53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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'use strict';
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jest.autoMockOff();
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var flattenStyle = require('flattenStyle');
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describe('flattenStyle', () => {
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it('should merge style objects', () => {
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var style1 = {width: 10};
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var style2 = {height: 20};
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var flatStyle = flattenStyle([style1, style2]);
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expect(flatStyle.width).toBe(10);
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expect(flatStyle.height).toBe(20);
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});
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it('should override style properties', () => {
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var style1 = {backgroundColor: '#000', width: 10};
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var style2 = {backgroundColor: '#023c69', width: null};
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var flatStyle = flattenStyle([style1, style2]);
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expect(flatStyle.backgroundColor).toBe('#023c69');
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expect(flatStyle.width).toBe(null);
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});
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it('should overwrite properties with `undefined`', () => {
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var style1 = {backgroundColor: '#000'};
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var style2 = {backgroundColor: undefined};
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var flatStyle = flattenStyle([style1, style2]);
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expect(flatStyle.backgroundColor).toBe(undefined);
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});
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it('should not fail on falsy values', () => {
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expect(() => flattenStyle([null, false, undefined])).not.toThrow();
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});
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it('should recursively flatten arrays', () => {
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var style1 = {width: 10};
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var style2 = {height: 20};
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var style3 = {width: 30};
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var flatStyle = flattenStyle([null, [], [style1, style2], style3]);
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expect(flatStyle.width).toBe(30);
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expect(flatStyle.height).toBe(20);
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});
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});
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