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 your
43 software. This library creates functions that can be used to generate it for
44 your C programs. It is mostly based on the Test::More Perl module.
54 For more detailed installation instructions (eg, for **Windows**), see `INSTALL`.
62 - plan(SKIP_ALL, fmt, ...)
64 Use this to start a series of tests. When you know how many tests there
65 will be, you can put a number as a number of tests you expect to run. If
66 you do not know how many tests there will be, you can use plan(NO_PLAN)
67 or not call this function. When you pass it a number of tests to run, a
68 message similar to the following will appear in the output:
72 If you pass it SKIP_ALL, the whole test will be skipped.
77 Specify a test. the test can be any statement returning a true or false
78 value. You may optionally pass a format string describing the test.
80 ok(r = reader_new("Of Mice and Men"), "create a new reader");
81 ok(reader_go_to_page(r, 55), "can turn the page");
82 ok(r->page == 55, "page turned to the right one");
86 ok 1 - create a new reader
87 ok 2 - can turn the page
88 ok 3 - page turned to the right one
90 On failure, a diagnostic message will be printed out.
92 not ok 3 - page turned to the right one
93 # Failed test 'page turned to the right one'
94 # at reader.c line 13.
97 - is(got, expected, fmt, ...)
98 - isnt(got, unexpected)
99 - isnt(got, unexpected, fmt, ...)
101 Tests that the string you got is what you expected. with isnt, it is the
104 is("this", "that", "this is that");
108 not ok 1 - this is that
109 # Failed test 'this is that'
115 - cmp_ok(a, op, b, fmt, ...)
117 Compares two ints with any binary operator that doesn't require an lvalue.
118 This is nice to use since it provides a better error message than an
121 cmp_ok(420, ">", 666);
126 # Failed test at cmpok.c line 5.
131 - cmp_mem(got, expected, n)
132 - cmp_mem(got, expected, n, fmt, ...)
134 Tests that the first n bytes of the memory you got is what you expected.
135 NULL pointers for got and expected are handled (if either is NULL,
136 the test fails), but you need to ensure n is not too large.
145 # Failed test at t/cmp_mem.c line 9.
146 # Difference starts at offset 0
150 - like(got, expected)
151 - like(got, expected, fmt, ...)
152 - unlike(got, unexpected)
153 - unlike(got, unexpected, fmt, ...)
155 Tests that the string you got matches the expected extended POSIX regex.
156 unlike is the reverse. These macros are the equivalent of a skip on
159 like("stranger", "^s.(r).*\\1$", "matches the regex");
163 ok 1 - matches the regex
170 Speciy that a test succeeded or failed. Use these when the statement is
171 longer than you can fit into the argument given to an ok() test.
174 - dies_ok(code, fmt, ...)
176 - lives_ok(code, fmt, ...)
178 Tests whether the given code causes your program to exit. The code gets
179 passed to a macro that will test it in a forked process. If the code
180 succeeds it will be executed in the parent process. You can test things
181 like passing a function a null pointer and make sure it doesnt
182 dereference it and crash.
184 dies_ok({abort();}, "abort does close your program");
185 dies_ok({int x = 0/0;}, "divide by zero crash");
186 lives_ok({pow(3.0, 5.0);}, "nothing wrong with taking 3**5");
188 On Windows, these macros are the equivalent of a skip.
192 Summarizes the tests that occurred and exits the main function. If
193 there was no plan, it will print out the number of tests as.
197 It will also print a diagnostic message about how many
200 # Looks like you failed 2 tests of 3 run.
202 If all planned tests were successful, it will return 0. If any
203 test fails, it will return 1. If they all passed, but there
204 were missing tests, it will return 2.
208 print out a message to the tap output on stdout. Each line is
209 preceeded by a "# " so that you know its a diagnostic message.
211 diag("This is\na diag\nto describe\nsomething.");
220 ok() and this function return an int so you can use it like:
222 ok(0) || diag("doh!");
225 - skip(test, n, fmt, ...)
228 Skip a series of n tests if test is true. You may give a reason why you are
229 skipping them or not. The (possibly) skipped tests must occur between the
230 skip and end_skip macros.
246 Specifies a series of tests that you expect to fail because they are not
256 # Failed (TODO) test at todo.c line 7
261 Immediately stops all testing.
263 BAIL_OUT("Can't go no further");
267 Bail out! Can't go no further