Type::Strikethrough, 0, 2}, {td::MessageEntity::Type::Underline, 1, 1}}, "ab",
+      {{td::MessageEntity::Type::Strikethrough, 0, 1},
+       {td::MessageEntity::Type::Underline, 1, 1},
+       {td::MessageEntity::Type::Strikethrough, 1, 1}});
+  check_fix_formatted_text("ab",
+                           {{td::MessageEntity::Type::Strikethrough, 0, 1},
+                            {td::MessageEntity::Type::Strikethrough, 1, 1},
+                            {td::MessageEntity::Type::Underline, 1, 1}},
+                           "ab",
+                           {{td::MessageEntity::Type::Strikethrough, 0, 1},
+                            {td::MessageEntity::Type::Underline, 1, 1},
+                            {td::MessageEntity::Type::Strikethrough, 1, 1}});
+
+  // __||a||b__
+  check_fix_formatted_text("ab", {{td::MessageEntity::Type::Underline, 0, 2}, {td::MessageEntity::Type::Spoiler, 0, 1}},
+                           "ab",
+                           {{td::MessageEntity::Type::Underline, 0, 2}, {td::MessageEntity::Type::Spoiler, 0, 1}});
+  check_fix_formatted_text("ab",
+                           {{td::MessageEntity::Type::Underline, 0, 1},
+                            {td::MessageEntity::Type::Underline, 1, 1},
+                            {td::MessageEntity::Type::Spoiler, 0, 1}},
+                           "ab",
+                           {{td::MessageEntity::Type::Underline, 0, 2}, {td::MessageEntity::Type::Spoiler, 0, 1}});
+
+  // _*a*_\r_*b*_
+  check_fix_formatted_text("a\rb",
+                           {{td::MessageEntity::Type::Bold, 0, 1},
+                            {td::MessageEntity::Type::Italic, 0, 1},
+                            {td::MessageEntity::Type::Bold, 2, 1},
+                            {td::MessageEntity::Type::Italic, 2, 1}},
+                           "ab", {{td::MessageEntity::Type::Bold, 0, 2}, {td::MessageEntity::Type::Italic, 0, 2}});
+  check_fix_formatted_text("a\nb",
+                           {{td::MessageEntity::Type::Bold, 0, 1},
+                            {td::MessageEntity::Type::Italic, 0, 1},
+                            {td::MessageEntity::Type::Bold, 2, 1},
+                            {td::MessageEntity::Type::Italic, 2, 1}},
+                           "a\nb",
+                           {{td::MessageEntity::Type::Bold, 0, 1},
+                            {td::MessageEntity::Type::Italic, 0, 1},
+                            {td::MessageEntity::Type::Bold, 2, 1},
+                            {td::MessageEntity::Type::Italic, 2, 1}});
+
+  // ||`a`||
+  check_fix_formatted_text("a", {{td::MessageEntity::Type::Pre, 0, 1}, {td::MessageEntity::Type::Spoiler, 0, 1}}, "a",
+                           {{td::MessageEntity::Type::Pre, 0, 1}});
+  check_fix_formatted_text("a", {{td::MessageEntity::Type::Spoiler, 0, 1}, {td::MessageEntity::Type::Pre, 0, 1}}, "a",
+                           {{td::MessageEntity::Type::Pre, 0, 1}});
+
+  check_fix_formatted_text("abc",
+                           {{td::MessageEntity::Type::Pre, 0, 3}, {td::MessageEntity::Type::Strikethrough, 1, 1}},
+                           "abc", {{td::MessageEntity::Type::Pre, 0, 3}});
+  check_fix_formatted_text(
+      "abc", {{td::MessageEntity::Type::Pre, 1, 1}, {td::MessageEntity::Type::Strikethrough, 0, 3}}, "abc",
+      {{td::MessageEntity::Type::Strikethrough, 0, 1},
+       {td::MessageEntity::Type::Pre, 1, 1},
+       {td::MessageEntity::Type::Strikethrough, 2, 1}});
+  check_fix_formatted_text(
+      "abc", {{td::MessageEntity::Type::Pre, 1, 1}, {td::MessageEntity::Type::Strikethrough, 1, 2}}, "abc",
+      {{td::MessageEntity::Type::Pre, 1, 1}, {td::MessageEntity::Type::Strikethrough, 2, 1}});
+  check_fix_formatted_text(
+      "abc", {{td::MessageEntity::Type::Pre, 1, 1}, {td::MessageEntity::Type::Strikethrough, 0, 2}}, "abc",
+      {{td::MessageEntity::Type::Strikethrough, 0, 1}, {td::MessageEntity::Type::Pre, 1, 1}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::Pre, 0, 3}, {td::MessageEntity::Type::BlockQuote, 1, 1}},
+                           "abc", {{td::MessageEntity::Type::BlockQuote, 1, 1}});
+  check_fix_formatted_text("abc", {{td::MessageEntity::Type::BlockQuote, 0, 3}, {td::MessageEntity::Type::Pre, 1, 1}},
+                           "abc", {{td::MessageEntity::Type::BlockQuote, 0, 3}, {td::MessageEntity::Type::Pre, 1, 1}});
+
+  check_fix_formatted_text("example.com", {}, "example.com", {{td::MessageEntity::Type::Url, 0, 11}});
+  check_fix_formatted_text("example.com", {{td::MessageEntity::Type::Pre, 0, 3}}, "example.com",
+                           {{td::MessageEntity::Type::Pre, 0, 3}});
+  check_fix_formatted_text("example.com", {{td::MessageEntity::Type::BlockQuote, 0, 3}}, "example.com",
+                           {{td::MessageEntity::Type::BlockQuote, 0, 3}});
+  check_fix_formatted_text("example.com", {{td::MessageEntity::Type::BlockQuote, 0, 11}}, "example.com",
+                           {{td::MessageEntity::Type::BlockQuote, 0, 11}, {td::MessageEntity::Type::Url, 0, 11}});
+  check_fix_formatted_text("example.com", {{td::MessageEntity::Type::Italic, 0, 11}}, "example.com",
+                           {{td::MessageEntity::Type::Url, 0, 11}, {td::MessageEntity::Type::Italic, 0, 11}});
+  check_fix_formatted_text("example.com", {{td::MessageEntity::Type::Italic, 0, 3}}, "example.com",
+                           {{td::MessageEntity::Type::Url, 0, 11}, {td::MessageEntity::Type::Italic, 0, 3}});
+  check_fix_formatted_text("example.com a", {{td::MessageEntity::Type::Italic, 0, 13}}, "example.com a",
+                           {{td::MessageEntity::Type::Url, 0, 11},
+                            {td::MessageEntity::Type::Italic, 0, 11},
+                            {td::MessageEntity::Type::Italic, 12, 1}});
+  check_fix_formatted_text("a example.com", {{td::MessageEntity::Type::Italic, 0, 13}}, "a example.com",
+                           {{td::MessageEntity::Type::Italic, 0, 2},
+                            {td::MessageEntity::Type::Url, 2, 11},
+                            {td::MessageEntity::Type::Italic, 2, 11}});
+
+  for (size_t test_n = 0; test_n < 100000; test_n++) {
+    bool is_url = td::Random::fast_bool();
+    td::int32 url_offset = 0;
+    td::int32 url_end = 0;
+    if (is_url) {
+      str = td::string(td::Random::fast(1, 5), 'a') + ":example.com:" + td::string(td::Random::fast(1, 5), 'a');
+      url_offset = static_cast<td::int32>(str.find('e'));
+      url_end = url_offset + 11;
+    } else {
+      str = td::string(td::Random::fast(1, 20), 'a');
+    }
+
+    auto n = td::Random::fast(1, 20);
+    td::vector<td::MessageEntity> entities;
+    for (int j = 0; j < n; j++) {
+      td::int32 type = td::Random::fast(4, 16);
+      td::int32 offset = td::Random::fast(0, static_cast<int>(str.size()) - 1);
+      auto max_length = static_cast<int>(str.size() - offset);
+      if ((test_n & 1) != 0 && max_length > 4) {
+        max_length = 4;
+      }
+      td::int32 length = td::Random::fast(0, max_length);
