@Test
public void testZoomIn_modelNotUpdatedWhenControllerNotEnabled() {

  expect(astronomerModel.getFieldOfView()).andReturn(INITIAL_FIELD_OF_VIEW);
  // Note that setFieldOfView will not be called
  replay(astronomerModel);
  zoomController.setEnabled(false);
  zoomController.zoomBy(0.9f);
  verify(astronomerModel);
}