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enum | GTestFileType |
enum | GTestTrapFlags |
enum | GTestSubprocessFlags |
typedef | GTestCase |
typedef | GTestSuite |
GLib provides a framework for writing and maintaining unit tests in parallel to the code they are testing. The API is designed according to established concepts found in the other test frameworks (JUnit, NUnit, RUnit), which in turn is based on smalltalk unit testing concepts.
Test case: Tests (test methods) are grouped together with their fixture into test cases.
Fixture: A test fixture consists of fixture data and setup and teardown methods to establish the environment for the test functions. We use fresh fixtures, i.e. fixtures are newly set up and torn down around each test invocation to avoid dependencies between tests.
Test suite: Test cases can be grouped into test suites, to allow subsets of the available tests to be run. Test suites can be grouped into other test suites as well.
The API is designed to handle creation and registration of test suites and test cases implicitly. A simple call like
1 |
g_test_add_func ("/misc/assertions", test_assertions); |
creates a test suite called "misc" with a single test case named "assertions", which consists of running the test_assertions function.
In addition to the traditional g_assert()
, the test framework provides
an extended set of assertions for comparisons: g_assert_cmpfloat()
,
g_assert_cmpint()
, g_assert_cmpuint()
, g_assert_cmphex()
,
g_assert_cmpstr()
, and g_assert_cmpmem()
. The advantage of these
variants over plain g_assert()
is that the assertion messages can be
more elaborate, and include the values of the compared entities.
A full example of creating a test suite with two tests using fixtures:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 |
#include <glib.h> #include <locale.h> typedef struct { MyObject *obj; OtherObject *helper; } MyObjectFixture; static void my_object_fixture_set_up (MyObjectFixture *fixture, gconstpointer user_data) { fixture->obj = my_object_new (); my_object_set_prop1 (fixture->obj, "some-value"); my_object_do_some_complex_setup (fixture->obj, user_data); fixture->helper = other_object_new (); } static void my_object_fixture_tear_down (MyObjectFixture *fixture, gconstpointer user_data) { g_clear_object (&fixture->helper); g_clear_object (&fixture->obj); } static void test_my_object_test1 (MyObjectFixture *fixture, gconstpointer user_data) { g_assert_cmpstr (my_object_get_property (fixture->obj), ==, "initial-value"); } static void test_my_object_test2 (MyObjectFixture *fixture, gconstpointer user_data) { my_object_do_some_work_using_helper (fixture->obj, fixture->helper); g_assert_cmpstr (my_object_get_property (fixture->obj), ==, "updated-value"); } int main (int argc, char *argv[]) { setlocale (LC_ALL, ""); g_test_init (&argc, &argv, NULL); g_test_bug_base ("http://bugzilla.gnome.org/show_bug.cgi?id="); // Define the tests. g_test_add ("/my-object/test1", MyObjectFixture, "some-user-data", my_object_fixture_set_up, test_my_object_test1, my_object_fixture_tear_down); g_test_add ("/my-object/test2", MyObjectFixture, "some-user-data", my_object_fixture_set_up, test_my_object_test2, my_object_fixture_tear_down); return g_test_run (); } |
### Integrating GTest in your project
If you are using the Meson build system, you will
typically use the provided
primitive to call the test binaries,
e.g.:test()
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test( 'foo', executable('foo', 'foo.c', dependencies: deps), env: [ 'G_TEST_SRCDIR=@0@'.format(meson.current_source_dir()), 'G_TEST_BUILDDIR=@0@'.format(meson.current_build_dir()), ], ) test( 'bar', executable('bar', 'bar.c', dependencies: deps), env: [ 'G_TEST_SRCDIR=@0@'.format(meson.current_source_dir()), 'G_TEST_BUILDDIR=@0@'.format(meson.current_build_dir()), ], ) |
If you are using Autotools, you're strongly encouraged to use the Automake TAP harness; GLib provides template files for easily integrating with it:
You can copy these files in your own project's root directory, and then
set up your Makefile.am
file to reference them, for instance:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
include $(top_srcdir)/glib-tap.mk # test binaries test_programs = \ foo \ bar # data distributed in the tarball dist_test_data = \ foo.data.txt \ bar.data.txt # data not distributed in the tarball test_data = \ blah.data.txt |
Make sure to distribute the TAP files, using something like the following
in your top-level Makefile.am
:
1 2 3 |
EXTRA_DIST += \ tap-driver.sh \ tap-test |
glib-tap.mk
will be distributed implicitly due to being included in a
Makefile.am
. All three files should be added to version control.
If you don't have access to the Autotools TAP harness, you can use the gtester and gtester-report tools, and use the glib.mk Automake template provided by GLib.
void g_test_minimized_result (double minimized_quantity
,const char *format
,...
);
Report the result of a performance or measurement test.
