ce5c30e9ca
* [MM-9454] Added jest-enzyme to devDependencies * [MM-9454] Refactored SendButton as component * [MM-9454] Added fade to SendButton * [MM-9454] Changed Fade to PureComponent
78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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import React from 'react';
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import {Animated, Text} from 'react-native';
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import {shallow} from 'enzyme';
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import Fade, {FADE_DURATION} from './fade';
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jest.useFakeTimers();
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describe('Fade', () => {
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const baseProps = {
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visible: true,
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disabled: true,
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};
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function getWrapper(props = {}) {
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const dummyText = 'text';
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return shallow(
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<Fade
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{...baseProps}
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{...props}
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>
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<Text>{dummyText}</Text>
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</Fade>
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);
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}
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function getAnimValue(begin, end) {
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const animValue = new Animated.Value(begin);
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animValue.setValue(end);
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animValue.stopTracking();
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return animValue;
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}
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test('should render {opacity: 1}', () => {
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const wrapper = getWrapper({visible: true});
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expect(wrapper.getElement()).toMatchSnapshot();
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expect(wrapper).toHaveStyle('opacity', new Animated.Value(1));
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});
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test('should render {opacity: 0}', () => {
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const wrapper = getWrapper({visible: false});
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expect(wrapper.getElement()).toMatchSnapshot();
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expect(wrapper).toHaveStyle('opacity', new Animated.Value(0));
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});
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test('should change opacity from 1 to 0', () => {
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const wrapper = getWrapper({visible: true});
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expect(wrapper).toHaveStyle('opacity', new Animated.Value(1));
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wrapper.setProps({visible: false});
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jest.advanceTimersByTime(FADE_DURATION);
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expect(wrapper).toHaveStyle('opacity', getAnimValue(1, 0));
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});
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test('should not change opacity when disabled flag is switched', () => {
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const wrapper = getWrapper({disabled: false});
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expect(wrapper).toHaveStyle('opacity', new Animated.Value(1));
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wrapper.setProps({disabled: true});
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expect(wrapper).toHaveStyle('opacity', new Animated.Value(1));
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});
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test('should not change opacity when props stay the same', () => {
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const wrapper = getWrapper({visible: true});
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expect(wrapper).toHaveStyle('opacity', new Animated.Value(1));
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wrapper.setProps({visible: true});
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expect(wrapper).toHaveStyle('opacity', new Animated.Value(1));
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});
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});
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