62 lines
2.2 KiB
TypeScript
62 lines
2.2 KiB
TypeScript
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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import {renderHook} from '@testing-library/react-native';
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import {BackHandler} from 'react-native';
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import {Screens} from '@constants';
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import {useCurrentScreen} from '@store/navigation_store';
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import useAndroidHardwareBackHandler from './android_back_handler';
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jest.mock('@store/navigation_store', () => ({
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useCurrentScreen: jest.fn(),
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}));
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describe('useAndroidHardwareBackHandler', () => {
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afterAll(() => {
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jest.resetAllMocks();
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});
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test('useAndroidHardwareBackHandler - calls callback when visible screen matches componentId', () => {
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const componentId = Screens.ABOUT;
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const callback = jest.fn();
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const addEventListenerSpy = jest.spyOn(BackHandler, 'addEventListener');
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jest.mocked(useCurrentScreen).mockReturnValue(componentId);
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renderHook(() => useAndroidHardwareBackHandler(componentId, callback));
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const hardwareBackPressHandler = addEventListenerSpy.mock.calls[0][1];
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hardwareBackPressHandler();
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expect(callback).toHaveBeenCalled();
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});
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test('useAndroidHardwareBackHandler - does not call callback when visible screen does not match componentId', () => {
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const componentId = Screens.ABOUT;
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const callback = jest.fn();
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const addEventListenerSpy = jest.spyOn(BackHandler, 'addEventListener');
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jest.mocked(useCurrentScreen).mockReturnValue(Screens.CHANNEL);
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renderHook(() => useAndroidHardwareBackHandler(componentId, callback));
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const hardwareBackPressHandler = addEventListenerSpy.mock.calls[0][1];
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hardwareBackPressHandler();
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expect(callback).not.toHaveBeenCalled();
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});
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test('useAndroidHardwareBackHandler - removes event listener on unmount', () => {
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const componentId = Screens.ABOUT;
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const callback = jest.fn();
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const remove = jest.fn();
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const addEventListenerSpy = jest.spyOn(BackHandler, 'addEventListener');
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addEventListenerSpy.mockReturnValue({remove});
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const {unmount} = renderHook(() => useAndroidHardwareBackHandler(componentId, callback));
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unmount();
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expect(remove).toHaveBeenCalled();
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});
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});
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