The test should generally strive to minimize the reported
quantities (smaller values are better than larger ones),
this and minimized_quantity
can determine sorting
order for test result reports.
minimized_quantity |
the reported value |
|
format |
the format string of the report message |
|
... |
arguments to pass to the |
Since: 2.16
void g_test_maximized_result (double maximized_quantity
,const char *format
,...
);
Report the result of a performance or measurement test.
The test should generally strive to maximize the reported
quantities (larger values are better than smaller ones),
this and maximized_quantity
can determine sorting
order for test result reports.
maximized_quantity |
the reported value |
|
format |
the format string of the report message |
|
... |
arguments to pass to the |
Since: 2.16
void g_test_init (int *argc
,char ***argv
,...
);
Initialize the GLib testing framework, e.g. by seeding the
test random number generator, the name for g_get_prgname()
and parsing test related command line args.
So far, the following arguments are understood:
-l
: List test cases available in a test executable.
--seed=SEED
: Provide a random seed to reproduce test
runs using random numbers.
--verbose
: Run tests verbosely.
-q
, --quiet
: Run tests quietly.
-p PATH
: Execute all tests matching the given path.
-s PATH
: Skip all tests matching the given path.
This can also be used to force a test to run that would otherwise
be skipped (ie, a test whose name contains "/subprocess").
-m {perf|slow|thorough|quick|undefined|no-undefined}
: Execute tests according to these test modes:
perf
: Performance tests, may take long and report results (off by default).
slow
, thorough
: Slow and thorough tests, may take quite long and maximize coverage
(off by default).
quick
: Quick tests, should run really quickly and give good coverage (the default).
undefined
: Tests for undefined behaviour, may provoke programming errors
under g_test_trap_subprocess()
or g_test_expect_message()
to check
that appropriate assertions or warnings are given (the default).
no-undefined
: Avoid tests for undefined behaviour
--debug-log
: Debug test logging output.
argc |
Address of the |
|
argv |
Address of the |
|
... |
|
Since: 2.16
#define g_test_initialized()
Returns TRUE
if g_test_init()
has been called.
Since: 2.36
#define g_test_quick()
Returns TRUE
if tests are run in quick mode.
Exactly one of g_test_quick()
and g_test_slow()
is active in any run;
there is no "medium speed".
By default, tests are run in quick mode. In tests that use
g_test_init()
, the options -m quick
, -m slow
and -m thorough
can be used to change this.
#define g_test_slow()
Returns TRUE
if tests are run in slow mode.
Exactly one of g_test_quick()
and g_test_slow()
is active in any run;
there is no "medium speed".
By default, tests are run in quick mode. In tests that use
g_test_init()
, the options -m quick
, -m slow
and -m thorough
can be used to change this.
#define g_test_thorough()
Returns TRUE
if tests are run in thorough mode, equivalent to
g_test_slow()
.
By default, tests are run in quick mode. In tests that use
g_test_init()
, the options -m quick
, -m slow
and -m thorough
can be used to change this.
#define g_test_perf()
Returns TRUE
if tests are run in performance mode.
By default, tests are run in quick mode. In tests that use
g_test_init()
, the option -m perf
enables performance tests, while
-m quick
disables them.
#define g_test_verbose()
Returns TRUE
if tests are run in verbose mode.
In tests that use g_test_init()
, the option --verbose
enables this,
while -q
or --quiet
disables it.
The default is neither g_test_verbose()
nor g_test_quiet()
.
#define g_test_undefined()
Returns TRUE
if tests may provoke assertions and other formally-undefined
behaviour, to verify that appropriate warnings are given. It might, in some
cases, be useful to turn this off with if running tests under valgrind;
in tests that use g_test_init()
, the option -m no-undefined
disables
those tests, while -m undefined
explicitly enables them (the default
behaviour).
#define g_test_quiet()
Returns TRUE
if tests are run in quiet mode.
In tests that use g_test_init()
, the option -q
or --quiet
enables
this, while --verbose
disables it.
The default is neither g_test_verbose()
nor g_test_quiet()
.
gboolean
g_test_subprocess (void
);
Returns TRUE
(after g_test_init()
has been called) if the test
program is running under g_test_trap_subprocess()
.
Since: 2.38
int
g_test_run (void
);
Runs all tests under the toplevel suite which can be retrieved
with g_test_get_root()
. Similar to g_test_run_suite()
, the test
cases to be run are filtered according to test path arguments
(-p testpath
and -s testpath
) as parsed by g_test_init()
.
g_test_run_suite()
or g_test_run()
may only be called once in a
program.
