2019-03-18 17:22:41 +03:00
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/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @emails oncall+react_native
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*/
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'use strict';
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describe('mergeIntoFast', () => {
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2019-05-08 18:44:25 +03:00
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const mergeIntoFast = require('../mergeIntoFast');
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2019-03-18 17:22:41 +03:00
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it('should merge two objects', () => {
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const a = {fontScale: 2, height: 1334};
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const b = {scale: 2, width: 750};
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mergeIntoFast(a, b);
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expect(a).toEqual({fontScale: 2, height: 1334, scale: 2, width: 750});
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});
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it('should use the values of the second object if there are duplicate keys', () => {
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const a = {fontScale: 2};
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const b = {fontScale: 3};
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mergeIntoFast(a, b);
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expect(a).toEqual({fontScale: 3});
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});
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it('should merge into an empty object', () => {
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const a = {};
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const b = {scale: 2, width: 750};
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mergeIntoFast(a, b);
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expect(a).toEqual({scale: 2, width: 750});
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});
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it('should merge from an empty object', () => {
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const a = {scale: 2, width: 750};
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const b = {};
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mergeIntoFast(a, b);
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expect(a).toEqual({scale: 2, width: 750});
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});
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});
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