def METHOD_NAME():
    """Ensure a default master is defined."""
    check = CheckTester(
        ufo_sources_profile, "com.google.fonts/check/designspace_has_default_master"
    )
    designspace = TEST_FILE("stupidfont/Stupid Font.designspace")
    assert_PASS(check(designspace))
    # TODO: FAIL, 'not-found'