In general, the tests and sub-suites within each suite are run in
the order in which they are defined. However, note that prior to
GLib 2.36, there was a bug in the g_test_add_*
functions which caused them to create multiple suites with the same
name, meaning that if you created tests "/foo/simple",
"/bar/simple", and "/foo/using-bar" in that order, they would get
run in that order (since g_test_run()
would run the first "/foo"
suite, then the "/bar" suite, then the second "/foo" suite). As of
2.36, this bug is fixed, and adding the tests in that order would
result in a running order of "/foo/simple", "/foo/using-bar",
"/bar/simple". If this new ordering is sub-optimal (because it puts
more-complicated tests before simpler ones, making it harder to
figure out exactly what has failed), you can fix it by changing the
test paths to group tests by suite in a way that will result in the
desired running order. Eg, "/simple/foo", "/simple/bar",
"/complex/foo-using-bar".
However, you should never make the actual result of a test depend
on the order that tests are run in. If you need to ensure that some
particular code runs before or after a given test case, use
g_test_add()
, which lets you specify setup and teardown functions.
If all tests are skipped, this function will return 0 if producing TAP output, or 77 (treated as "skip test" by Automake) otherwise.
0 on success, 1 on failure (assuming it returns at all),
0 or 77 if all tests were skipped with g_test_skip()
Since: 2.16
void g_test_add_func (const char *testpath
,GTestFunc test_func
);
Create a new test case, similar to g_test_create_case()
. However
the test is assumed to use no fixture, and test suites are automatically
created on the fly and added to the root fixture, based on the
slash-separated portions of testpath
.
If testpath
includes the component "subprocess" anywhere in it,
the test will be skipped by default, and only run if explicitly
required via the -p
command-line option or g_test_trap_subprocess()
.
testpath |
/-separated test case path name for the test. |
|
test_func |
The test function to invoke for this test. |
[scope async] |
Since: 2.16
void
(*GTestDataFunc) (gconstpointer user_data
);
The type used for test case functions that take an extra pointer argument.
Since: 2.28
void g_test_add_data_func (const char *testpath
,gconstpointer test_data
,GTestDataFunc test_func
);
Create a new test case, similar to g_test_create_case()
. However
the test is assumed to use no fixture, and test suites are automatically
created on the fly and added to the root fixture, based on the
slash-separated portions of testpath
. The test_data
argument
will be passed as first argument to test_func
.
If testpath
includes the component "subprocess" anywhere in it,
the test will be skipped by default, and only run if explicitly
required via the -p
command-line option or g_test_trap_subprocess()
.
testpath |
/-separated test case path name for the test. |
|
test_data |
Test data argument for the test function. |
|
test_func |
The test function to invoke for this test. |
[scope async] |
Since: 2.16
void g_test_add_data_func_full (const char *testpath
,gpointer test_data
,GTestDataFunc test_func
,GDestroyNotify data_free_func
);
Create a new test case, as with g_test_add_data_func()
, but freeing
test_data
after the test run is complete.
testpath |
/-separated test case path name for the test. |
|
test_data |
Test data argument for the test function. |
|
test_func |
The test function to invoke for this test. |
|
data_free_func |
GDestroyNotify for |
Since: 2.34
#define g_test_add(testpath, Fixture, tdata, fsetup, ftest, fteardown)
Hook up a new test case at testpath
, similar to g_test_add_func()
.
A fixture data structure with setup and teardown functions may be provided,
similar to g_test_create_case()
.
g_test_add() is implemented as a macro, so that the fsetup()
, ftest()
and
fteardown()
callbacks can expect a Fixture
pointer as their first argument
in a type safe manner. They otherwise have type GTestFixtureFunc.
testpath |
The test path for a new test case. |
|
Fixture |
The type of a fixture data structure. |
|
tdata |
Data argument for the test functions. |
|
fsetup |
The function to set up the fixture data. |
|
ftest |
The actual test function. |
|
fteardown |
The function to tear down the fixture data. |
Since: 2.16
gchar * g_test_build_filename (GTestFileType file_type
,const gchar *first_path
,...
);
Creates the pathname to a data file that is required for a test.
This function is conceptually similar to g_build_filename()
except
that the first argument has been replaced with a GTestFileType
argument.
The data file should either have been distributed with the module
containing the test (G_TEST_DIST
) or built as part of the build
system of that module (G_TEST_BUILT
).
In order for this function to work in srcdir != builddir situations, the G_TEST_SRCDIR and G_TEST_BUILDDIR environment variables need to have been defined. As of 2.38, this is done by the glib.mk included in GLib. Please ensure that your copy is up to date before using this function.
In case neither variable is set, this function will fall back to using the dirname portion of argv[0], possibly removing ".libs". This allows for casual running of tests directly from the commandline in the srcdir == builddir case and should also support running of installed tests, assuming the data files have been installed in the same relative path as the test binary.
file_type |
the type of file (built vs. distributed) |
|
first_path |
the first segment of the pathname |
|
... |
|
Since: 2.38
const gchar * g_test_get_filename (GTestFileType file_type
,const gchar *first_path
,...
);
Gets the pathname to a data file that is required for a test.
