62 lines
1.7 KiB
TypeScript
62 lines
1.7 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, act} from '@testing-library/react-native';
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import {DeviceEventEmitter} from 'react-native';
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import {Events} from '@constants';
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import {useChannelSwitch} from './channel_switch';
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describe('useChannelSwitch', () => {
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beforeEach(() => {
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jest.useFakeTimers();
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});
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afterEach(() => {
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jest.clearAllTimers();
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jest.useRealTimers();
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});
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it('should initialize with loading false', () => {
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const {result} = renderHook(() => useChannelSwitch());
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expect(result.current).toBe(false);
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});
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it('should set loading true when switching starts', () => {
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const {result} = renderHook(() => useChannelSwitch());
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act(() => {
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DeviceEventEmitter.emit(Events.CHANNEL_SWITCH, true);
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});
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expect(result.current).toBe(true);
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});
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it('should set loading false when switching ends', () => {
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const {result} = renderHook(() => useChannelSwitch());
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act(() => {
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DeviceEventEmitter.emit(Events.CHANNEL_SWITCH, true);
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});
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expect(result.current).toBe(true);
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act(() => {
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DeviceEventEmitter.emit(Events.CHANNEL_SWITCH, false);
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jest.runAllTimers();
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});
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expect(result.current).toBe(false);
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});
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it('should cleanup event listener on unmount', () => {
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const removeMock = jest.fn();
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jest.spyOn(DeviceEventEmitter, 'addListener').mockReturnValue({
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remove: removeMock,
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} as any);
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const {unmount} = renderHook(() => useChannelSwitch());
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unmount();
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expect(removeMock).toHaveBeenCalled();
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});
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});
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