@Test
public void testAbsolutize() {

    DMRLocationResolver resolver = new DMRLocationResolver();
    DMRNodeLocation abs;
    abs = resolver.absolutize(null, DMRNodeLocation.of("/two=2/three=3"));
    Assert.assertEquals("/two=2/three=3", abs.toString());
    abs = resolver.absolutize(DMRNodeLocation.of("/two=2/three=3"), (DMRNodeLocation) null);
    Assert.assertEquals("/two=2/three=3", abs.toString());
    abs = resolver.absolutize(DMRNodeLocation.empty(), DMRNodeLocation.of("/two=2/three=3"));
    Assert.assertEquals("/two=2/three=3", abs.toString());
    abs = resolver.absolutize(DMRNodeLocation.of("/one=1"), DMRNodeLocation.of("/two=2/three=3"));
    Assert.assertEquals("/one=1/two=2/three=3", abs.toString());
}