+      entities.emplace_back(static_cast<td::MessageEntity::Type>(type), offset, length);
+    }
+
+    auto get_type_mask = [](std::size_t length, const td::vector<td::MessageEntity> &entities) {
+      td::vector<td::int32> result(length);
+      for (auto &entity : entities) {
+        for (auto pos = 0; pos < entity.length; pos++) {
+          result[entity.offset + pos] |= (1 << static_cast<td::int32>(entity.type));
+        }
+      }
+      return result;
+    };
+    auto old_type_mask = get_type_mask(str.size(), entities);
+    ASSERT_TRUE(td::fix_formatted_text(str, entities, false, false, true, true, false).is_ok());
+    auto new_type_mask = get_type_mask(str.size(), entities);
+    auto splittable_mask = (1 << 5) | (1 << 6) | (1 << 14) | (1 << 15);
+    auto pre_mask = (1 << 7) | (1 << 8) | (1 << 9);
+    for (std::size_t pos = 0; pos < str.size(); pos++) {
+      if ((new_type_mask[pos] & pre_mask) != 0) {
+        ASSERT_EQ(0, new_type_mask[pos] & splittable_mask);
+      } else {
+        ASSERT_EQ(old_type_mask[pos] & splittable_mask, new_type_mask[pos] & splittable_mask);
+      }
+    }
+    bool keep_url = is_url;
+    td::MessageEntity url_entity(td::MessageEntity::Type::Url, url_offset, url_end - url_offset);
+    for (auto &entity : entities) {
+      if (entity == url_entity) {
+        continue;
+      }
+      td::int32 offset = entity.offset;
+      td::int32 end = offset + entity.length;
+
+      if (keep_url && ((1 << static_cast<td::int32>(entity.type)) & splittable_mask) == 0 &&
+          !(end <= url_offset || url_end <= offset)) {
+        keep_url = (entity.type == td::MessageEntity::Type::BlockQuote && offset <= url_offset && url_end <= end);
+      }
+    }
+    ASSERT_EQ(keep_url, std::count(entities.begin(), entities.end(), url_entity) == 1);
+
+    for (size_t i = 0; i < entities.size(); i++) {
+      auto type_mask = 1 << static_cast<td::int32>(entities[i].type);
+      for (size_t j = i + 1; j < entities.size(); j++) {
+        // sorted
+        ASSERT_TRUE(entities[j].offset > entities[i].offset ||
+                    (entities[j].offset == entities[i].offset && entities[j].length <= entities[i].length));
+
+        // not intersecting
+        ASSERT_TRUE(entities[j].offset >= entities[i].offset + entities[i].length ||
+                    entities[j].offset + entities[j].length <= entities[i].offset + entities[i].length);
+
+        if (entities[j].offset < entities[i].offset + entities[i].length) {  // if nested
+          // types are different
+          ASSERT_TRUE(entities[j].type != entities[i].type);
+
+          // pre can't contain other entities
+          ASSERT_TRUE((type_mask & pre_mask) == 0);
+
+          if ((type_mask & splittable_mask) == 0 && entities[i].type != td::MessageEntity::Type::BlockQuote) {
+            // continuous entities can contain only splittable entities
+            ASSERT_TRUE(((1 << static_cast<td::int32>(entities[j].type)) & splittable_mask) != 0);
+          }
+        }
+      }
+    }
+  }
+
+  check_fix_formatted_text(
+      "\xe2\x80\x8f\xe2\x80\x8f  \xe2\x80\x8e\xe2\x80\x8e\xe2\x80\x8e\xe2\x80\x8c \xe2\x80\x8f\xe2\x80\x8e "
+      "\xe2\x80\x8f",
+      {},
+      "\xe2\x80\x8c\xe2\x80\x8f  \xe2\x80\x8c\xe2\x80\x8c\xe2\x80\x8e\xe2\x80\x8c \xe2\x80\x8c\xe2\x80\x8e "
+      "\xe2\x80\x8f",
+      {});
+}
+
+static void check_parse_html(td::string text, const td::string &result, const td::vector<td::MessageEntity> &entities) {
+  auto r_entities = td::parse_html(text);
+  ASSERT_TRUE(r_entities.is_ok());
+  ASSERT_EQ(entities, r_entities.ok());
+  ASSERT_STREQ(result, text);
+}
+
+static void check_parse_html(td::string text, td::Slice error_message) {
+  auto r_entities = td::parse_html(text);
+  ASSERT_TRUE(r_entities.is_error());
+  ASSERT_EQ(400, r_entities.error().code());
+  ASSERT_STREQ(error_message, r_entities.error().message());
+}
+
+TEST(MessageEntities, parse_html) {
+  td::string invalid_surrogate_pair_error_message =
+      "Text contains invalid Unicode characters after decoding HTML entities, check for unmatched surrogate code units";
+  check_parse_html("&#57311;", invalid_surrogate_pair_error_message);
+  check_parse_html("&#xDFDF;", invalid_surrogate_pair_error_message);
+  check_parse_html("&#xDFDF", invalid_surrogate_pair_error_message);
+  check_parse_html("🏟 🏟&lt;<abacaba", "Unclosed start tag at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<abac aba>", "Unsupported start tag \"abac\" at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<abac>", "Unsupported start tag \"abac\" at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<i   =aba>", "Empty attribute name in the tag \"i\" at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<i    aba>",
+                   "Expected equal sign in declaration of an attribute of the tag \"i\" at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<i    aba  =  ", "Unclosed start tag \"i\" at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<i    aba  =  190azAz-.,", "Unexpected end of name token at byte offset 27");
+  check_parse_html("🏟 🏟&lt;<i    aba  =  \"&lt;&gt;&quot;>", "Unclosed start tag at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<i    aba  =  \'&lt;&gt;&quot;>", "Unclosed start tag at byte offset 13");
+  check_parse_html("🏟 🏟&lt;</", "Unexpected end tag at byte offset 13");
+  check_parse_html("🏟 🏟&lt;<b></b></", "Unexpected end tag at byte offset 20");
+  check_parse_html("🏟 🏟&lt;<i>a</i   ", "Unclosed end tag at byte offset 17");
+  check_parse_html("🏟 🏟&lt;<i>a</em   >",
+                   "Unmatched end tag at byte offset 17, expected \"</i>\", found \"</em>\"");
+
+  check_parse_html("", "", {});
+  check_parse_html("➡️ ➡️", "➡️ ➡️", {});
+  check_parse_html("&lt;&gt;&amp;&quot;&laquo;&raquo;&#12345678;", "<>&\"&laquo;&raquo;&#12345678;", {});
+  check_parse_html("➡️ ➡️<i>➡️ ➡️</i>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Italic, 5, 5}});
+  check_parse_html("➡️ ➡️<em>➡️ ➡️</em>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Italic, 5, 5}});
+  check_parse_html("➡️ ➡️<b>➡️ ➡️</b>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Bold, 5, 5}});
+  check_parse_html("➡️ ➡️<strong>➡️ ➡️</strong>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Bold, 5, 5}});
+  check_parse_html("➡️ ➡️<u>➡️ ➡️</u>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Underline, 5, 5}});
+  check_parse_html("➡️ ➡️<ins>➡️ ➡️</ins>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Underline, 5, 5}});
+  check_parse_html("➡️ ➡️<s>➡️ ➡️</s>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Strikethrough, 5, 5}});
+  check_parse_html("➡️ ➡️<strike>➡️ ➡️</strike>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Strikethrough, 5, 5}});
+  check_parse_html("➡️ ➡️<del>➡️ ➡️</del>", "➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Strikethrough, 5, 5}});
+  check_parse_html("➡️ ➡️<i>➡️ ➡️</i><b>➡️ ➡️</b>", "➡️ ➡️➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Italic, 5, 5}, {td::MessageEntity::Type::Bold, 10, 5}});
