What are some examples of unit testing in C++?

What are some examples of unit testing in C++?

Unit testing in C++ involves testing individual components of your code. For example, using the Google Test framework, you can write tests for a function that adds two numbers.

Can you show me a simple code example for that?

Sure! Here's a simple example:

#include <gtest/gtest.h>

int add(int a, int b) {
    return a + b;
}

TEST(AddTest, PositiveNumbers) {
    EXPECT_EQ(add(1, 2), 3);
}

TEST(AddTest, NegativeNumbers) {
    EXPECT_EQ(add(-1, -1), -2);
}
}

int main(int argc, char **argv) {
    ::testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}

What does EXPECT_EQ do in this context?

EXPECT_EQ is a macro provided by Google Test that checks if the two values are equal. If they are not, the test fails, helping you identify issues in your code.

Are there other frameworks for unit testing in C++?

Yes, other popular frameworks include Catch2, Boost.Test, and CppUTest. Each has its own features and advantages.