This is the same as g_test_build_filename()
with two differences.
The first difference is that must only use this function from within
a testcase function. The second difference is that you need not free
the return value -- it will be automatically freed when the testcase
finishes running.
It is safe to use this function from a thread inside of a testcase but you must ensure that all such uses occur before the main testcase function returns (ie: it is best to ensure that all threads have been joined).
file_type |
the type of file (built vs. distributed) |
|
first_path |
the first segment of the pathname |
|
... |
|
Since: 2.38
const gchar *
g_test_get_dir (GTestFileType file_type
);
Gets the pathname of the directory containing test files of the type
specified by file_type
.
This is approximately the same as calling g_test_build_filename("."), but you don't need to free the return value.
Since: 2.38
void
g_test_fail (void
);
Indicates that a test failed. This function can be called multiple times from the same test. You can use this function if your test failed in a recoverable way.
Do not use this function if the failure of a test could cause other tests to malfunction.
Calling this function will not stop the test from running, you need to return from the test function yourself. So you can produce additional diagnostic messages or even continue running the test.
If not called from inside a test, this function does nothing.
Since: 2.30
void
g_test_skip (const gchar *msg
);
Indicates that a test was skipped.
Calling this function will not stop the test from running, you need to return from the test function yourself. So you can produce additional diagnostic messages or even continue running the test.
If not called from inside a test, this function does nothing.
Since: 2.38
void
g_test_incomplete (const gchar *msg
);
Indicates that a test failed because of some incomplete functionality. This function can be called multiple times from the same test.
Calling this function will not stop the test from running, you need to return from the test function yourself. So you can produce additional diagnostic messages or even continue running the test.
If not called from inside a test, this function does nothing.
Since: 2.38
gboolean
g_test_failed (void
);
Returns whether a test has already failed. This will
be the case when g_test_fail()
, g_test_incomplete()
or g_test_skip()
have been called, but also if an
assertion has failed.
This can be useful to return early from a test if continuing after a failed assertion might be harmful.
The return value of this function is only meaningful if it is called from inside a test function.
Since: 2.38
void g_test_message (const char *format
,...
);
Add a message to the test report.
Since: 2.16
void
g_test_bug_base (const char *uri_pattern
);
Specify the base URI for bug reports.
The base URI is used to construct bug report messages for
g_test_message()
when g_test_bug()
is called.
Calling this function outside of a test case sets the
default base URI for all test cases. Calling it from within
a test case changes the base URI for the scope of the test
case only.
Bug URIs are constructed by appending a bug specific URI
portion to uri_pattern
, or by replacing the special string
'%s' within uri_pattern
if that is present.
Since: 2.16
void
g_test_bug (const char *bug_uri_snippet
);
This function adds a message to test reports that
associates a bug URI with a test case.
Bug URIs are constructed from a base URI set with g_test_bug_base()
and bug_uri_snippet
.
Since: 2.16
gboolean (*GTestLogFatalFunc) (const gchar *log_domain
,GLogLevelFlags log_level
,const gchar *message
,gpointer user_data
);
Specifies the prototype of fatal log handler functions.
log_domain |
the log domain of the message |
|
log_level |
the log level of the message (including the fatal and recursion flags) |
|
message |
the message to process |
|
user_data |
user data, set in |
Since: 2.22
void g_test_log_set_fatal_handler (GTestLogFatalFunc log_func
,gpointer user_data
);
Installs a non-error fatal log handler which can be used to decide whether log messages which are counted as fatal abort the program.
The use case here is that you are running a test case that depends on particular libraries or circumstances and cannot prevent certain known critical or warning messages. So you install a handler that compares the domain and message to precisely not abort in such a case.
Note that the handler is reset at the beginning of any test case, so you have to set it inside each test function which needs the special behavior.
This handler has no effect on g_error messages.
This handler also has no effect on structured log messages (using
g_log_structured()
or g_log_structured_array()
). To change the fatal
behaviour for specific log messages, programs must install a custom log
writer function using g_log_set_writer_func()
.See
Using Structured Logging.
Since: 2.22
void
g_test_timer_start (void
);
Start a timing test. Call g_test_timer_elapsed()
when the task is supposed
to be done. Call this function again to restart the timer.
Since: 2.16
double
g_test_timer_elapsed (void
);
Get the time since the last start of the timer with g_test_timer_start()
.
Since: 2.16
double
g_test_timer_last (void
);
Report the last result of g_test_timer_elapsed()
.
Since: 2.16
void
g_test_queue_free (gpointer gfree_pointer
);
Enqueue a pointer to be released with g_free()
during the next
teardown phase. This is equivalent to calling g_test_queue_destroy()
with a destroy callback of g_free()
.
