Created
March 10, 2016 12:32
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JS Bin // source http://jsbin.com/xaveragopa
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="https://npmcdn.com/expect/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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