@Test
public void testCreateVariantContextsSingleAlleles() {

    Path vcfPath = Paths.get("src/test/resources/smallTest.vcf");
    long numVariants;
    try (Stream<VariantContext> variantStream = VcfFiles.readVariantContexts(vcfPath)) {
        numVariants = variantStream.count();
    }
    assertThat(numVariants, equalTo(3L));
}