Since: 2.16
void g_test_queue_destroy (GDestroyNotify destroy_func
,gpointer destroy_data
);
This function enqueus a callback destroy_func
to be executed
during the next test case teardown phase. This is most useful
to auto destruct allocated test resources at the end of a test run.
Resources are released in reverse queue order, that means enqueueing
callback A before callback B will cause B()
to be called before
A()
during teardown.
Since: 2.16
#define g_test_queue_unref(gobject)
Enqueue an object to be released with g_object_unref()
during
the next teardown phase. This is equivalent to calling
g_test_queue_destroy()
with a destroy callback of g_object_unref()
.
Since: 2.16
void g_test_expect_message (const gchar *log_domain
,GLogLevelFlags log_level
,const gchar *pattern
);
Indicates that a message with the given log_domain
and log_level
,
with text matching pattern
, is expected to be logged. When this
message is logged, it will not be printed, and the test case will
not abort.
This API may only be used with the old logging API (g_log()
without
G_LOG_USE_STRUCTURED
defined). It will not work with the structured logging
API. See Testing for Messages.
Use g_test_assert_expected_messages()
to assert that all
previously-expected messages have been seen and suppressed.
You can call this multiple times in a row, if multiple messages are
expected as a result of a single call. (The messages must appear in
the same order as the calls to g_test_expect_message()
.)
For example:
1 2 3 4 5 6 7 |
// g_main_context_push_thread_default() should fail if the // context is already owned by another thread. g_test_expect_message (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, "assertion*acquired_context*failed"); g_main_context_push_thread_default (bad_context); g_test_assert_expected_messages (); |
Note that you cannot use this to test g_error()
messages, since
g_error()
intentionally never returns even if the program doesn't
abort; use g_test_trap_subprocess()
in this case.
If messages at G_LOG_LEVEL_DEBUG
are emitted, but not explicitly
expected via g_test_expect_message()
then they will be ignored.
log_domain |
the log domain of the message. |
[nullable] |
log_level |
the log level of the message |
|
pattern |
a glob-style pattern |
Since: 2.34
#define g_test_assert_expected_messages()
Asserts that all messages previously indicated via
g_test_expect_message()
have been seen and suppressed.
This API may only be used with the old logging API (g_log()
without
G_LOG_USE_STRUCTURED
defined). It will not work with the structured logging
API. See Testing for Messages.
If messages at G_LOG_LEVEL_DEBUG
are emitted, but not explicitly
expected via g_test_expect_message()
then they will be ignored.
Since: 2.34
void g_test_trap_subprocess (const char *test_path
,guint64 usec_timeout
,GTestSubprocessFlags test_flags
);
Respawns the test program to run only test_path
in a subprocess.
This can be used for a test case that might not return, or that
might abort.
If test_path
is NULL
then the same test is re-run in a subprocess.
You can use g_test_subprocess()
to determine whether the test is in
a subprocess or not.
test_path
can also be the name of the parent test, followed by
"/subprocess/
" and then a name for the specific subtest (or just
ending with "/subprocess
" if the test only has one child test);
tests with names of this form will automatically be skipped in the
parent process.
If usec_timeout
is non-0, the test subprocess is aborted and
considered failing if its run time exceeds it.
The subprocess behavior can be configured with the GTestSubprocessFlags flags.
You can use methods such as g_test_trap_assert_passed()
,
g_test_trap_assert_failed()
, and g_test_trap_assert_stderr()
to
check the results of the subprocess. (But note that
g_test_trap_assert_stdout()
and g_test_trap_assert_stderr()
cannot be used if test_flags
specifies that the child should
inherit the parent stdout/stderr.)
If your
needs to behave differently in
the subprocess, you can call main()
g_test_subprocess()
(after calling
g_test_init()
) to see whether you are in a subprocess.
The following example tests that calling
my_object_new(1000000)
will abort with an error
message.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 |
static void test_create_large_object (void) { if (g_test_subprocess ()) { my_object_new (1000000); return; } // Reruns this same test in a subprocess g_test_trap_subprocess (NULL, 0, 0); g_test_trap_assert_failed (); g_test_trap_assert_stderr ("*ERROR*too large*"); } int main (int argc, char **argv) { g_test_init (&argc, &argv, NULL); g_test_add_func ("/myobject/create_large_object", test_create_large_object); return g_test_run (); } |
test_path |
Test to run in a subprocess. |
[nullable] |
usec_timeout |
Timeout for the subprocess test in micro seconds. |
|
test_flags |
Flags to modify subprocess behaviour. |
Since: 2.38
gboolean
g_test_trap_has_passed (void
);
Check the result of the last g_test_trap_subprocess()
call.
Since: 2.16
gboolean
g_test_trap_reached_timeout (void
);
Check the result of the last g_test_trap_subprocess()
call.
Since: 2.16
#define g_test_trap_assert_passed()
Assert that the last test subprocess passed.
See g_test_trap_subprocess()
.
