Testing

Writing automated tests with GoogleTest

Let me cut down this test for you

#include "../src/super-math.h"
#include <gtest/gtest.h>

TEST(DoubleMeSuite, DoubleMePositiveValues) {
    EXPECT_EQ(double_me(23), 46);
}

• #include "../src/super-math.h" we include the header file containing the function we want to test
• #include <gtest/gtest.h> we include gtest header to access to their macros
• TEST(DoubleMeSuite, DoubleMePositiveValues) { ... } TEST is a macro to define a test case, the first argument is the name of the suite, the second is the name of the test. You will have several tests per suite but the second parameter will be unique.
• EXPECT_EQ is another macro that let you verify that the first value returned by the tested function is the same as the second argument
• ASSERT_EQ is doing the same but it will stop the current test if it fails, so you will see only one error

You can read more on the GoogleTest documentation how to write more advanced tests.

TODO: continue with more assertions...