Testing the UEFI C library

Testing infrastructure

The LLVM C library supports different kinds of tests depending on the build configuration. The UEFI target is considered a full build and therefore provides all of its own utilities to build and run the generated tests. Currently UEFI supports two kinds of tests.

1. Hermetic tests - These are unit tests built with a test suite similar to Google’s gtest infrastructure. These use the same infrastructure as unit tests except that the entire environment is self-hosted.

2. Integration tests - These are lightweight tests that simply call a main function and checks if it returns non-zero.

The UEFI target uses the same testing infrastructure as the other supported libc targets. We do this by treating UEFI as a standard hosted environment capable of launching a main function. This only requires us to run the tests in a UEFI environment.