Created
May 26, 2021 18:21
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Test private class method with Jest
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| import { Request, Response } from 'express'; | |
| import GetAllUsers from './getAllUsers'; | |
| describe('Get all users request', () => { | |
| let mockRequest: Partial<Request>; | |
| let mockResponse: Partial<Response>; | |
| let responseObject = {}; | |
| beforeEach(() => { | |
| mockRequest = { | |
| }; | |
| mockResponse = { | |
| statusCode: 0, | |
| send: jest.fn().mockImplementation((result) => { | |
| responseObject = result; | |
| }) | |
| }; | |
| }); | |
| test('200 - users', async () => { | |
| const expectedStatusCode = 200; | |
| const expectedReponse = { | |
| users: [ | |
| { | |
| name: 'JOHN', | |
| age: 30 | |
| }, | |
| { | |
| name: 'Peter', | |
| age: 40 | |
| } | |
| ] | |
| }; | |
| const userRoute = new GetAllUsers(); | |
| let spy = jest.spyOn(userRoute, 'changeUserName' as any); | |
| userRoute.handle(mockRequest as Request, mockResponse as Response); | |
| expect(mockResponse.statusCode).toBe(expectedStatusCode); | |
| expect(responseObject).toEqual(expectedReponse); | |
| expect(spy).toHaveBeenCalledWith("John"); | |
| expect(spy).toHaveBeenCalledTimes(1); | |
| }); | |
| }); |
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| import { Request, Response } from 'express'; | |
| class GetAllUsers { | |
| public handle(request: Request, response: Response) { | |
| const users = [ | |
| { | |
| name: this.changeUserName('John'), | |
| age: 30 | |
| }, | |
| { | |
| name: 'Peter', | |
| age: 40 | |
| } | |
| ] | |
| response.statusCode = 200; | |
| response.send({ users }); | |
| } | |
| private changeUserName(userName: string) { | |
| return userName.toUpperCase(); | |
| } | |
| } | |
| export default GetAllUsers; |
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