@Test
public void getVariantContext() {

    VariantContext builtContext = instance.getVariantContext();
    assertThat(builtContext.getContig(), equalTo(CHROMOSOME_NAME));
    assertThat(builtContext.getStart(), equalTo(POSITION));
    assertThat(builtContext.getEnd(), equalTo(POSITION));
    assertThat(builtContext.getNAlleles(), equalTo(2));
    assertThat(builtContext.getReference().getBaseString(), equalTo(instance.getRef()));
    assertThat(builtContext.getAlternateAllele(instance.getAltAlleleId()).getBaseString(), equalTo(instance.getAlt()));
}