@Test
  public void onSomeSavedStops_shouldHaveSavedStops() {
    when(settings.getString("saved_stops", "")).thenReturn("1_123,1_456,1_789");

    assertThat(subject.getSavedStops())
        .isEqualTo(
            new ArrayList<String>() {
              {
                add("1_123");
                add("1_456");
                add("1_789");
              }
            });
  }
  @Test
  public void onNoSavedStops_shouldHaveEmptyList() {
    when(settings.getString("saved_stops", "")).thenReturn("");

    assertThat(subject.getSavedStops().size()).isEqualTo(0);
  }