@Test
public void testGetAncestor() throws Exception {
Path path = Path.fromDotString("1.2.3");
Assert.assertThat(path.getAncestor(3), is(Path.fromDotString("1.2.3")));
Assert.assertThat(path.getAncestor(2), is(Path.fromDotString("1.2")));
Assert.assertThat(path.getAncestor(1), is(Path.fromDotString("1")));
Assert.assertThat(path.getAncestor(0), is(Path.fromDotString("")));
}
@Test(expected = IllegalArgumentException.class)
public void testGetAncestorIndexGreateThanSize() throws Exception {
Path path = Path.fromDotString("1.2.3");
path.getAncestor(5);
}
@Test(expected = IllegalArgumentException.class)
public void testGetAncestorNegativeIndex() throws Exception {
Path path = Path.fromDotString("1.2.3");
path.getAncestor(-1);
}