+  check_parse_html("🏟 🏟<i>🏟 &lt🏟</i>", "🏟 🏟🏟 <🏟", {{td::MessageEntity::Type::Italic, 5, 6}});
+  check_parse_html("🏟 🏟<i>🏟 &gt;<b aba   =   caba>&lt🏟</b></i>", "🏟 🏟🏟 ><🏟",
+                   {{td::MessageEntity::Type::Italic, 5, 7}, {td::MessageEntity::Type::Bold, 9, 3}});
+  check_parse_html("🏟 🏟&lt;<i    aba  =  190azAz-.   >a</i>", "🏟 🏟<a",
+                   {{td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_html("🏟 🏟&lt;<i    aba  =  190azAz-.>a</i>", "🏟 🏟<a",
+                   {{td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_html("🏟 🏟&lt;<i    aba  =  \"&lt;&gt;&quot;\">a</i>", "🏟 🏟<a",
+                   {{td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_html("🏟 🏟&lt;<i    aba  =  '&lt;&gt;&quot;'>a</i>", "🏟 🏟<a",
+                   {{td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_html("🏟 🏟&lt;<i    aba  =  '&lt;&gt;&quot;'>a</>", "🏟 🏟<a",
+                   {{td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_html("🏟 🏟&lt;<i>🏟 🏟&lt;</>", "🏟 🏟<🏟 🏟<",
+                   {{td::MessageEntity::Type::Italic, 6, 6}});
+  check_parse_html("🏟 🏟&lt;<i>a</    >", "🏟 🏟<a", {{td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_html("🏟 🏟&lt;<i>a</i   >", "🏟 🏟<a", {{td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_html("🏟 🏟&lt;<b></b>", "🏟 🏟<", {});
+  check_parse_html("<i>\t</i>", "\t", {{td::MessageEntity::Type::Italic, 0, 1}});
+  check_parse_html("<i>\r</i>", "\r", {{td::MessageEntity::Type::Italic, 0, 1}});
+  check_parse_html("<i>\n</i>", "\n", {{td::MessageEntity::Type::Italic, 0, 1}});
+  check_parse_html("➡️ ➡️<span class = \"tg-spoiler\">➡️ ➡️</span><b>➡️ ➡️</b>",
+                   "➡️ ➡️➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Spoiler, 5, 5}, {td::MessageEntity::Type::Bold, 10, 5}});
+  check_parse_html("🏟 🏟<span class=\"tg-spoiler\">🏟 &lt🏟</span>", "🏟 🏟🏟 <🏟",
+                   {{td::MessageEntity::Type::Spoiler, 5, 6}});
+  check_parse_html("🏟 🏟<span class=\"tg-spoiler\">🏟 &gt;<b aba   =   caba>&lt🏟</b></span>",
+                   "🏟 🏟🏟 ><🏟",
+                   {{td::MessageEntity::Type::Spoiler, 5, 7}, {td::MessageEntity::Type::Bold, 9, 3}});
+  check_parse_html("➡️ ➡️<tg-spoiler>➡️ ➡️</tg-spoiler><b>➡️ ➡️</b>",
+                   "➡️ ➡️➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::Spoiler, 5, 5}, {td::MessageEntity::Type::Bold, 10, 5}});
+  check_parse_html("🏟 🏟<tg-spoiler>🏟 &lt🏟</tg-spoiler>", "🏟 🏟🏟 <🏟",
+                   {{td::MessageEntity::Type::Spoiler, 5, 6}});
+  check_parse_html("🏟 🏟<tg-spoiler>🏟 &gt;<b aba   =   caba>&lt🏟</b></tg-spoiler>", "🏟 🏟🏟 ><🏟",
+                   {{td::MessageEntity::Type::Spoiler, 5, 7}, {td::MessageEntity::Type::Bold, 9, 3}});
+  check_parse_html("<a href=telegram.org>\t</a>", "\t",
+                   {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/"}});
+  check_parse_html("<a href=telegram.org>\r</a>", "\r",
+                   {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/"}});
+  check_parse_html("<a href=telegram.org>\n</a>", "\n",
+                   {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/"}});
+  check_parse_html("<code><i><b> </b></i></code><i><b><code> </code></b></i>", "  ",
+                   {{td::MessageEntity::Type::Code, 0, 1},
+                    {td::MessageEntity::Type::Bold, 0, 1},
+                    {td::MessageEntity::Type::Italic, 0, 1},
+                    {td::MessageEntity::Type::Code, 1, 1},
+                    {td::MessageEntity::Type::Bold, 1, 1},
+                    {td::MessageEntity::Type::Italic, 1, 1}});
+  check_parse_html("<i><b> </b> <code> </code></i>", "   ",
+                   {{td::MessageEntity::Type::Italic, 0, 3},
+                    {td::MessageEntity::Type::Bold, 0, 1},
+                    {td::MessageEntity::Type::Code, 2, 1}});
+  check_parse_html("<a href=telegram.org> </a>", " ",
+                   {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/"}});
+  check_parse_html("<a href  =\"telegram.org\"   > </a>", " ",
+                   {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/"}});
+  check_parse_html("<a   href=  'telegram.org'   > </a>", " ",
+                   {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/"}});
+  check_parse_html("<a   href=  'telegram.org?&lt;'   > </a>", " ",
+                   {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/?<"}});
+  check_parse_html("<a> </a>", " ", {});
+  check_parse_html("<a>telegram.org </a>", "telegram.org ", {});
+  check_parse_html("<a>telegram.org</a>", "telegram.org",
+                   {{td::MessageEntity::Type::TextUrl, 0, 12, "http://telegram.org/"}});
+  check_parse_html("<a>https://telegram.org/asdsa?asdasdwe#12e3we</a>", "https://telegram.org/asdsa?asdasdwe#12e3we",
+                   {{td::MessageEntity::Type::TextUrl, 0, 42, "https://telegram.org/asdsa?asdasdwe#12e3we"}});
+  check_parse_html("🏟 🏟&lt;<pre  >🏟 🏟&lt;</>", "🏟 🏟<🏟 🏟<",
+                   {{td::MessageEntity::Type::Pre, 6, 6}});
+  check_parse_html("🏟 🏟&lt;<code >🏟 🏟&lt;</>", "🏟 🏟<🏟 🏟<",
+                   {{td::MessageEntity::Type::Code, 6, 6}});
+  check_parse_html("🏟 🏟&lt;<pre><code>🏟 🏟&lt;</code></>", "🏟 🏟<🏟 🏟<",
+                   {{td::MessageEntity::Type::Pre, 6, 6}, {td::MessageEntity::Type::Code, 6, 6}});
+  check_parse_html("🏟 🏟&lt;<pre><code class=\"language-\">🏟 🏟&lt;</code></>", "🏟 🏟<🏟 🏟<",
+                   {{td::MessageEntity::Type::Pre, 6, 6}, {td::MessageEntity::Type::Code, 6, 6}});
+  check_parse_html("🏟 🏟&lt;<pre><code class=\"language-fift\">🏟 🏟&lt;</></>", "🏟 🏟<🏟 🏟<",
+                   {{td::MessageEntity::Type::PreCode, 6, 6, "fift"}});
+  check_parse_html("🏟 🏟&lt;<code class=\"language-fift\"><pre>🏟 🏟&lt;</></>", "🏟 🏟<🏟 🏟<",
+                   {{td::MessageEntity::Type::PreCode, 6, 6, "fift"}});
+  check_parse_html("🏟 🏟&lt;<pre><code class=\"language-fift\">🏟 🏟&lt;</> </>", "🏟 🏟<🏟 🏟< ",
+                   {{td::MessageEntity::Type::Pre, 6, 7}, {td::MessageEntity::Type::Code, 6, 6}});
+  check_parse_html("🏟 🏟&lt;<pre> <code class=\"language-fift\">🏟 🏟&lt;</></>", "🏟 🏟< 🏟 🏟<",
+                   {{td::MessageEntity::Type::Pre, 6, 7}, {td::MessageEntity::Type::Code, 7, 6}});
+  check_parse_html("➡️ ➡️<tg-emoji emoji-id = \"12345\">➡️ ➡️</tg-emoji><b>➡️ ➡️</b>",
+                   "➡️ ➡️➡️ ➡️➡️ ➡️",
+                   {{td::MessageEntity::Type::CustomEmoji, 5, 5, td::CustomEmojiId(static_cast<td::int64>(12345))},
+                    {td::MessageEntity::Type::Bold, 10, 5}});
+  check_parse_html("🏟 🏟<tg-emoji emoji-id=\"54321\">🏟 &lt🏟</tg-emoji>", "🏟 🏟🏟 <🏟",
+                   {{td::MessageEntity::Type::CustomEmoji, 5, 6, td::CustomEmojiId(static_cast<td::int64>(54321))}});
+  check_parse_html("🏟 🏟<b aba   =   caba><tg-emoji emoji-id=\"1\">🏟</tg-emoji>1</b>", "🏟 🏟🏟1",
+                   {{td::MessageEntity::Type::Bold, 5, 3},
+                    {td::MessageEntity::Type::CustomEmoji, 5, 2, td::CustomEmojiId(static_cast<td::int64>(1))}});
+}
+
+static void check_parse_markdown(td::string text, const td::string &result,
