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tests for function handleScroll (apache#13896)
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yardz authored and Allan Caetano de Oliveira committed May 21, 2021
1 parent 1e57c0c commit 297010b
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/**
* 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 handleScroll from '.';

jest.useFakeTimers();

const { scroll } = window;

afterAll(() => {
window.scroll = scroll;
});

test('calling: "NOT_SCROLL_TOP" ,"SCROLL_TOP", "NOT_SCROLL_TOP"', () => {
window.scroll = jest.fn();

handleScroll('NOT_SCROLL_TOP');

expect(clearInterval).not.toBeCalled();

handleScroll('SCROLL_TOP');

handleScroll('NOT_SCROLL_TOP');
expect(clearInterval).toHaveBeenCalledWith(expect.any(Number));
});

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