Since: 2.16
#define g_test_trap_assert_failed()
Assert that the last test subprocess failed.
See g_test_trap_subprocess()
.
This is sometimes used to test situations that are formally considered to
be undefined behaviour, like inputs that fail a g_return_if_fail()
check. In these situations you should skip the entire test, including the
call to g_test_trap_subprocess()
, unless g_test_undefined()
returns TRUE
to indicate that undefined behaviour may be tested.
Since: 2.16
#define g_test_trap_assert_stdout(soutpattern)
Assert that the stdout output of the last test subprocess matches
soutpattern
. See g_test_trap_subprocess()
.
Since: 2.16
#define g_test_trap_assert_stdout_unmatched(soutpattern)
Assert that the stdout output of the last test subprocess
does not match soutpattern
. See g_test_trap_subprocess()
.
Since: 2.16
#define g_test_trap_assert_stderr(serrpattern)
Assert that the stderr output of the last test subprocess
matches serrpattern
. See g_test_trap_subprocess()
.
This is sometimes used to test situations that are formally
considered to be undefined behaviour, like code that hits a
g_assert()
or g_error()
. In these situations you should skip the
entire test, including the call to g_test_trap_subprocess()
, unless
g_test_undefined()
returns TRUE
to indicate that undefined
behaviour may be tested.
Since: 2.16
#define g_test_trap_assert_stderr_unmatched(serrpattern)
Assert that the stderr output of the last test subprocess
does not match serrpattern
. See g_test_trap_subprocess()
.
Since: 2.16
gboolean g_test_trap_fork (guint64 usec_timeout
,GTestTrapFlags test_trap_flags
);
g_test_trap_fork
is deprecated and should not be used in newly-written code.
This function is implemented only on Unix platforms,
and is not always reliable due to problems inherent in
fork-without-exec. Use g_test_trap_subprocess()
instead.
Fork the current test program to execute a test case that might not return or that might abort.
If usec_timeout
is non-0, the forked test case is aborted and
considered failing if its run time exceeds it.
The forking behavior can be configured with the GTestTrapFlags flags.
In the following example, the test code forks, the forked child process produces some sample output and exits successfully. The forking parent process then asserts successful child program termination and validates child program outputs.
1 2 3 4 5 6 7 8 9 10 11 12 13 |
static void test_fork_patterns (void) { if (g_test_trap_fork (0, G_TEST_TRAP_SILENCE_STDOUT | G_TEST_TRAP_SILENCE_STDERR)) { g_print ("some stdout text: somagic17\n"); g_printerr ("some stderr text: semagic43\n"); exit (0); // successful test run } g_test_trap_assert_passed (); g_test_trap_assert_stdout ("*somagic17*"); g_test_trap_assert_stderr ("*semagic43*"); } |
usec_timeout |
Timeout for the forked test in micro seconds. |
|
test_trap_flags |
Flags to modify forking behaviour. |
Since: 2.16
#define g_test_rand_bit()
Get a reproducible random bit (0 or 1), see g_test_rand_int()
for details on test case random numbers.
Since: 2.16
gint32
g_test_rand_int (void
);
Get a reproducible random integer number.
The random numbers generated by the g_test_rand_*() family of functions change with every new test program start, unless the --seed option is given when starting test programs.
For individual test cases however, the random number generator is reseeded, to avoid dependencies between tests and to make --seed effective for all test cases.
Since: 2.16
gint32 g_test_rand_int_range (gint32 begin
,gint32 end
);
Get a reproducible random integer number out of a specified range,
see g_test_rand_int()
for details on test case random numbers.
begin |
the minimum value returned by this function |
|
end |
the smallest value not to be returned by this function |
Since: 2.16
double
g_test_rand_double (void
);
Get a reproducible random floating point number,
see g_test_rand_int()
for details on test case random numbers.
Since: 2.16
double g_test_rand_double_range (double range_start
,double range_end
);
Get a reproducible random floating pointer number out of a specified range,
see g_test_rand_int()
for details on test case random numbers.
range_start |
the minimum value returned by this function |
|
range_end |
the minimum value not returned by this function |
Since: 2.16
#define g_assert(expr)
Debugging macro to terminate the application if the assertion fails. If the assertion fails (i.e. the expression is not true), an error message is logged and the application is terminated.
The macro can be turned off in final releases of code by defining
G_DISABLE_ASSERT
when compiling the application, so code must
not depend on any side effects from expr
.
#define g_assert_not_reached()
Debugging macro to terminate the application if it is ever reached. If it is reached, an error message is logged and the application is terminated.
The macro can be turned off in final releases of code by defining
G_DISABLE_ASSERT
when compiling the application.
#define g_assert_cmpstr(s1, cmp, s2)
Debugging macro to compare two strings. If the comparison fails,
an error message is logged and the application is either terminated
or the testcase marked as failed.
