app.get('/playground', handler);http://localhost:9000/playground
Request URL: http://localhost:9000/playground
Request Method: GET
Status Code: 200 OK{"message":"OK"}http://localhost:9000/playground?error=KO
Request URL: http://localhost:9000/playground?error=KO
Request Method: GET
Status Code: 500 Internal Server Error{"message":"KO"}| async function handler({ query: { error } }, res) { | |
| if (error) { | |
| return res.status(500).send({ message: error }); | |
| } | |
| return res.status(200).send({ message: 'OK' }); | |
| } | |
| module.exports = handler; |
| const handler = require('./handler'); | |
| describe('handler', () => { | |
| const scenarios = [ | |
| { | |
| description: 'w/o error', | |
| error: null, | |
| status: 200 | |
| }, | |
| { | |
| description: 'w/ error', | |
| error: 'Oh Noes!', | |
| status: 500 | |
| } | |
| ]; | |
| scenarios.forEach(({ description, error, status }) => { | |
| it(description, async () => { | |
| const req = { query: { error } }; | |
| const res = { | |
| send: jest.fn(), | |
| status: jest.fn(() => res) | |
| }; | |
| await handler(req, res); | |
| expect(res.status).toBeCalledWith(status); | |
| expect(res.send.mock.calls[0][0]).toMatchSnapshot(); | |
| }); | |
| }); | |
| }); |
| // Jest Snapshot v1, https://goo.gl/fbAQLP | |
| exports[`handler w/ error 1`] = ` | |
| Object { | |
| "message": "Oh Noes!", | |
| } | |
| `; | |
| exports[`handler w/o error 1`] = ` | |
| Object { | |
| "message": "OK", | |
| } | |
| `; |
Yes, this is a very good example. One question if we don't pass the status mock function to your mock response then what will happen?
Very nice example. It saves me a lot of time