Class CallTest

retrofit/java-test/src/test/java/retrofit2/CallTest.java:53–1521

import retrofit2.http.Streaming;

public final class CallTest {
  @Rule public final MockWebServer server = new MockWebServer();

  interface Service {
    @GET("/")
    Call<String> getString();

    @GET("/")
    Call<ResponseBody> getBody();

    @GET("/")
    @Streaming
    Call<ResponseBody> getStreamingBody();

    @POST("/")
    Call<String> postString(@Body String body);

    @POST("/{a}")
    Call<String> postRequestBody(@Path("a") Object a);
  }

  @Test
  public void http200Sync() throws IOException {
    Retrofit retrofit =
        new Retrofit.Builder()
            .baseUrl(server.url("/"))
            .addConverterFactory(new ToStringConverterFactory())
            .build();
    Service example = retrofit.create(Service.class);

    server.enqueue(new MockResponse().setBody("Hi"));

    Response<String> response = example.getString().execute();
    assertThat(response.isSuccessful()).isTrue();
    assertThat(response.body()).isEqualTo("Hi");
  }

  @Test
  public void http200Async() throws InterruptedException {
    Retrofit retrofit =
        new Retrofit.Builder()
            .baseUrl(server.url("/"))
            .addConverterFactory(new ToStringConverterFactory())
            .build();
    Service example = retrofit.create(Service.class);

    server.enqueue(new MockResponse().setBody("Hi"));

    final AtomicReference<Response<String>> responseRef = new AtomicReference<>();
    final CountDownLatch latch = new CountDownLatch(1);
    example
        .getString()
        .enqueue(
            new Callback<String>() {
              @Override
              public void onResponse(Call<String> call, Response<String> response) {
                responseRef.set(response);
                latch.countDown();