4 libtap - Write tests in C
14 is("fnord", "eek", "two different strings not that way?");
15 ok(3 <= 8732, "%d <= %d", 3, 8732);
16 like("fnord", "f(yes|no)r*[a-f]$");
25 not ok 2 - two different strings not that way?
26 # Failed test 'two different strings not that way?'
27 # at t/synopsis.c line 7.
33 # Failed test at t/synopsis.c line 10.
37 # Looks like you failed 2 tests of 5 run.
42 tap is an easy to read and easy to write way of creating tests for
43 your software. This library creates functions that can be used to
44 generate it for your C programs. It is implemented using macros
45 that include file and line info automatically, and makes it so that
46 the format message of each test is optional. It is mostly based on
47 the Test::More Perl module.
57 For more detailed installation instructions (eg, for **Windows**), see `INSTALL`.
65 - plan(SKIP_ALL, fmt, ...)
67 Use this to start a series of tests. When you know how many tests there
68 will be, you can put a number as a number of tests you expect to run. If
69 you do not know how many tests there will be, you can use plan(NO_PLAN)
70 or not call this function. When you pass it a number of tests to run, a
71 message similar to the following will appear in the output:
75 If you pass it SKIP_ALL, the whole test will be skipped.
80 Specify a test. the test can be any statement returning a true or false
81 value. You may optionally pass a format string describing the test.
83 ok(r = reader_new("Of Mice and Men"), "create a new reader");
84 ok(reader_go_to_page(r, 55), "can turn the page");
85 ok(r->page == 55, "page turned to the right one");
89 ok 1 - create a new reader
90 ok 2 - can turn the page
91 ok 3 - page turned to the right one
93 On failure, a diagnostic message will be printed out.
95 not ok 3 - page turned to the right one
96 # Failed test 'page turned to the right one'
97 # at reader.c line 13.
100 - is(got, expected, fmt, ...)
101 - isnt(got, unexpected)
102 - isnt(got, unexpected, fmt, ...)
104 Tests that the string you got is what you expected. with isnt, it is the
107 is("this", "that", "this is that");
111 not ok 1 - this is that
112 # Failed test 'this is that'
118 - cmp_ok(a, op, b, fmt, ...)
120 Compares two ints with any binary operator that doesn't require an lvalue.
121 This is nice to use since it provides a better error message than an
124 cmp_ok(420, ">", 666);
129 # Failed test at cmpok.c line 5.
134 - cmp_mem(got, expected, n)
135 - cmp_mem(got, expected, n, fmt, ...)
137 Tests that the first n bytes of the memory you got is what you expected.
138 NULL pointers for got and expected are handled (if either is NULL,
139 the test fails), but you need to ensure n is not too large.
148 # Failed test at t/cmp_mem.c line 9.
149 # Difference starts at offset 0
153 - like(got, expected)
154 - like(got, expected, fmt, ...)
155 - unlike(got, unexpected)
156 - unlike(got, unexpected, fmt, ...)
158 Tests that the string you got matches the expected extended POSIX regex.
159 unlike is the reverse. These macros are the equivalent of a skip on
162 like("stranger", "^s.(r).*\\1$", "matches the regex");
166 ok 1 - matches the regex
173 Speciy that a test succeeded or failed. Use these when the statement is
174 longer than you can fit into the argument given to an ok() test.
177 - dies_ok(code, fmt, ...)
179 - lives_ok(code, fmt, ...)
181 Tests whether the given code causes your program to exit. The code gets
182 passed to a macro that will test it in a forked process. If the code
183 succeeds it will be executed in the parent process. You can test things
184 like passing a function a null pointer and make sure it doesnt
185 dereference it and crash.
187 dies_ok({abort();}, "abort does close your program");
188 dies_ok({int x = 0/0;}, "divide by zero crash");
189 lives_ok({pow(3.0, 5.0);}, "nothing wrong with taking 3**5");
191 On Windows, these macros are the equivalent of a skip.
195 Summarizes the tests that occurred and exits the main function. If
196 there was no plan, it will print out the number of tests as.
200 It will also print a diagnostic message about how many
203 # Looks like you failed 2 tests of 3 run.
205 If all planned tests were successful, it will return 0. If any
206 test fails, it will return 1. If they all passed, but there
207 were missing tests, it will return 2.
211 print out a message to the tap output on stdout. Each line is
212 preceeded by a "# " so that you know its a diagnostic message.
214 diag("This is\na diag\nto describe\nsomething.");
223 ok() and this function return an int so you can use it like:
225 ok(0) || diag("doh!");
228 - skip(test, n, fmt, ...)
231 Skip a series of n tests if test is true. You may give a reason why you are
232 skipping them or not. The (possibly) skipped tests must occur between the
233 skip and end_skip macros.
249 Specifies a series of tests that you expect to fail because they are not
259 # Failed (TODO) test at todo.c line 7
264 Immediately stops all testing.
266 BAIL_OUT("Can't go no further");
270 Bail out! Can't go no further