android - 在 Retrofit 2.0 中使用 Mockito

Question

我正在尝试使用 Mockito 为我的 api 调用(通过 Retrofit 2.0 进行)创建单元测试。

这似乎是关于将 Mockito 与 Retrofit 结合使用的最受欢迎的博客。

http://mdswanson.com/blog/2013/12/16/reliable-android-http-testing-with-retrofit-and-mockito.html

不幸的是，它使用了早期版本的Retrofit，并且依赖于 Callbacks 和 RetrofitError，它们从 2.0 开始停止。

您如何使用 Retrofit 2.0 做到这一点？

P.S.:我正在使用 RxJava 和 retrofit，所以可以与 RxJava 一起使用的东西会很棒。谢谢!

Answer 1

在 Retrofit 的官方存储库中有一个有用的示例: https://github.com/square/retrofit/tree/master/retrofit-mock

我还发现:https://touk.pl/blog/2014/02/26/mock-retrofit-using-dagger-and-mockito/

在这里你会找到这个 fragment :

Unit Tests

During develop of app, you can send requests the server all time(or most of time) so it is possible to live without mocked server, it sucks but is possible. Unfortunately you are not able to write good tests without the mock. Below there are two unit tests. Actually they do not test anything but in simple way shows how to mock Retrofit service using Mockito and Dagger.

    @RunWith(RobolectricTestRunner.class)
public class EchoServiceTest {

    @Inject
    protected EchoService loginService;

    @Inject
    protected Client client;

    @Before
    public void setUp() throws Exception {
        Injector.add(new AndroidModule(), 
                     new RestServicesModule(),
                     new RestServicesMockModule(),
                     new TestModule());
        Injector.inject(this);
    }

    @Test
    public void shouldReturnOfferInAsyncMode() throws IOException {
        //given
        int expectedQuantity = 765;
        String responseContent = "{" +
                "   \"message\": \"mock message\"," +
                "   \"quantity\": \"" + expectedQuantity + "\"" +
                "}";
        mockResponseWithCodeAndContent(200, responseContent);

        //when
        EchoResponse echoResponse = loginService.getMessageAndQuantity("test", "test");

        //then
        assertThat(echoResponse.getQuantity()).isEqualTo(expectedQuantity);
    }

    @Test
    public void shouldReturnOfferInAsyncModea() throws IOException {
        //given
        int expectedQuantity = 2;
        String responseContent = "{" +
                "   \"message\": \"mock message\"," +
                "   \"quantity\": \"" + expectedQuantity + "\"" +
                "}";
        mockResponseWithCodeAndContent(200, responseContent);

        //when
        EchoResponse echoResponse = loginService.getMessageAndQuantity("test", "test");

        //then
        assertThat(echoResponse.getQuantity()).isEqualTo(expectedQuantity);
    }


    protected void mockResponseWithCodeAndContent(int httpCode, String content) throws IOException {
        Response response = createResponseWithCodeAndJson(httpCode, content);
        when(client.execute(Matchers.anyObject())).thenReturn(response);
    }

    private Response createResponseWithCodeAndJson(int responseCode, String json) {
        return new Response(responseCode, "nothing", Collections.EMPTY_LIST, new TypedByteArray("application/json", json.getBytes()));
    }

另请阅读:Square retrofit server mock for testing

希望对你有帮助