typed test

see the add test again add test. it is a template function. we need to test it with different types, such as int, float, double, etc. Write a just for a type, and then copy it for other types. It is a waste of time and low efficiency. We can use the template to solve this problem. with the typed test, we can write a test for a type, and then use the typed test to test it.

see the following example:

#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include "turbo/testing/test.h"
template <typename T>
void add(T a, T b) {
    return a + b;
}

using IntTypes = std::tuple<int8_t, uint8_t, int16_t, uint16_t, int32_t,
        uint32_t, int64_t, uint64_t>;


TEST_CASE_TEMPLATE_DEFINE("add test", T, test_id) {
    CHECK(add(T(1), T(2)) == T(3));
}

TEST_CASE_TEMPLATE_APPLY(test_id, IntTypes);

the TEST_CASE_TEMPLATE_DEFINE is used to define a template test case. the first parameter is the name of the test case, the second parameter is the type that calls the test case. the third parameter is the id of the test case. the TEST_CASE_TEMPLATE_APPLY is used to apply the template test case.

after we define the template test case. next, we can call it with different types by TEST_CASE_TEMPLATE_APPLY. the first parameter is the test_id of the template we have defined. the second parameter is the types we want to test. the types can be a type, a tuple of types, or a type list. in the doctest implementation, it finally calls it by std::tuple.