The strings are compared using g_strcmp0()
.
The effect of g_assert_cmpstr (s1, op, s2)
is
the same as g_assert_true (g_strcmp0 (s1, s2) op 0)
.
The advantage of this macro is that it can produce a message that
includes the actual values of s1
and s2
.
1 |
g_assert_cmpstr (mystring, ==, "fubar"); |
Since: 2.16
#define g_assert_cmpint(n1, cmp, n2)
Debugging macro to compare two integers.
The effect of g_assert_cmpint (n1, op, n2)
is
the same as g_assert_true (n1 op n2)
. The advantage
of this macro is that it can produce a message that includes the
actual values of n1
and n2
.
n1 |
an integer |
|
cmp |
The comparison operator to use. One of ==, !=, <, >, <=, >=. |
|
n2 |
another integer |
Since: 2.16
#define g_assert_cmpuint(n1, cmp, n2)
Debugging macro to compare two unsigned integers.
The effect of g_assert_cmpuint (n1, op, n2)
is
the same as g_assert_true (n1 op n2)
. The advantage
of this macro is that it can produce a message that includes the
actual values of n1
and n2
.
n1 |
an unsigned integer |
|
cmp |
The comparison operator to use. One of ==, !=, <, >, <=, >=. |
|
n2 |
another unsigned integer |
Since: 2.16
#define g_assert_cmphex(n1, cmp, n2)
Debugging macro to compare to unsigned integers.
This is a variant of g_assert_cmpuint()
that displays the numbers
in hexadecimal notation in the message.
n1 |
an unsigned integer |
|
cmp |
The comparison operator to use. One of ==, !=, <, >, <=, >=. |
|
n2 |
another unsigned integer |
Since: 2.16
#define g_assert_cmpfloat(n1,cmp,n2)
Debugging macro to compare two floating point numbers.
The effect of g_assert_cmpfloat (n1, op, n2)
is
the same as g_assert_true (n1 op n2)
. The advantage
of this macro is that it can produce a message that includes the
actual values of n1
and n2
.
n1 |
an floating point number |
|
cmp |
The comparison operator to use. One of ==, !=, <, >, <=, >=. |
|
n2 |
another floating point number |
Since: 2.16
#define g_assert_cmpmem(m1, l1, m2, l2)
Debugging macro to compare memory regions. If the comparison fails, an error message is logged and the application is either terminated or the testcase marked as failed.
The effect of g_assert_cmpmem (m1, l1, m2, l2)
is
the same as g_assert_true (l1 == l2 && memcmp (m1, m2, l1) == 0)
.
The advantage of this macro is that it can produce a message that
includes the actual values of l1
and l2
.
1 |
g_assert_cmpmem (buf->data, buf->len, expected, sizeof (expected)); |
Since: 2.46
#define g_assert_no_error(err)
Debugging macro to check that a GError is not set.
The effect of g_assert_no_error (err)
is
the same as g_assert_true (err == NULL)
. The advantage
of this macro is that it can produce a message that includes
the error message and code.
Since: 2.20
#define g_assert_error(err, dom, c)
Debugging macro to check that a method has returned the correct GError.
The effect of g_assert_error (err, dom, c)
is
the same as g_assert_true (err != NULL && err->domain
== dom && err->code == c)
. The advantage of this
macro is that it can produce a message that includes the incorrect
error message and code.
This can only be used to test for a specific error. If you want to
test that err
is set, but don't care what it's set to, just use
g_assert (err != NULL)
Since: 2.20
#define g_assert_true(expr)
Debugging macro to check that an expression is true.
If the assertion fails (i.e. the expression is not true), an error message is logged and the application is either terminated or the testcase marked as failed.
See g_test_set_nonfatal_assertions()
.
Since: 2.38
#define g_assert_false(expr)
Debugging macro to check an expression is false.
If the assertion fails (i.e. the expression is not false), an error message is logged and the application is either terminated or the testcase marked as failed.
See g_test_set_nonfatal_assertions()
.
Since: 2.38
#define g_assert_null(expr)
Debugging macro to check an expression is NULL
.
If the assertion fails (i.e. the expression is not NULL
),
an error message is logged and the application is either
terminated or the testcase marked as failed.
See g_test_set_nonfatal_assertions()
.
Since: 2.38
#define g_assert_nonnull(expr)
Debugging macro to check an expression is not NULL
.
If the assertion fails (i.e. the expression is NULL
),
an error message is logged and the application is either
terminated or the testcase marked as failed.
See g_test_set_nonfatal_assertions()
.
