@Test
public void mergePropertiesUsesNewRsidIfOriginalAbsent() {

    AlleleProperties original = AlleleProperties.newBuilder()
            .putProperties("EXAC_AFR", 0.00056f)
            .build();
    AlleleProperties toMerge = AlleleProperties.newBuilder()
            .setRsId("rs45789")
            .putProperties("POLYPHEN", 1f).build();
    AlleleProperties expected = AlleleProperties.newBuilder()
            .setRsId("rs45789")
            .putProperties("EXAC_AFR", 0.00056f)
            .putProperties("POLYPHEN", 1f)
            .build();
    assertThat(AlleleConverter.mergeProperties(original, toMerge), equalTo(expected));
}