Mock Retrofit2 service interface.

gistfile1.txt

public interface GitHubService {
  @GET("users/{user}/repos")
  Call<List<Repo>> listRepos(@Path("user") String user);
}

class MockCall<T> implements Call<T> {
		@Override
		public Response<T> execute() throws IOException { return null; }

		@Override
		public void enqueue(Callback<T> callback) {
		}

		@Override public boolean isExecuted() { return false; }

		@Override
		public void cancel() { }

		@Override
		public boolean isCanceled() {
			return false;
		}

		@Override
		public Call<T> clone() {
			return null;
		}

		@Override
		public Request request() {
			return null;
		}
	};