+                                 const td::vector<td::MessageEntity> &entities) {
+  auto r_entities = td::parse_markdown_v2(text);
+  ASSERT_TRUE(r_entities.is_ok());
+  ASSERT_EQ(entities, r_entities.ok());
+  ASSERT_STREQ(result, text);
+}
+
+static void check_parse_markdown(td::string text, td::Slice error_message) {
+  auto r_entities = td::parse_markdown_v2(text);
+  ASSERT_TRUE(r_entities.is_error());
+  ASSERT_EQ(400, r_entities.error().code());
+  ASSERT_STREQ(error_message, r_entities.error().message());
+}
+
+TEST(MessageEntities, parse_markdown) {
+  td::Slice reserved_characters("]()>#+-=|{}.!");
+  td::Slice begin_characters("_*[~`");
+  for (char c = 1; c < 126; c++) {
+    if (begin_characters.find(c) != td::Slice::npos) {
+      continue;
+    }
+
+    td::string text(1, c);
+    if (reserved_characters.find(c) == td::Slice::npos) {
+      check_parse_markdown(text, text, {});
+    } else {
+      check_parse_markdown(
+          text, PSLICE() << "Character '" << c << "' is reserved and must be escaped with the preceding '\\'");
+
+      td::string escaped_text = "\\" + text;
+      check_parse_markdown(escaped_text, text, {});
+    }
+  }
+
+  check_parse_markdown("🏟 🏟_abacaba", "Can't find end of Italic entity at byte offset 9");
+  check_parse_markdown("🏟 🏟_abac * asd ", "Can't find end of Bold entity at byte offset 15");
+  check_parse_markdown("🏟 🏟_abac * asd _", "Can't find end of Italic entity at byte offset 21");
+  check_parse_markdown("🏟 🏟`", "Can't find end of Code entity at byte offset 9");
+  check_parse_markdown("🏟 🏟```", "Can't find end of Pre entity at byte offset 9");
+  check_parse_markdown("🏟 🏟```a", "Can't find end of Pre entity at byte offset 9");
+  check_parse_markdown("🏟 🏟```a ", "Can't find end of PreCode entity at byte offset 9");
+  check_parse_markdown("🏟 🏟__🏟 🏟_", "Can't find end of Italic entity at byte offset 20");
+  check_parse_markdown("🏟 🏟_🏟 🏟__", "Can't find end of Underline entity at byte offset 19");
+  check_parse_markdown("🏟 🏟```🏟 🏟`", "Can't find end of Code entity at byte offset 21");
+  check_parse_markdown("🏟 🏟```🏟 🏟_", "Can't find end of PreCode entity at byte offset 9");
+  check_parse_markdown("🏟 🏟```🏟 🏟\\`", "Can't find end of PreCode entity at byte offset 9");
+  check_parse_markdown("[telegram\\.org](asd\\)", "Can't find end of a URL at byte offset 16");
+  check_parse_markdown("[telegram\\.org](", "Can't find end of a URL at byte offset 16");
+  check_parse_markdown("[telegram\\.org](asd", "Can't find end of a URL at byte offset 16");
+  check_parse_markdown("🏟 🏟__🏟 _🏟___", "Can't find end of Italic entity at byte offset 23");
+  check_parse_markdown("🏟 🏟__", "Can't find end of Underline entity at byte offset 9");
+  check_parse_markdown("🏟 🏟||test\\|", "Can't find end of Spoiler entity at byte offset 9");
+  check_parse_markdown("🏟 🏟!", "Character '!' is reserved and must be escaped with the preceding '\\'");
+  check_parse_markdown("🏟 🏟![", "Can't find end of CustomEmoji entity at byte offset 9");
+  check_parse_markdown("🏟 🏟![👍", "Can't find end of CustomEmoji entity at byte offset 9");
+  check_parse_markdown("🏟 🏟![👍]", "Custom emoji entity must contain a tg://emoji URL");
+  check_parse_markdown("🏟 🏟![👍](tg://emoji?id=1234", "Can't find end of a custom emoji URL at byte offset 17");
+  check_parse_markdown("🏟 🏟![👍](t://emoji?id=1234)", "Custom emoji URL must have scheme tg");
+  check_parse_markdown("🏟 🏟![👍](tg:emojis?id=1234)", "Custom emoji URL must have host \"emoji\"");
+  check_parse_markdown("🏟 🏟![👍](tg://emoji#test)", "Custom emoji URL must have an emoji identifier");
+  check_parse_markdown("🏟 🏟![👍](tg://emoji?test=1#&id=25)", "Custom emoji URL must have an emoji identifier");
+  check_parse_markdown("🏟 🏟![👍](tg://emoji?test=1231&id=025)", "Invalid custom emoji identifier specified");
+
+  check_parse_markdown("", "", {});
+  check_parse_markdown("\\\\", "\\", {});
+  check_parse_markdown("\\\\\\", "\\\\", {});
+  check_parse_markdown("\\\\\\\\\\_\\*\\`", "\\\\_*`", {});
+  check_parse_markdown("➡️ ➡️", "➡️ ➡️", {});
+  check_parse_markdown("🏟 🏟``", "🏟 🏟", {});
+  check_parse_markdown("🏟 🏟_abac \\* asd _", "🏟 🏟abac * asd ", {{td::MessageEntity::Type::Italic, 5, 11}});
+  check_parse_markdown("🏟 \\.🏟_🏟\\. 🏟_", "🏟 .🏟🏟. 🏟", {{td::MessageEntity::Type::Italic, 6, 6}});
+  check_parse_markdown("\\\\\\a\\b\\c\\d\\e\\f\\1\\2\\3\\4\\➡️\\", "\\abcdef1234\\➡️\\", {});
+  check_parse_markdown("➡️ ➡️_➡️ ➡️_", "➡️ ➡️➡️ ➡️",
+                       {{td::MessageEntity::Type::Italic, 5, 5}});
+  check_parse_markdown("➡️ ➡️_➡️ ➡️_*➡️ ➡️*", "➡️ ➡️➡️ ➡️➡️ ➡️",
+                       {{td::MessageEntity::Type::Italic, 5, 5}, {td::MessageEntity::Type::Bold, 10, 5}});
+  check_parse_markdown("🏟 🏟_🏟 \\.🏟_", "🏟 🏟🏟 .🏟", {{td::MessageEntity::Type::Italic, 5, 6}});
+  check_parse_markdown("🏟 🏟_🏟 *🏟*_", "🏟 🏟🏟 🏟",
+                       {{td::MessageEntity::Type::Italic, 5, 5}, {td::MessageEntity::Type::Bold, 8, 2}});
+  check_parse_markdown("🏟 🏟_🏟 __🏟___", "🏟 🏟🏟 🏟",
+                       {{td::MessageEntity::Type::Italic, 5, 5}, {td::MessageEntity::Type::Underline, 8, 2}});
+  check_parse_markdown("🏟 🏟__🏟 _🏟_ __", "🏟 🏟🏟 🏟 ",
+                       {{td::MessageEntity::Type::Underline, 5, 6}, {td::MessageEntity::Type::Italic, 8, 2}});
+  check_parse_markdown("🏟 🏟__🏟 _🏟_\\___", "🏟 🏟🏟 🏟_",
+                       {{td::MessageEntity::Type::Underline, 5, 6}, {td::MessageEntity::Type::Italic, 8, 2}});
+  check_parse_markdown("🏟 🏟`🏟 🏟```", "🏟 🏟🏟 🏟", {{td::MessageEntity::Type::Code, 5, 5}});
+  check_parse_markdown("🏟 🏟```🏟 🏟```", "🏟 🏟 🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 3, "🏟"}});
+  check_parse_markdown("🏟 🏟```🏟\n🏟```", "🏟 🏟🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 2, "🏟"}});
+  check_parse_markdown("🏟 🏟```🏟\r🏟```", "🏟 🏟🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 2, "🏟"}});
+  check_parse_markdown("🏟 🏟```🏟\n\r🏟```", "🏟 🏟🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 2, "🏟"}});
+  check_parse_markdown("🏟 🏟```🏟\r\n🏟```", "🏟 🏟🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 2, "🏟"}});
+  check_parse_markdown("🏟 🏟```🏟\n\n🏟```", "🏟 🏟\n🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 3, "🏟"}});
+  check_parse_markdown("🏟 🏟```🏟\r\r🏟```", "🏟 🏟\r🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 3, "🏟"}});
+  check_parse_markdown("🏟 🏟```🏟 \\\\\\`🏟```", "🏟 🏟 \\`🏟",
+                       {{td::MessageEntity::Type::PreCode, 5, 5, "🏟"}});
+  check_parse_markdown("🏟 🏟**", "🏟 🏟", {});
+  check_parse_markdown("||test||", "test", {{td::MessageEntity::Type::Spoiler, 0, 4}});
+  check_parse_markdown("🏟 🏟``", "🏟 🏟", {});
+  check_parse_markdown("🏟 🏟``````", "🏟 🏟", {});
+  check_parse_markdown("🏟 🏟____", "🏟 🏟", {});
+  check_parse_markdown("`_* *_`__*` `*__", "_* *_ ",
+                       {{td::MessageEntity::Type::Code, 0, 5},
+                        {td::MessageEntity::Type::Code, 5, 1},
+                        {td::MessageEntity::Type::Bold, 5, 1},
