4 libtap - Write tests in C
11 int foo () {return 3;}
12 char *bar () {return "fnord";}
18 ok(foo() <= 8732, "foo <= %d", 8732);
19 like(bar(), "f(yes|no)r*[a-f]$", "is like");
28 # Failed test at main.c line 7.
33 # Looks like you failed 1 test of 4 run.
39 tap is an easy to read and easy to write way of creating tests for your
40 software. This library creates functions that can be used to generate it for
41 your C programs. It is mostly based on the Test::More Perl module.
49 Use this to start a series of tests. When you know how many tests there
50 will be, you can put a number as a number of tests you expect to run. If
51 you do not know how many tests there will be, you can use plan(NO_PLAN)
52 or not call this function. When you pass it a number of tests to run, a
53 message similar to the following will appear in the output:
60 Specify a test. the test can be any statement returning a true or false
61 value. You may optionally pass a format string describing the test.
63 ok(r = reader_new("Of Mice and Men"), "create a new reader");
64 ok(reader_go_to_page(r, 55), "can turn the page");
65 ok(r->page == 55, "page turned to the right one");
69 ok 1 - create a new reader
70 ok 2 - can turn the page
71 ok 3 - page turned to the right one
73 On failure, a diagnostic message will be printed out.
75 not ok 3 - page turned to the right one
76 # Failed test 'page turned to the right one'
77 # at reader.c line 13.
80 - is(got, expected, fmt, ...)
82 - isnt(got, expected, fmt, ...)
84 Tests that the string you got is what you expected. with isnt, it is the
87 is("this", "that", "this is that");
91 not ok 1 - this is that
92 # Failed test 'this is that'
98 - cmp_ok(a, op, b, fmt, ...)
100 Compares two ints with any binary operator that doesn't require an lvalue.
101 This is nice to use since it provides a better error message than an
104 cmp_ok(420, ">", 666);
109 # Failed test at cmpok.c line 5.
114 - like(got, expected)
115 - like(got, expected, fmt, ...)
116 - unlike(got, expected)
117 - unlike(got, expected, fmt, ...)
119 Tests that the string you got matches the expected extended POSIX regex.
120 unlike is the reverse. These macros are the equivalent of a skip on
123 like("stranger", "^s.(r).*\\1$", "matches the regex");
127 ok 1 - matches the regex
134 Speciy that a test succeeded or failed. Use these when the statement is
135 longer than you can fit into the argument given to an ok() test.
138 - dies_ok(code, fmt, ...)
140 - lives_ok(code, fmt, ...)
142 Tests whether the given code causes your program to exit. The code gets
143 passed to a macro that will test it in a forked process. If the code
144 succeeds it will be executed in the parent process. You can test things
145 like passing a function a null pointer and make sure it doesnt
146 dereference it and crash.
148 dies_ok({abort();}, "abort does close your program");
149 dies_ok({int x = 0/0;}, "divide by zero crash");
150 lives ok({pow(3.0, 5.0)}, "nothing wrong with taking 3**5");
152 On Windows, these macros are the equivalent of a skip.
156 Summarizes the tests that occurred. If there was no plan, it will print
157 out the number of tests as.
161 It will also print a diagnostic message about how many
164 # Looks like you failed 2 tests of 3 run.
166 If all planned tests were successful, it will return 0. If any test fails,
167 it will return the number of failed tests (including ones that were
168 missing). If they all passed, but there were missing tests, it will return
174 print out a message to the tap output. note prints to stdout and diag
175 prints to stderr. Each line is preceeded by a "# " so that you know its a
178 note("This is\na note\nto describe\nsomething.");
187 ok() and these functions return ints so you can use them like:
189 ok(1) && note("yo!");
190 ok(0) || diag("I have no idea what just happened");
193 - skip(test, n, fmt, ...)
196 Skip a series of n tests if test is true. You may give a reason why you are
197 skipping them or not. The (possibly) skipped tests must occur between the
198 skip and endskip macros.
214 Specifies a series of tests that you expect to fail because they are not
224 # Failed (TODO) test at todo.c line 7