@Test
void testIsHomRef() {

    assertThat(SampleGenotype.homRef().isHomRef(), is(true));
    assertThat(SampleGenotype.of(AlleleCall.REF).isHomRef(), is(true));
    assertThat(SampleGenotype.of(AlleleCall.REF, AlleleCall.REF).isHomRef(), is(true));
    assertThat(SampleGenotype.of(AlleleCall.REF, AlleleCall.REF, AlleleCall.REF).isHomRef(), is(true));
    assertThat(SampleGenotype.phased(AlleleCall.REF, AlleleCall.REF).isHomRef(), is(true));
    assertThat(SampleGenotype.of(AlleleCall.REF, AlleleCall.NO_CALL).isHomRef(), is(false));
    assertThat(SampleGenotype.empty().isHomRef(), is(false));
    assertThat(SampleGenotype.het().isHomRef(), is(false));
    assertThat(SampleGenotype.homAlt().isHomRef(), is(false));
}