72 строки
1.6 KiB
JavaScript
72 строки
1.6 KiB
JavaScript
/**
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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('mapWithSeparator', () => {
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const mapWithSeparator = require('../mapWithSeparator');
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it('mapWithSeparator returns expected results', () => {
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const array = [1, 2, 3];
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const result = mapWithSeparator(
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array,
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function(value) {
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return value * 2;
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},
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function() {
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return 0;
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},
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);
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expect(result).toEqual([2, 0, 4, 0, 6]);
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});
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it('mapWithSeparator indices are correct', () => {
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const array = [1, 2, 3];
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const result = mapWithSeparator(
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array,
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function(value, index) {
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return index;
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},
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function(index) {
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return index;
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},
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);
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expect(result).toEqual([0, 0, 1, 1, 2]);
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});
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it('mapWithSeparator passes correct array and indices', () => {
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const array = [3, 2, 1];
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const result = mapWithSeparator(
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array,
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function(value, index, arr) {
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return arr[index];
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},
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function(index) {
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return index;
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},
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);
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expect(result).toEqual([3, 0, 2, 1, 1]);
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});
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it('mapWithSeparator returns empty array when empty array is given as input', () => {
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const array = [];
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const result = mapWithSeparator(
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array,
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function(value) {
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return value * 2;
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},
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function() {
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return 0;
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},
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);
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expect(result).toEqual([]);
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});
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});
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