@Test
void shouldContainEmptyJobPlaceHolder() {

    JenkinsFacade jenkins = mock(JenkinsFacade.class);
    ModelValidation model = new ModelValidation(jenkins);
    ComboBoxModel actualModel = model.getAllJobs();
    assertThat(actualModel).hasSize(1);
    assertThat(actualModel).containsExactly(NO_REFERENCE_JOB);
}