ok-testing-reloaded-medium

TwitterApi.java

/**
 * Retrofit interface for Twitter REST API
 */
public interface TwitterApi {

  @GET("statuses/home_timeline.json")
  Call<ResponseBody> homeTimeline();

  @GET("statuses/show/:id")
  Call<ResponseBody> show(@Path("id") String id);

  @POST("statuses/update")
  Call<ResponseBody> tweet(@Query("status") String status);

  class Builder {
    private String baseUrl;

    public Builder() {}

    public Builder baseUrl(String baseUrl) {
      this.baseUrl = baseUrl;

      return this;
    }

    public TwitterApi build() {
      return new Retrofit.Builder()
        .baseUrl(baseUrl)
        .build()
        .create(TwitterApi.class);
    }
  }
}

TwitterApiTest.java

public class TwitterApiTest {

  @Rule
  public MockWebServerPlus server = new MockWebServerPlus();

  @Test
  public void homeTimeline() throws IOException, InterruptedException {
    // replay scripted http response from yaml file
    server.enqueue("twitter/statuses/home_timeline");

    // execute request
    final TwitterApi twitterApi = new TwitterApi.Builder()
      .baseUrl(server.url("/"))
      .build();
    final Response<ResponseBody> response = twitterApi.homeTimeline().execute();

    // assert response
    assertThat(response.code()).isEqualTo(200);
    assertThat(response.body().string()).startsWith("[\n  {\n    \"coordinates\"");

    // verify request
    final RecordedRequest recordedRequest = server.takeRequest();
    assertThat(recordedRequest.getMethod()).isEqualTo("GET");
    assertThat(recordedRequest.getPath()).isEqualTo("/statuses/home_timeline.json");
  }

}