Use for any task that writes or runs GoogleTest tests for embedded C++ (C++17 or later) on ARM, even one test with a mock, including firmware tests that pass on the host but fail on the target: TEST, TEST_F and parameterized tests, EXPECT vs ASSERT, fixtures, GoogleMock, cross-compiling with arm-none-eabi-g++, running on host or QEMU and XML output for CI. Pure C uses unity-test-framework-c.