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Code from the "Dependency Injection Basics" episode of Fun Fun Function
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| const assert = require('assert') | |
| function getAnimals(fetch, id) { | |
| return fetch('http://api.animalfarmgame.com/animals/' + id) | |
| .then(response => response.json()) | |
| .then(data => data.results[0]) | |
| } | |
| describe('getAnimals', () => { | |
| it('calls fetch with the correct url', () => { | |
| const fakeFetch = url => { | |
| assert( | |
| url === | |
| 'http://api.animalfarmgame.com/animals/123' | |
| ) | |
| return new Promise(function(resolve) { | |
| }) | |
| } | |
| getAnimals(fakeFetch, 123) | |
| }) | |
| it('parses the response of fetch correctly', (done) => { | |
| const fakeFetch = () => { | |
| return Promise.resolve({ | |
| json: () => Promise.resolve({ | |
| results: [ | |
| { name: 'fluffykins' } | |
| ] | |
| }) | |
| }) | |
| } | |
| getAnimals(fakeFetch, 12345) | |
| .then(result => { | |
| assert(result.name === 'fluffykins') | |
| done() | |
| }) | |
| }) | |
| }) |
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