Since: 2.40
void
g_test_set_nonfatal_assertions (void
);
Changes the behaviour of g_assert_cmpstr()
, g_assert_cmpint()
,
g_assert_cmpuint()
, g_assert_cmphex()
, g_assert_cmpfloat()
,
g_assert_true()
, g_assert_false()
, g_assert_null()
, g_assert_no_error()
,
g_assert_error()
, g_test_assert_expected_messages()
and the various
g_test_trap_assert_*() macros to not abort to program, but instead
call g_test_fail()
and continue. (This also changes the behavior of
g_test_fail()
so that it will not cause the test program to abort
after completing the failed test.)
Note that the g_assert_not_reached()
and g_assert()
are not
affected by this.
This function can only be called after g_test_init()
.
Since: 2.38
void (*GTestFixtureFunc) (gpointer fixture
,gconstpointer user_data
);
The type used for functions that operate on test fixtures. This is used for the fixture setup and teardown functions as well as for the testcases themselves.
user_data
is a pointer to the data that was given when registering
the test case.
fixture
will be a pointer to the area of memory allocated by the
test framework, of the size requested. If the requested size was
zero then fixture
will be equal to user_data
.
fixture |
the test fixture. |
[not nullable] |
user_data |
the data provided when registering the test |
Since: 2.28
GTestCase * g_test_create_case (const char *test_name
,gsize data_size
,gconstpointer test_data
,GTestFixtureFunc data_setup
,GTestFixtureFunc data_test
,GTestFixtureFunc data_teardown
);
Create a new GTestCase, named test_name
, this API is fairly
low level, calling g_test_add()
or g_test_add_func()
is preferable.
When this test is executed, a fixture structure of size data_size
will be automatically allocated and filled with zeros. Then data_setup
is
called to initialize the fixture. After fixture setup, the actual test
function data_test
is called. Once the test run completes, the
fixture structure is torn down by calling data_teardown
and
after that the memory is automatically released by the test framework.
Splitting up a test run into fixture setup, test function and
fixture teardown is most useful if the same fixture is used for
multiple tests. In this cases, g_test_create_case()
will be
called with the same fixture, but varying test_name
and
data_test
arguments.
test_name |
the name for the test case |
|
data_size |
the size of the fixture data structure |
|
test_data |
test data argument for the test functions |
|
data_setup |
the function to set up the fixture data. |
[scope async] |
data_test |
the actual test function. |
[scope async] |
data_teardown |
the function to teardown the fixture data. |
[scope async] |
Since: 2.16
GTestSuite *
g_test_create_suite (const char *suite_name
);
Create a new test suite with the name suite_name
.
Since: 2.16
GTestSuite *
g_test_get_root (void
);
Get the toplevel test suite for the test path API.
Since: 2.16
void g_test_suite_add (GTestSuite *suite
,GTestCase *test_case
);
Adds test_case
to suite
.
Since: 2.16
void g_test_suite_add_suite (GTestSuite *suite
,GTestSuite *nestedsuite
);
Adds nestedsuite
to suite
.
Since: 2.16
int
g_test_run_suite (GTestSuite *suite
);
Execute the tests within suite
and all nested GTestSuites.
The test suites to be executed are filtered according to
test path arguments (-p testpath
and -s testpath
) as parsed by
g_test_init()
. See the g_test_run()
documentation for more
information on the order that tests are run in.
g_test_run_suite() or g_test_run()
may only be called once
in a program.
Since: 2.16
The type of file to return the filename for, when used with
g_test_build_filename()
.
These two options correspond rather directly to the 'dist' and
'built' terminology that automake uses and are explicitly used to
distinguish between the 'srcdir' and 'builddir' being separate. All
files in your project should either be dist (in the
EXTRA_DIST
or dist_schema_DATA
sense, in which case they will always be in the srcdir) or built (in
the BUILT_SOURCES
sense, in which case they will
always be in the builddir).
Note: as a general rule of automake, files that are generated only as part of the build-from-git process (but then are distributed with the tarball) always go in srcdir (even if doing a srcdir != builddir build from git) and are considered as distributed files.
Since: 2.38
GTestTrapFlags
is deprecated and should not be used in newly-written code.
GTestTrapFlags is used only with g_test_trap_fork()
,
which is deprecated. g_test_trap_subprocess()
uses
GTestSubprocessFlags.
Test traps are guards around forked tests. These flags determine what traps to set.
Redirect stdout of the test child to
|
||
Redirect stderr of the test child to
|
||
If this flag is given, stdin of the
child process is shared with stdin of its parent process.
It is redirected to |
Flags to pass to g_test_trap_subprocess()
to control input and output.
Note that in contrast with g_test_trap_fork()
, the default is to
not show stdout and stderr.
If this flag is given, the child
process will inherit the parent's stdin. Otherwise, the child's
stdin is redirected to |
||
If this flag is given, the child
process will inherit the parent's stdout. Otherwise, the child's
stdout will not be visible, but it will be captured to allow
later tests with |
||
If this flag is given, the child
process will inherit the parent's stderr. Otherwise, the child's
stderr will not be visible, but it will be captured to allow
later tests with |