std::generator Use:

The generate_values function lazily produces values (e.g., squares of integers from 1 to 10). Conversion to std::vector:

Since ::testing::ValuesIn requires an iterable container, the generator_to_vector function iterates through the generator and collects its values in a std::vector. Google Test Integration:

INSTANTIATE_TEST_SUITE_P uses the vector produced by generator_to_vector to parameterize the test cases. Test Case Execution:

Each value generated by the generator becomes a parameter for a test case.