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Diffstat (limited to 'libs/libevent/docs/test/tinytest_demo.c')
| -rw-r--r-- | libs/libevent/docs/test/tinytest_demo.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/libs/libevent/docs/test/tinytest_demo.c b/libs/libevent/docs/test/tinytest_demo.c new file mode 100644 index 0000000000..f6bfd66a1a --- /dev/null +++ b/libs/libevent/docs/test/tinytest_demo.c @@ -0,0 +1,262 @@ +/* tinytest_demo.c -- Copyright 2009-2012 Nick Mathewson + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + + +/* Welcome to the example file for tinytest! I'll show you how to set up + * some simple and not-so-simple testcases. */ + +/* Make sure you include these headers. */ +#include "tinytest.h" +#include "tinytest_macros.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <time.h> +#ifdef _WIN32 +#include <windows.h> +#else +#include <unistd.h> +#endif + +/* ============================================================ */ + +/* First, let's see if strcmp is working. (All your test cases should be + * functions declared to take a single void * as an argument.) */ +void +test_strcmp(void *data) +{ + (void)data; /* This testcase takes no data. */ + + /* Let's make sure the empty string is equal to itself */ + if (strcmp("","")) { + /* This macro tells tinytest to stop the current test + * and go straight to the "end" label. */ + tt_abort_msg("The empty string was not equal to itself"); + } + + /* Pretty often, calling tt_abort_msg to indicate failure is more + heavy-weight than you want. Instead, just say: */ + tt_assert(strcmp("testcase", "testcase") == 0); + + /* Occasionally, you don't want to stop the current testcase just + because a single assertion has failed. In that case, use + tt_want: */ + tt_want(strcmp("tinytest", "testcase") > 0); + + /* You can use the tt_*_op family of macros to compare values and to + fail unless they have the relationship you want. They produce + more useful output than tt_assert, since they display the actual + values of the failing things. + + Fail unless strcmp("abc, "abc") == 0 */ + tt_int_op(strcmp("abc", "abc"), ==, 0); + + /* Fail unless strcmp("abc, "abcd") is less than 0 */ + tt_int_op(strcmp("abc", "abcd"), < , 0); + + /* Incidentally, there's a test_str_op that uses strcmp internally. */ + tt_str_op("abc", <, "abcd"); + + + /* Every test-case function needs to finish with an "end:" + label and (optionally) code to clean up local variables. */ + end: + ; +} + +/* ============================================================ */ + +/* Now let's mess with setup and teardown functions! These are handy if + you have a bunch of tests that all need a similar environment, and you + want to reconstruct that environment freshly for each one. */ + +/* First you declare a type to hold the environment info, and functions to + set it up and tear it down. */ +struct data_buffer { + /* We're just going to have couple of character buffer. Using + setup/teardown functions is probably overkill for this case. + + You could also do file descriptors, complicated handles, temporary + files, etc. */ + char buffer1[512]; + char buffer2[512]; +}; +/* The setup function needs to take a const struct testcase_t and return + void* */ +void * +setup_data_buffer(const struct testcase_t *testcase) +{ + struct data_buffer *db = malloc(sizeof(struct data_buffer)); + + /* If you had a complicated set of setup rules, you might behave + differently here depending on testcase->flags or + testcase->setup_data or even or testcase->name. */ + + /* Returning a NULL here would mean that we couldn't set up for this + test, so we don't need to test db for null. */ + return db; +} +/* The clean function deallocates storage carefully and returns true on + success. */ +int +clean_data_buffer(const struct testcase_t *testcase, void *ptr) +{ + struct data_buffer *db = ptr; + + if (db) { + free(db); + return 1; + } + return 0; +} +/* Finally, declare a testcase_setup_t with these functions. */ +struct testcase_setup_t data_buffer_setup = { + setup_data_buffer, clean_data_buffer +}; + + +/* Now let's write our test. */ +void +test_memcpy(void *ptr) +{ + /* This time, we use the argument. */ + struct data_buffer *db = ptr; + + /* We'll also introduce a local variable that might need cleaning up. */ + char *mem = NULL; + + /* Let's make sure that memcpy does what we'd like. */ + strcpy(db->buffer1, "String 0"); + memcpy(db->buffer2, db->buffer1, sizeof(db->buffer1)); + tt_str_op(db->buffer1, ==, db->buffer2); + + /* This one works if there's an internal NUL. */ + tt_mem_op(db->buffer1, <, db->buffer2, sizeof(db->buffer1)); + + /* Now we've allocated memory that's referenced by a local variable. + The end block of the function will clean it up. */ + mem = strdup("Hello world."); + tt_assert(mem); + + /* Another rather trivial test. */ + tt_str_op(db->buffer1, !=, mem); + + end: + /* This time our end block has something to do. */ + if (mem) + free(mem); +} + +void +test_timeout(void *ptr) +{ + time_t t1, t2; + (void)ptr; + t1 = time(NULL); +#ifdef _WIN32 + Sleep(5000); +#else + sleep(5); +#endif + t2 = time(NULL); + + tt_int_op(t2-t1, >=, 4); + + tt_int_op(t2-t1, <=, 6); + + end: + ; +} + +/* ============================================================ */ + +/* Now we need to make sure that our tests get invoked. First, you take + a bunch of related tests and put them into an array of struct testcase_t. +*/ + +struct testcase_t demo_tests[] = { + /* Here's a really simple test: it has a name you can refer to it + with, and a function to invoke it. */ + { "strcmp", test_strcmp, }, + + /* The second test has a flag, "TT_FORK", to make it run in a + subprocess, and a pointer to the testcase_setup_t that configures + its environment. */ + { "memcpy", test_memcpy, TT_FORK, &data_buffer_setup }, + + /* This flag is off-by-default, since it takes a while to run. You + * can enable it manually by passing +demo/timeout at the command line.*/ + { "timeout", test_timeout, TT_OFF_BY_DEFAULT }, + + /* The array has to end with END_OF_TESTCASES. */ + END_OF_TESTCASES +}; + +/* Next, we make an array of testgroups. This is mandatory. Unlike more + heavy-duty testing frameworks, groups can't nest. */ +struct testgroup_t groups[] = { + + /* Every group has a 'prefix', and an array of tests. That's it. */ + { "demo/", demo_tests }, + + END_OF_GROUPS +}; + +/* We can also define test aliases. These can be used for types of tests that + * cut across groups. */ +const char *alltests[] = { "+..", NULL }; +const char *slowtests[] = { "+demo/timeout", NULL }; +struct testlist_alias_t aliases[] = { + + { "ALL", alltests }, + { "SLOW", slowtests }, + + END_OF_ALIASES +}; + + +int +main(int c, const char **v) +{ + /* Finally, just call tinytest_main(). It lets you specify verbose + or quiet output with --verbose and --quiet. You can list + specific tests: + + tinytest-demo demo/memcpy + + or use a ..-wildcard to select multiple tests with a common + prefix: + + tinytest-demo demo/.. + + If you list no tests, you get them all by default, so that + "tinytest-demo" and "tinytest-demo .." mean the same thing. + + */ + tinytest_set_aliases(aliases); + return tinytest_main(c, v, groups); +} |