Created
September 25, 2017 12:39
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Now with mocking
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| import { expect } from 'chai'; | |
| import 'mocha'; | |
| import { mock, instance, when, anyString, verify } from "ts-mockito"; | |
| class HelloEndpoint { | |
| constructor(private service: HelloService) {} | |
| async handle(evt: any): Promise<any> { | |
| const greeting = await this.service.sayHello(evt.queryStringParameters.name); | |
| return { | |
| body: greeting | |
| }; | |
| } | |
| } | |
| // Concrete implementation | |
| class HelloService { | |
| async sayHello(name: string): Promise<string> { | |
| throw Error("Not implemented yet") | |
| } | |
| } | |
| const mockedHelloService: HelloService = mock(HelloService); | |
| const helloService: HelloService = instance(mockedHelloService); | |
| when(mockedHelloService.sayHello(anyString())) | |
| .thenCall(name => Promise.resolve(`Hello, ${name}!`)); | |
| const helloEndpoint = new HelloEndpoint(helloService); | |
| describe("The Hello Endpoint", () => { | |
| it("Should greet the person", async () => { | |
| // Call the endpoint. | |
| const result = await helloEndpoint.handle({ | |
| queryStringParameters: { | |
| name: "Arthur Putey" | |
| } | |
| }); | |
| // Validate that the right data is passed into the service. | |
| verify(mockedHelloService.sayHello("Arthur Putey")).once(); | |
| // Validate that the right response is returned to the client. | |
| expect(result.body).to.equal("Hello, Arthur Putey!"); | |
| }); | |
| }); |
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