airbnb/caravel

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import { renderHook } from '@testing-library/react-hooks';
import { useComponentDidUpdate } from './useComponentDidUpdate';

test('the effect should not be executed on the first render', () => {
  const effect = jest.fn();
  const hook = renderHook(props => useComponentDidUpdate(props.effect), {
    initialProps: { effect },
  });
  expect(effect).toBeCalledTimes(0);
  const changedEffect = jest.fn();
  hook.rerender({ effect: changedEffect });
  expect(changedEffect).toBeCalledTimes(1);
});