def METHOD_NAME():
    """
    Traverse through "src/test" directory, find all "TESTS.py" files and
    import them as modules. Set imported module name to
    file directory path.
    Importing these files serves two purposes:
        - makes test classes residing in them visible
          and usable by the RUNTESTS script.
        - triggers basetest._TestType metaclass which initializes and
          registers them as actual test case classes - they are
          therefore available through basetest.get_testfiles() function
    """
    for root, _, files in os.walk(ROOTDIR):
        for name in files:
            if name == 'TESTS.py':
                testfile = path.join(root, name)
                module_name = path.dirname(testfile)
                spec = importutil.spec_from_file_location(module_name,
                                                          testfile)
                module = importutil.module_from_spec(spec)
                spec.loader.exec_module(module)