The tests are written with the Google Test framework.

There are two kinds of tests:

• Unit tests test the BLAS interface as available to the users.
• Expression tests include the header-only framework to test the expression trees and features that are not available through the BLAS interface.

The tests are built with the project by default. This can be set or unset with the CMake option BLAS_ENABLE_TESTING.

A reference BLAS implementation like OpenBLAS is required to be installed on the machine. Use the CMake CMAKE_PREFIX_PATH option to point to its root folder if it is installed in a custom location.

By default, only the unit tests are build. Use -DENABLE_EXPRESSION_TESTS=ON to build the expression tests.

You can set a specific device to run the tests with, using the CMake TEST_DEVICE option. The format of this string is a vendor name, followed by gpu, cpu or accel. A * may take the place of either a vendor or device type, and means "any". If the specified device isn't found, a default device is used instead. Example: intel:gpu. If TEST_DEVICE is not specified, the device used will be chosen based on the behaviour of SYCL's default selector.

You can run all tests with CTest by simply running the following command in the build directory:

ctest

You can also run individual tests by executing their executable found in the build directory, in test/unittest or test/exprtest. In that case, you can select the device with the --device argument. Example:

./test/unittest/blas3_gemm_test --device=intel:gpu