This is a small testing framework inspired by gtest for use in C 89/90 projects. The library provides facilities for running and filtering tests.

In order to test your code with ctest, you write functions that have expectations or assertions about how your code should behave. For example, a test for a global function fibonacci might look like this:

void test_fib() {
	CTEST_ASSERT_INT_EQ(fibonacci(1), 1);
	CTEST_ASSERT_INT_EQ(fibonacci(5), 5);
	CTEST_ASSERT_INT_EQ(fibonacci(10), 55);
}

In order to run the test, it must be added to the test system:

int main(int argc, char** argv) {
	ctest_init();

	CTEST_ADD_TEST(test_fib);

	return ctest_run();
}

You can also make use of fixtures to reduce amount of setup and teardown code that would be shared by numerous tests. A fixture has a unique name and consists of a structure to hold the test data along with a setup and teardown method. The system will handle calling the correct setup and teardown method when running each test belonging to the fixture.

typedef struct {
	list* test_list;
} list_test_data;

void list_test_setup(list_test_data* fixture) {
	fixture->test_list = list_create();
}

void list_test_teardown(list_test_data* fixture) {
	list_destroy(fixture->test_list);
}

CTEST_FIXTURE(list_test, list_test_data, list_test_setup, list_test_teardown)

A test using a fixture receives a pointer to the fixture's structure when it is ran:

void test_list_push(list_test_data* fixture) {
	list_push_back(fixture->test_list, 42);

	CTEST_ASSERT_INT_EQ(list_size(fixture->test_list), 1)
}

Fixture tests are added in a similar way to test functions:

int main(int argc, char** argv) {
	ctest_init();

	CTEST_ADD_TEST_F(list_test, test_list_push);

	return ctest_run();
}