  @Test public void When_Read_Then_Return_Data() {

    saveMock();

    TestObserver<Mock> observer = cacheProvider.read().test();
    observer.awaitTerminalEvent();

    observer.assertValueCount(1);
    observer.assertNoErrors();
    observer.assertComplete();
    assertThat(observer.values()
        .get(0).getMessage(), is(MESSAGE));
  }