+                        {td::MessageEntity::Type::Underline, 5, 1}});
+  check_parse_markdown("_* * ` `_", "   ",
+                       {{td::MessageEntity::Type::Italic, 0, 3},
+                        {td::MessageEntity::Type::Bold, 0, 1},
+                        {td::MessageEntity::Type::Code, 2, 1}});
+  check_parse_markdown("[](telegram.org)", "", {});
+  check_parse_markdown("[ ](telegram.org)", " ", {{td::MessageEntity::Type::TextUrl, 0, 1, "http://telegram.org/"}});
+  check_parse_markdown("[ ](as)", " ", {});
+  check_parse_markdown("[telegram\\.org]", "telegram.org",
+                       {{td::MessageEntity::Type::TextUrl, 0, 12, "http://telegram.org/"}});
+  check_parse_markdown("[telegram\\.org]a", "telegram.orga",
+                       {{td::MessageEntity::Type::TextUrl, 0, 12, "http://telegram.org/"}});
+  check_parse_markdown("[telegram\\.org](telegram.dog)", "telegram.org",
+                       {{td::MessageEntity::Type::TextUrl, 0, 12, "http://telegram.dog/"}});
+  check_parse_markdown("[telegram\\.org](https://telegram.dog?)", "telegram.org",
+                       {{td::MessageEntity::Type::TextUrl, 0, 12, "https://telegram.dog/?"}});
+  check_parse_markdown("[telegram\\.org](https://telegram.dog?\\\\\\()", "telegram.org",
+                       {{td::MessageEntity::Type::TextUrl, 0, 12, "https://telegram.dog/?\\("}});
+  check_parse_markdown("[telegram\\.org]()", "telegram.org", {});
+  check_parse_markdown("[telegram\\.org](asdasd)", "telegram.org", {});
+  check_parse_markdown("[telegram\\.org](tg:user?id=123456)", "telegram.org",
+                       {{0, 12, td::UserId(static_cast<td::int64>(123456))}});
+  check_parse_markdown("🏟 🏟![👍](TG://EMoJI/?test=1231&id=25#id=32)a", "🏟 🏟👍a",
+                       {{td::MessageEntity::Type::CustomEmoji, 5, 2, td::CustomEmojiId(static_cast<td::int64>(25))}});
+}
+
+static void check_parse_markdown_v3(td::string text, td::vector<td::MessageEntity> entities,
+                                    const td::string &result_text, const td::vector<td::MessageEntity> &result_entities,
+                                    bool fix = false) {
+  auto parsed_text = td::parse_markdown_v3({std::move(text), std::move(entities)});
+  if (fix) {
+    ASSERT_TRUE(td::fix_formatted_text(parsed_text.text, parsed_text.entities, true, true, true, true, true).is_ok());
+  }
+  ASSERT_STREQ(result_text, parsed_text.text);
+  ASSERT_EQ(result_entities, parsed_text.entities);
+  if (fix) {
+    auto markdown_text = td::get_markdown_v3(parsed_text);
+    ASSERT_TRUE(parsed_text == markdown_text || parsed_text == td::parse_markdown_v3(markdown_text));
+  }
+}
+
+static void check_parse_markdown_v3(td::string text, const td::string &result_text,
+                                    const td::vector<td::MessageEntity> &result_entities, bool fix = false) {
+  check_parse_markdown_v3(std::move(text), td::vector<td::MessageEntity>(), result_text, result_entities, fix);
+}
+
+TEST(MessageEntities, parse_markdown_v3) {
+  check_parse_markdown_v3("🏟````🏟``🏟`aba🏟```c🏟`aba🏟 daba🏟```c🏟`aba🏟```🏟 `🏟``🏟```",
+                          "🏟````🏟``🏟aba🏟```c🏟aba🏟 daba🏟c🏟`aba🏟🏟 `🏟``🏟```",
+                          {{td::MessageEntity::Type::Code, 12, 11}, {td::MessageEntity::Type::Pre, 35, 9}});
+  check_parse_markdown_v3(
+      "🏟````🏟``🏟`aba🏟```c🏟`aba🏟 daba🏟```c🏟`aba🏟🏟```🏟 `🏟``🏟```",
+      {{td::MessageEntity::Type::Italic, 12, 1},
+       {td::MessageEntity::Type::Italic, 44, 1},
+       {td::MessageEntity::Type::Bold, 45, 1},
+       {td::MessageEntity::Type::Bold, 49, 2}},
+      "🏟````🏟``🏟`aba🏟c🏟`aba🏟 daba🏟c🏟`aba🏟🏟🏟 `🏟``🏟",
+      {{td::MessageEntity::Type::Italic, 12, 1},
+       {td::MessageEntity::Type::Pre, 18, 16},
+       {td::MessageEntity::Type::Italic, 38, 1},
+       {td::MessageEntity::Type::Bold, 39, 1},
+       {td::MessageEntity::Type::Bold, 43, 2},
+       {td::MessageEntity::Type::Pre, 45, 10}});
+  check_parse_markdown_v3("` `", " ", {{td::MessageEntity::Type::Code, 0, 1}});
+  check_parse_markdown_v3("`\n`", "\n", {{td::MessageEntity::Type::Code, 0, 1}});
+  check_parse_markdown_v3("` `a", " a", {{td::MessageEntity::Type::Code, 0, 1}}, true);
+  check_parse_markdown_v3("`\n`a", "\na", {{td::MessageEntity::Type::Code, 0, 1}}, true);
+  check_parse_markdown_v3("``", "``", {});
+  check_parse_markdown_v3("`a````b```", "`a````b```", {});
+  check_parse_markdown_v3("ab", {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Pre, 1, 1}}, "ab",
+                          {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Pre, 1, 1}});
+
+  check_parse_markdown_v3("[a](b[c](t.me)", "[a](b[c](t.me)", {});
+  check_parse_markdown_v3("[](t.me)", "[](t.me)", {});
+  check_parse_markdown_v3("[ ](t.me)", " ", {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"}});
+  check_parse_markdown_v3("[ ](t.me)", "", {}, true);
+  check_parse_markdown_v3("[ ](t.me)a", " a", {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"}}, true);
+  check_parse_markdown_v3(
+      "[ ](t.me) [ ](t.me)",
+      {{td::MessageEntity::Type::TextUrl, 8, 1, "http://t.me/"}, {10, 1, td::UserId(static_cast<td::int64>(1))}},
+      "[ ](t.me) [ ](t.me)",
+      {{td::MessageEntity::Type::TextUrl, 8, 1, "http://t.me/"}, {10, 1, td::UserId(static_cast<td::int64>(1))}});
+  check_parse_markdown_v3("[\n](t.me)", "\n", {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"}});
+  check_parse_markdown_v3("[\n](t.me)a", "\na", {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"}}, true);
+  check_parse_markdown_v3("asd[abcd](google.com)", {{td::MessageEntity::Type::Italic, 0, 5}}, "asdabcd",
+                          {{td::MessageEntity::Type::Italic, 0, 3},
+                           {td::MessageEntity::Type::TextUrl, 3, 4, "http://google.com/"},
+                           {td::MessageEntity::Type::Italic, 3, 1}});
+  check_parse_markdown_v3("asd[abcd](google.com)efg[hi](https://t.me?t=1#h)e",
+                          {{td::MessageEntity::Type::Italic, 0, 5}, {td::MessageEntity::Type::Italic, 18, 31}},
+                          "asdabcdefghie",
+                          {{td::MessageEntity::Type::Italic, 0, 3},
+                           {td::MessageEntity::Type::TextUrl, 3, 4, "http://google.com/"},
+                           {td::MessageEntity::Type::Italic, 3, 1},
+                           {td::MessageEntity::Type::Italic, 7, 3},
+                           {td::MessageEntity::Type::TextUrl, 10, 2, "https://t.me/?t=1#h"},
+                           {td::MessageEntity::Type::Italic, 10, 2},
+                           {td::MessageEntity::Type::Italic, 12, 1}});
+  check_parse_markdown_v3(
+      "🏟🏟🏟[🏟🏟🏟🏟🏟](www.🤙.tk#1)🤙🤙🤙[🏟🏟🏟🏟](www.🤙.tk#2)🤙🤙🤙["
+      "🏟🏟🏟🏟](www.🤙.tk#3)🏟🏟🏟[🏟🏟🏟🏟](www.🤙.tk#4)🤙🤙",
+      "🏟🏟🏟🏟🏟🏟🏟🏟🤙🤙🤙🏟🏟🏟🏟🤙🤙🤙🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟"
+      "🏟🤙🤙",
+      {{td::MessageEntity::Type::TextUrl, 6, 10, "http://www.🤙.tk/#1"},
+       {td::MessageEntity::Type::TextUrl, 22, 8, "http://www.🤙.tk/#2"},
+       {td::MessageEntity::Type::TextUrl, 36, 8, "http://www.🤙.tk/#3"},
