Created
October 2, 2018 00:12
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JS Bin // source https://jsbin.com/keqivoqohe
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta name="description" content="[add your bin description]"> | |
| <script src="https://unpkg.com/expect@%3C21/umd/expect.min.js"></script> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| 'use strict'; | |
| var counter = function counter(state, action) { | |
| if (state === undefined) state = 0; | |
| switch (action.type) { | |
| case 'INCREMENT': | |
| return state + 1; | |
| case 'DECREMENT': | |
| return state - 1; | |
| default: | |
| return state; | |
| } | |
| }; | |
| expect(counter(0, { type: 'INCREMENT' })).toEqual(1); | |
| expect(counter(1, { type: 'INCREMENT' })).toEqual(2); | |
| expect(counter(2, { type: 'DECREMENT' })).toEqual(1); | |
| expect(counter(1, { type: 'DECREMENT' })).toEqual(0); | |
| expect(counter(1, { type: 'SOMETHING_ELSE' })).toEqual(1); | |
| expect(counter(undefined, {})).toEqual(0); | |
| console.log('Tests passed!'); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">const counter = (state = 0, action) => { | |
| switch (action.type) { | |
| case 'INCREMENT': | |
| return state + 1; | |
| case 'DECREMENT': | |
| return state - 1; | |
| default: | |
| return state; | |
| } | |
| } | |
| expect( | |
| counter(0, { type: 'INCREMENT' }) | |
| ).toEqual(1); | |
| expect( | |
| counter(1, { type: 'INCREMENT' }) | |
| ).toEqual(2); | |
| expect( | |
| counter(2, { type: 'DECREMENT' }) | |
| ).toEqual(1); | |
| expect( | |
| counter(1, { type: 'DECREMENT' }) | |
| ).toEqual(0); | |
| expect( | |
| counter(1, { type: 'SOMETHING_ELSE' }) | |
| ).toEqual(1); | |
| expect( | |
| counter(undefined, {}) | |
| ).toEqual(0); | |
| console.log('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
| 'use strict'; | |
| var counter = function counter(state, action) { | |
| if (state === undefined) state = 0; | |
| switch (action.type) { | |
| case 'INCREMENT': | |
| return state + 1; | |
| case 'DECREMENT': | |
| return state - 1; | |
| default: | |
| return state; | |
| } | |
| }; | |
| expect(counter(0, { type: 'INCREMENT' })).toEqual(1); | |
| expect(counter(1, { type: 'INCREMENT' })).toEqual(2); | |
| expect(counter(2, { type: 'DECREMENT' })).toEqual(1); | |
| expect(counter(1, { type: 'DECREMENT' })).toEqual(0); | |
| expect(counter(1, { type: 'SOMETHING_ELSE' })).toEqual(1); | |
| expect(counter(undefined, {})).toEqual(0); | |
| console.log('Tests passed!'); |
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