### Question:
JSkatPlayerResolver { public static Set<String> getAllAIPlayerImplementations() { final Set<String> result = getAllImplementations(); result.removeAll(EXCLUDED_PLAYER_CLASSES); result.removeAll(UNIT_TEST_PLAYER_CLASSES); LOG.info("Found {} implementations of AbstractJSkatPlayer.", result.size()); return result; }  static Set<String> getAllAIPlayerImplementations(); static final String HUMAN_PLAYER_CLASS; static final Set<String> EXCLUDED_PLAYER_CLASSES; static final Set<String> UNIT_TEST_PLAYER_CLASSES; }### Answer:
@Test public void testGetAllAIPlayerImplementations() { final Set<String> implementations = JSkatPlayerResolver.getAllAIPlayerImplementations(); assertThat(implementations).hasSize(2); }