+       {td::MessageEntity::Type::TextUrl, 50, 8, "http://www.🤙.tk/#4"}});
+  check_parse_markdown_v3(
+      "[🏟🏟🏟🏟🏟](www.🤙.tk#1)[🏟🏟🏟🏟](www.🤙.tk#2)[🏟🏟🏟🏟](www.🤙.tk#3)["
+      "🏟🏟🏟🏟](www.🤙.tk#4)",
+      "🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟",
+      {{td::MessageEntity::Type::TextUrl, 0, 10, "http://www.🤙.tk/#1"},
+       {td::MessageEntity::Type::TextUrl, 10, 8, "http://www.🤙.tk/#2"},
+       {td::MessageEntity::Type::TextUrl, 18, 8, "http://www.🤙.tk/#3"},
+       {td::MessageEntity::Type::TextUrl, 26, 8, "http://www.🤙.tk/#4"}});
+  check_parse_markdown_v3(
+      "🏟🏟🏟[🏟🏟🏟🏟🏟](www.🤙.tk)🤙🤙🤙[🏟🏟🏟🏟](www.🤙.tk)🤙🤙🤙["
+      "🏟🏟🏟🏟](www.🤙.tk)🏟🏟🏟[🏟🏟🏟🏟](www.🤙.tk)🤙🤙",
+      {{td::MessageEntity::Type::Bold, 0, 2},
+       {td::MessageEntity::Type::Bold, 4, 2},
+       {td::MessageEntity::Type::Bold, 7, 2},
+       {td::MessageEntity::Type::Bold, 11, 2},
+       {td::MessageEntity::Type::Bold, 15, 2},
+       {td::MessageEntity::Type::Bold, 18, 2},
+       {td::MessageEntity::Type::Bold, 26, 2},
+       {31, 2, td::UserId(static_cast<td::int64>(1))},
+       {td::MessageEntity::Type::Bold, 35, 1},
+       {td::MessageEntity::Type::Bold, 44, 2},
+       {td::MessageEntity::Type::Bold, 50, 2},
+       {td::MessageEntity::Type::Bold, 54, 2},
+       {56, 2, td::UserId(static_cast<td::int64>(2))},
+       {td::MessageEntity::Type::Bold, 58, 7},
+       {60, 2, td::UserId(static_cast<td::int64>(3))},
+       {td::MessageEntity::Type::Bold, 67, 7},
+       {td::MessageEntity::Type::Bold, 80, 7},
+       {td::MessageEntity::Type::Bold, 89, 25}},
+      "🏟🏟🏟🏟🏟🏟🏟🏟🤙🤙🤙🏟🏟🏟🏟🤙🤙🤙🏟🏟🏟🏟🏟🏟🏟🏟🏟🏟"
+      "🏟🤙🤙",
+      {{td::MessageEntity::Type::Bold, 0, 2},
+       {td::MessageEntity::Type::Bold, 4, 2},
+       {td::MessageEntity::Type::TextUrl, 6, 10, "http://www.🤙.tk/"},
+       {td::MessageEntity::Type::Bold, 6, 2},
+       {td::MessageEntity::Type::Bold, 10, 2},
+       {td::MessageEntity::Type::Bold, 14, 2},
+       {18, 2, td::UserId(static_cast<td::int64>(1))},
+       {td::MessageEntity::Type::TextUrl, 22, 8, "http://www.🤙.tk/"},
+       {30, 2, td::UserId(static_cast<td::int64>(2))},
+       {td::MessageEntity::Type::Bold, 32, 2},
+       {34, 2, td::UserId(static_cast<td::int64>(3))},
+       {td::MessageEntity::Type::Bold, 34, 2},
+       {td::MessageEntity::Type::TextUrl, 36, 8, "http://www.🤙.tk/"},
+       {td::MessageEntity::Type::Bold, 36, 2},
+       {td::MessageEntity::Type::Bold, 40, 4},
+       {td::MessageEntity::Type::Bold, 44, 4},
+       {td::MessageEntity::Type::TextUrl, 50, 8, "http://www.🤙.tk/"},
+       {td::MessageEntity::Type::Bold, 50, 8},
+       {td::MessageEntity::Type::Bold, 58, 4}});
+  check_parse_markdown_v3("[`a`](t.me) [b](t.me)", {{td::MessageEntity::Type::Code, 13, 1}}, "[a](t.me) [b](t.me)",
+                          {{td::MessageEntity::Type::Code, 1, 1}, {td::MessageEntity::Type::Code, 11, 1}});
+  check_parse_markdown_v3(
+      "[text](example.com)",
+      {{td::MessageEntity::Type::Strikethrough, 0, 1}, {td::MessageEntity::Type::Strikethrough, 5, 14}}, "text",
+      {{td::MessageEntity::Type::TextUrl, 0, 4, "http://example.com/"}});
+  check_parse_markdown_v3("[text](example.com)",
+                          {{td::MessageEntity::Type::Spoiler, 0, 1}, {td::MessageEntity::Type::Spoiler, 5, 14}}, "text",
+                          {{td::MessageEntity::Type::TextUrl, 0, 4, "http://example.com/"}});
+
+  check_parse_markdown_v3("🏟[🏟](t.me) `🏟` [🏟](t.me) `a`", "🏟🏟 🏟 🏟 a",
+                          {{td::MessageEntity::Type::TextUrl, 2, 2, "http://t.me/"},
+                           {td::MessageEntity::Type::Code, 5, 2},
+                           {td::MessageEntity::Type::TextUrl, 8, 2, "http://t.me/"},
+                           {td::MessageEntity::Type::Code, 11, 1}});
+
+  check_parse_markdown_v3("__ __", " ", {{td::MessageEntity::Type::Italic, 0, 1}});
+  check_parse_markdown_v3("__\n__", "\n", {{td::MessageEntity::Type::Italic, 0, 1}});
+  check_parse_markdown_v3("__ __a", " a", {}, true);
+  check_parse_markdown_v3("__\n__a", "\na", {}, true);
+  check_parse_markdown_v3("**** __a__ **b** ~~c~~ ||d||", "**** a b c d",
+                          {{td::MessageEntity::Type::Italic, 5, 1},
+                           {td::MessageEntity::Type::Bold, 7, 1},
+                           {td::MessageEntity::Type::Strikethrough, 9, 1},
+                           {td::MessageEntity::Type::Spoiler, 11, 1}});
+  check_parse_markdown_v3("тест __аааа__ **бббб** ~~вввв~~ ||гггг||", "тест аааа бббб вввв гггг",
+                          {{td::MessageEntity::Type::Italic, 5, 4},
+                           {td::MessageEntity::Type::Bold, 10, 4},
+                           {td::MessageEntity::Type::Strikethrough, 15, 4},
+                           {td::MessageEntity::Type::Spoiler, 20, 4}});
+  check_parse_markdown_v3("___a___ ***b** ~c~~", "___a___ ***b** ~c~~", {});
+  check_parse_markdown_v3(
+      "__asd[ab__cd](t.me)", "asdabcd",
+      {{td::MessageEntity::Type::Italic, 0, 5}, {td::MessageEntity::Type::TextUrl, 3, 4, "http://t.me/"}});
+  check_parse_markdown_v3("__asd[ab__cd](t.me)", "asdabcd",
+                          {{td::MessageEntity::Type::Italic, 0, 3},
+                           {td::MessageEntity::Type::TextUrl, 3, 4, "http://t.me/"},
+                           {td::MessageEntity::Type::Italic, 3, 2}},
+                          true);
+  check_parse_markdown_v3("__a #test__test", "__a #test__test", {});
+  check_parse_markdown_v3("a #testtest", {{td::MessageEntity::Type::Italic, 0, 7}}, "a #testtest",
+                          {{td::MessageEntity::Type::Italic, 0, 7}});
+
+  // TODO parse_markdown_v3 is not idempotent now, which is bad
+  check_parse_markdown_v3(
+      "~~**~~__**a__", {{td::MessageEntity::Type::Strikethrough, 2, 1}, {td::MessageEntity::Type::Bold, 6, 1}},
+      "**__**a__", {{td::MessageEntity::Type::Strikethrough, 0, 2}, {td::MessageEntity::Type::Bold, 2, 1}}, true);
+  check_parse_markdown_v3("**__**a__",
+                          {{td::MessageEntity::Type::Strikethrough, 0, 2}, {td::MessageEntity::Type::Bold, 2, 1}},
+                          "__a__", {{td::MessageEntity::Type::Bold, 0, 2}}, true);
+  check_parse_markdown_v3("__a__", {{td::MessageEntity::Type::Bold, 0, 2}}, "a",
+                          {{td::MessageEntity::Type::Italic, 0, 1}}, true);
+  check_parse_markdown_v3("~~__~~#test__test", "__#test__test", {{td::MessageEntity::Type::Strikethrough, 0, 2}});
+  check_parse_markdown_v3("__#test__test", {{td::MessageEntity::Type::Strikethrough, 0, 2}}, "#testtest",
+                          {{td::MessageEntity::Type::Italic, 0, 5}});
+
+  check_parse_markdown_v3(
+      "~~**~~||**a||", {{td::MessageEntity::Type::Strikethrough, 2, 1}, {td::MessageEntity::Type::Bold, 6, 1}},
+      "**||**a||", {{td::MessageEntity::Type::Strikethrough, 0, 2}, {td::MessageEntity::Type::Bold, 2, 1}}, true);
+  check_parse_markdown_v3("**||**a||",
+                          {{td::MessageEntity::Type::Strikethrough, 0, 2}, {td::MessageEntity::Type::Bold, 2, 1}},
