Created
January 30, 2018 16:02
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JS Bin // source http://jsbin.com/qobefifiwe
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS Bin</title> | |
| <script src="https://wzrd.in/standalone/expect@latest"></script> | |
| <script src="https://wzrd.in/standalone/deep-freeze@latest"></script> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| /* | |
| * Open the console to see | |
| * that all tests have passed. | |
| */ | |
| 'use strict'; | |
| function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } } | |
| var addCounter = function addCounter(list) { | |
| return [].concat(_toConsumableArray(list), [0]); | |
| }; | |
| var removeCounter = function removeCounter(list, index) { | |
| return list.filter(function (el, i) { | |
| return index !== i; | |
| }); | |
| }; | |
| var incrementCounter = function incrementCounter(list, index) { | |
| return list.map(function (item, localIndex) { | |
| return localIndex === index ? item + 1 : item; | |
| }); | |
| }; | |
| var testAddCounter = function testAddCounter() { | |
| var listBefore = []; | |
| var listAfter = [0]; | |
| deepFreeze(listBefore); | |
| expect(addCounter(listBefore)).toEqual(listAfter); | |
| }; | |
| var testRemoveCounter = function testRemoveCounter() { | |
| var listBefore = [0, 10, 20]; | |
| var listAfter = [0, 20]; | |
| deepFreeze(listBefore); | |
| expect(removeCounter(listBefore, 1)).toEqual(listAfter); | |
| }; | |
| var testIncrementCounter = function testIncrementCounter() { | |
| var listBefore = [0, 10, 20]; | |
| var listAfter = [0, 11, 20]; | |
| deepFreeze(listBefore); | |
| expect(incrementCounter(listBefore, 1)).toEqual(listAfter); | |
| }; | |
| testAddCounter(); | |
| testRemoveCounter(); | |
| testIncrementCounter(); | |
| console.log('All tests passed.'); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">/* | |
| * Open the console to see | |
| * that all tests have passed. | |
| */ | |
| const addCounter = (list) => { | |
| return [...list, 0]; | |
| }; | |
| const removeCounter = (list, index) => { | |
| return list.filter((el, i)=> index !==i); | |
| }; | |
| const incrementCounter = (list, index) => { | |
| return list.map((item, localIndex) => localIndex === index ? item + 1 : item) | |
| }; | |
| const testAddCounter = () => { | |
| const listBefore = []; | |
| const listAfter = [0]; | |
| deepFreeze(listBefore); | |
| expect( | |
| addCounter(listBefore) | |
| ).toEqual(listAfter); | |
| }; | |
| const testRemoveCounter = () => { | |
| const listBefore = [0, 10, 20]; | |
| const listAfter = [0, 20]; | |
| deepFreeze(listBefore); | |
| expect( | |
| removeCounter(listBefore, 1) | |
| ).toEqual(listAfter); | |
| }; | |
| const testIncrementCounter = () => { | |
| const listBefore = [0, 10, 20]; | |
| const listAfter = [0, 11, 20]; | |
| deepFreeze(listBefore); | |
| expect( | |
| incrementCounter(listBefore, 1) | |
| ).toEqual(listAfter); | |
| }; | |
| testAddCounter(); | |
| testRemoveCounter(); | |
| testIncrementCounter(); | |
| console.log('All tests passed.'); | |
| </script></body> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /* | |
| * Open the console to see | |
| * that all tests have passed. | |
| */ | |
| 'use strict'; | |
| function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } } | |
| var addCounter = function addCounter(list) { | |
| return [].concat(_toConsumableArray(list), [0]); | |
| }; | |
| var removeCounter = function removeCounter(list, index) { | |
| return list.filter(function (el, i) { | |
| return index !== i; | |
| }); | |
| }; | |
| var incrementCounter = function incrementCounter(list, index) { | |
| return list.map(function (item, localIndex) { | |
| return localIndex === index ? item + 1 : item; | |
| }); | |
| }; | |
| var testAddCounter = function testAddCounter() { | |
| var listBefore = []; | |
| var listAfter = [0]; | |
| deepFreeze(listBefore); | |
| expect(addCounter(listBefore)).toEqual(listAfter); | |
| }; | |
| var testRemoveCounter = function testRemoveCounter() { | |
| var listBefore = [0, 10, 20]; | |
| var listAfter = [0, 20]; | |
| deepFreeze(listBefore); | |
| expect(removeCounter(listBefore, 1)).toEqual(listAfter); | |
| }; | |
| var testIncrementCounter = function testIncrementCounter() { | |
| var listBefore = [0, 10, 20]; | |
| var listAfter = [0, 11, 20]; | |
| deepFreeze(listBefore); | |
| expect(incrementCounter(listBefore, 1)).toEqual(listAfter); | |
| }; | |
| testAddCounter(); | |
| testRemoveCounter(); | |
| testIncrementCounter(); | |
| console.log('All tests passed.'); |
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