source: class KeyboardFaceSourceTest {
  
      private static final int CODE_SAD;
      private static final int CODE_HAPPY;
      private KeyboardFaceSource source;
      @Mock
      private FaceTracker.FaceListener mockListener;
      @Mock
      private KeyToFaceMappings mockMappings;
  
      @Test
      public void whenUnsupportedKeyIsPressed_thenNoCallbacksAreTriggered() {
  
target:         source.onKeyDown(1337);
          verify(mockListener, times(0)).onNewFace(any(FaceExpression.class));
      }
  
  }