+                          "||a||", {{td::MessageEntity::Type::Bold, 0, 2}}, true);
+  check_parse_markdown_v3("||a||", {{td::MessageEntity::Type::Bold, 0, 2}}, "a",
+                          {{td::MessageEntity::Type::Spoiler, 0, 1}}, true);
+  check_parse_markdown_v3("~~||~~#test||test", "#testtest", {{td::MessageEntity::Type::Spoiler, 0, 5}});
+  check_parse_markdown_v3("||#test||test", {{td::MessageEntity::Type::Strikethrough, 0, 2}}, "#testtest",
+                          {{td::MessageEntity::Type::Spoiler, 0, 5}});
+
+  check_parse_markdown_v3("__[ab_](t.me)_", "__ab__", {{td::MessageEntity::Type::TextUrl, 2, 3, "http://t.me/"}});
+  check_parse_markdown_v3(
+      "__[ab__](t.me)_", "ab_",
+      {{td::MessageEntity::Type::TextUrl, 0, 2, "http://t.me/"}, {td::MessageEntity::Type::Italic, 0, 2}});
+  check_parse_markdown_v3("__[__ab__](t.me)__", "____ab____",
+                          {{td::MessageEntity::Type::TextUrl, 2, 6, "http://t.me/"}});
+  check_parse_markdown_v3(
+      "__[__ab__](t.me)a__", "____aba",
+      {{td::MessageEntity::Type::TextUrl, 2, 4, "http://t.me/"}, {td::MessageEntity::Type::Italic, 6, 1}});
+  check_parse_markdown_v3("`a` __ab__", {{td::MessageEntity::Type::Bold, 6, 3}}, "a __ab__",
+                          {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Bold, 4, 3}});
+  check_parse_markdown_v3("`a` __ab__", {{td::MessageEntity::Type::Underline, 5, 1}}, "a __ab__",
+                          {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Underline, 3, 1}});
+
+  check_parse_markdown_v3("||[ab|](t.me)|", "||ab||", {{td::MessageEntity::Type::TextUrl, 2, 3, "http://t.me/"}});
+  check_parse_markdown_v3(
+      "||[ab||](t.me)|", "ab|",
+      {{td::MessageEntity::Type::TextUrl, 0, 2, "http://t.me/"}, {td::MessageEntity::Type::Spoiler, 0, 2}});
+  check_parse_markdown_v3("||[||ab||](t.me)||", "||||ab||||",
+                          {{td::MessageEntity::Type::TextUrl, 2, 6, "http://t.me/"}});
+  check_parse_markdown_v3(
+      "||[||ab||](t.me)a||", "||||aba",
+      {{td::MessageEntity::Type::TextUrl, 2, 4, "http://t.me/"}, {td::MessageEntity::Type::Spoiler, 6, 1}});
+  check_parse_markdown_v3("`a` ||ab||", {{td::MessageEntity::Type::Bold, 6, 3}}, "a ||ab||",
+                          {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Bold, 4, 3}});
+  check_parse_markdown_v3("`a` ||ab||", {{td::MessageEntity::Type::Underline, 5, 1}}, "a ||ab||",
+                          {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Underline, 3, 1}});
+
+  check_parse_markdown_v3("`a` @test__test__test", "a @test__test__test", {{td::MessageEntity::Type::Code, 0, 1}});
+  check_parse_markdown_v3("`a` #test__test__test", "a #test__test__test", {{td::MessageEntity::Type::Code, 0, 1}});
+  check_parse_markdown_v3("`a` __@test_test_test__", "a @test_test_test",
+                          {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Italic, 2, 15}});
+  check_parse_markdown_v3("`a` __#test_test_test__", "a #test_test_test",
+                          {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Italic, 2, 15}});
+  check_parse_markdown_v3("[a](t.me) __@test**test**test__", "a @testtesttest",
+                          {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"},
+                           {td::MessageEntity::Type::Italic, 2, 13},
+                           {td::MessageEntity::Type::Bold, 7, 4}});
+  check_parse_markdown_v3("[a](t.me) __#test~~test~~test__", "a #testtesttest",
+                          {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"},
+                           {td::MessageEntity::Type::Italic, 2, 13},
+                           {td::MessageEntity::Type::Strikethrough, 7, 4}});
+  check_parse_markdown_v3("[a](t.me) __@test__test__test__", "a @testtesttest",
+                          {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"},
+                           {td::MessageEntity::Type::Italic, 2, 5},
+                           {td::MessageEntity::Type::Italic, 11, 4}});
+  check_parse_markdown_v3("__**~~__gh**~~", "gh",
+                          {{td::MessageEntity::Type::Bold, 0, 2}, {td::MessageEntity::Type::Strikethrough, 0, 2}});
+  check_parse_markdown_v3("__ab**cd~~ef__gh**ij~~", "abcdefghij",
+                          {{td::MessageEntity::Type::Italic, 0, 6},
+                           {td::MessageEntity::Type::Bold, 2, 6},
+                           {td::MessageEntity::Type::Strikethrough, 4, 6}});
+  check_parse_markdown_v3("__ab**cd~~ef||gh__ij**kl~~mn||", "abcdefghijklmn",
+                          {{td::MessageEntity::Type::Italic, 0, 2},
+                           {td::MessageEntity::Type::Bold, 2, 2},
+                           {td::MessageEntity::Type::Italic, 2, 2},
+                           {td::MessageEntity::Type::Bold, 4, 2},
+                           {td::MessageEntity::Type::Italic, 4, 2},
+                           {td::MessageEntity::Type::Strikethrough, 4, 2},
+                           {td::MessageEntity::Type::Spoiler, 6, 8},
+                           {td::MessageEntity::Type::Strikethrough, 6, 6},
+                           {td::MessageEntity::Type::Bold, 6, 4},
+                           {td::MessageEntity::Type::Italic, 6, 2}},
+                          true);
+  check_parse_markdown_v3("__ab**[cd~~ef__](t.me)gh**ij~~", "abcdefghij",
+                          {{td::MessageEntity::Type::Italic, 0, 6},
+                           {td::MessageEntity::Type::Bold, 2, 6},
+                           {td::MessageEntity::Type::TextUrl, 2, 4, "http://t.me/"},
+                           {td::MessageEntity::Type::Strikethrough, 4, 6}});
+  check_parse_markdown_v3("__ab**[cd~~e](t.me)f__gh**ij~~", "abcdefghij",
+                          {{td::MessageEntity::Type::Italic, 0, 6},
+                           {td::MessageEntity::Type::Bold, 2, 6},
+                           {td::MessageEntity::Type::TextUrl, 2, 3, "http://t.me/"},
+                           {td::MessageEntity::Type::Strikethrough, 4, 6}});
+  check_parse_markdown_v3("__ab**[cd~~](t.me)ef__gh**ij~~", "abcdefghij",
+                          {{td::MessageEntity::Type::Italic, 0, 6},
+                           {td::MessageEntity::Type::Bold, 2, 6},
+                           {td::MessageEntity::Type::TextUrl, 2, 2, "http://t.me/"},
+                           {td::MessageEntity::Type::Strikethrough, 4, 6}});
+  check_parse_markdown_v3("[__**bold italic link**__](example.com)", "bold italic link",
+                          {{td::MessageEntity::Type::TextUrl, 0, 16, "http://example.com/"},
+                           {td::MessageEntity::Type::Bold, 0, 16},
+                           {td::MessageEntity::Type::Italic, 0, 16}});
+  check_parse_markdown_v3(
+      "__italic__ ~~strikethrough~~ **bold** `code` ```pre``` __[italic__ text_url](telegram.org) __italic**bold "
+      "italic__bold**__italic__ ~~strikethrough~~ **bold** `code` ```pre``` __[italic__ text_url](telegram.org) "
