@Test
public void exacAlleleResource() throws Exception {

    AlleleResource alleleResource = instance.exacAlleleResource();
    AlleleArchive expectedArchive = new TabixAlleleArchive(Paths.get("src/test/resources/hg19/variants/ExAC.r0.3.1.sites.vep.vcf.gz"));
    assertThat(alleleResource.getAlleleParser(), instanceOf(ExacAlleleParser.class));
    ExacExomeAlleleParser exacAlleleParser = (ExacExomeAlleleParser) alleleResource.getAlleleParser();
    assertThat(exacAlleleParser.getPopulationKeys(), equalTo(ExacPopulationKey.EXAC_EXOMES));
    assertThat(alleleResource.getAlleleArchive(), equalTo(expectedArchive));
}