+      "__italic**bold italic__bold** ||spoiler||",
+      "italic strikethrough bold code pre italic text_url italicbold italicbolditalic strikethrough bold code pre "
+      "italic text_url italicbold italicbold spoiler",
+      {{td::MessageEntity::Type::Italic, 0, 6},
+       {td::MessageEntity::Type::Strikethrough, 7, 13},
+       {td::MessageEntity::Type::Bold, 21, 4},
+       {td::MessageEntity::Type::Code, 26, 4},
+       {td::MessageEntity::Type::Pre, 31, 3},
+       {td::MessageEntity::Type::TextUrl, 35, 15, "http://telegram.org/"},
+       {td::MessageEntity::Type::Italic, 35, 6},
+       {td::MessageEntity::Type::Italic, 51, 17},
+       {td::MessageEntity::Type::Bold, 57, 15},
+       {td::MessageEntity::Type::Italic, 72, 6},
+       {td::MessageEntity::Type::Strikethrough, 79, 13},
+       {td::MessageEntity::Type::Bold, 93, 4},
+       {td::MessageEntity::Type::Code, 98, 4},
+       {td::MessageEntity::Type::Pre, 103, 3},
+       {td::MessageEntity::Type::TextUrl, 107, 15, "http://telegram.org/"},
+       {td::MessageEntity::Type::Italic, 107, 6},
+       {td::MessageEntity::Type::Italic, 123, 17},
+       {td::MessageEntity::Type::Bold, 129, 15},
+       {td::MessageEntity::Type::Spoiler, 145, 7}});
+
+  td::vector<td::string> parts{"a", " #test__a", "__", "**", "~~", "||", "[", "](t.me)", "`"};
+  td::vector<td::MessageEntity::Type> types{
+      td::MessageEntity::Type::Bold,          td::MessageEntity::Type::Italic,  td::MessageEntity::Type::Underline,
+      td::MessageEntity::Type::Strikethrough, td::MessageEntity::Type::Spoiler, td::MessageEntity::Type::Code,
+      td::MessageEntity::Type::Pre,           td::MessageEntity::Type::PreCode, td::MessageEntity::Type::TextUrl,
+      td::MessageEntity::Type::MentionName,   td::MessageEntity::Type::Cashtag};
+  for (size_t test_n = 0; test_n < 1000; test_n++) {
+    td::string str;
+    int part_n = td::Random::fast(1, 200);
+    for (int i = 0; i < part_n; i++) {
+      str += parts[td::Random::fast(0, static_cast<int>(parts.size()) - 1)];
+    }
+    td::vector<td::MessageEntity> entities;
+    int entity_n = td::Random::fast(1, 20);
+    for (int i = 0; i < entity_n; i++) {
+      auto type = types[td::Random::fast(0, static_cast<int>(types.size()) - 1)];
+      td::int32 offset = td::Random::fast(0, static_cast<int>(str.size()) - 1);
+      auto max_length = static_cast<int>(str.size() - offset);
+      if ((test_n & 1) != 0 && max_length > 4) {
+        max_length = 4;
+      }
+      td::int32 length = td::Random::fast(0, max_length);
+      entities.emplace_back(type, offset, length);
+    }
+
+    td::FormattedText text{std::move(str), std::move(entities)};
+    while (true) {
+      ASSERT_TRUE(td::fix_formatted_text(text.text, text.entities, true, true, true, true, true).is_ok());
+      auto parsed_text = td::parse_markdown_v3(text);
+      ASSERT_TRUE(td::fix_formatted_text(parsed_text.text, parsed_text.entities, true, true, true, true, true).is_ok());
+      if (parsed_text == text) {
+        break;
+      }
+      text = std::move(parsed_text);
+    }
+    ASSERT_EQ(text, td::parse_markdown_v3(text));
+    auto markdown_text = td::get_markdown_v3(text);
+    ASSERT_TRUE(text == markdown_text || text == td::parse_markdown_v3(markdown_text));
+  }
+}
+
+static void check_get_markdown_v3(const td::string &result_text, const td::vector<td::MessageEntity> &result_entities,
+                                  td::string text, td::vector<td::MessageEntity> entities) {
+  auto markdown_text = td::get_markdown_v3({std::move(text), std::move(entities)});
+  ASSERT_STREQ(result_text, markdown_text.text);
+  ASSERT_EQ(result_entities, markdown_text.entities);
+}
+
+TEST(MessageEntities, get_markdown_v3) {
+  check_get_markdown_v3("``` ```", {}, " ", {{td::MessageEntity::Type::Pre, 0, 1}});
+  check_get_markdown_v3("` `", {}, " ", {{td::MessageEntity::Type::Code, 0, 1}});
+  check_get_markdown_v3("`\n`", {}, "\n", {{td::MessageEntity::Type::Code, 0, 1}});
+  check_get_markdown_v3("ab", {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Pre, 1, 1}}, "ab",
+                        {{td::MessageEntity::Type::Code, 0, 1}, {td::MessageEntity::Type::Pre, 1, 1}});
+
+  check_get_markdown_v3("[ ](http://t.me/)", {}, " ", {{td::MessageEntity::Type::TextUrl, 0, 1, "http://t.me/"}});
+  check_get_markdown_v3(
+      "[ ]t.me[)](http://t.me/) [ ](t.me)", {{25, 1, td::UserId(static_cast<td::int64>(1))}}, "[ ]t.me) [ ](t.me)",
+      {{td::MessageEntity::Type::TextUrl, 7, 1, "http://t.me/"}, {9, 1, td::UserId(static_cast<td::int64>(1))}});
+
+  check_get_markdown_v3("__ __", {}, " ", {{td::MessageEntity::Type::Italic, 0, 1}});
+  check_get_markdown_v3("** **", {}, " ", {{td::MessageEntity::Type::Bold, 0, 1}});
+  check_get_markdown_v3("~~ ~~", {}, " ", {{td::MessageEntity::Type::Strikethrough, 0, 1}});
+  check_get_markdown_v3("|| ||", {}, " ", {{td::MessageEntity::Type::Spoiler, 0, 1}});
+  check_get_markdown_v3("__a__ **b** ~~c~~ ||d|| e", {{td::MessageEntity::Type::PreCode, 24, 1, "C++"}}, "a b c d e",
+                        {{td::MessageEntity::Type::Italic, 0, 1},
+                         {td::MessageEntity::Type::Bold, 2, 1},
+                         {td::MessageEntity::Type::Strikethrough, 4, 1},
+                         {td::MessageEntity::Type::Spoiler, 6, 1},
+                         {td::MessageEntity::Type::PreCode, 8, 1, "C++"}});
+  check_get_markdown_v3("`ab` ```cd``` ef", {{td::MessageEntity::Type::PreCode, 14, 2, "C++"}}, "ab cd ef",
+                        {{td::MessageEntity::Type::Code, 0, 2},
+                         {td::MessageEntity::Type::Pre, 3, 2},
+                         {td::MessageEntity::Type::PreCode, 6, 2, "C++"}});
+  check_get_markdown_v3("__asd__[__ab__cd](http://t.me/)", {}, "asdabcd",
+                        {{td::MessageEntity::Type::Italic, 0, 3},
+                         {td::MessageEntity::Type::TextUrl, 3, 4, "http://t.me/"},
+                         {td::MessageEntity::Type::Italic, 3, 2}});
+
+  check_get_markdown_v3("__ab", {{td::MessageEntity::Type::Italic, 3, 1}}, "__ab",
+                        {{td::MessageEntity::Type::Italic, 3, 1}});
+  check_get_markdown_v3("__ab__**__cd__**~~**__ef__gh**ij~~", {}, "abcdefghij",
+                        {{td::MessageEntity::Type::Italic, 0, 2},
+                         {td::MessageEntity::Type::Bold, 2, 2},
+                         {td::MessageEntity::Type::Italic, 2, 2},
+                         {td::MessageEntity::Type::Strikethrough, 4, 6},
+                         {td::MessageEntity::Type::Bold, 4, 4},
+                         {td::MessageEntity::Type::Italic, 4, 2}});
+  check_get_markdown_v3("[**__bold italic link__**](http://example.com/)", {}, "bold italic link",
+                        {{td::MessageEntity::Type::TextUrl, 0, 16, "http://example.com/"},
+                         {td::MessageEntity::Type::Bold, 0, 16},
+                         {td::MessageEntity::Type::Italic, 0, 16}});
 }
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