assertThat(new RelativePath(false, "a").getParent(), equalTo(new RelativePath(false)));
        assertThat(new RelativePath(false).getParent(), nullValue());
    }

    @Test
    public void canReplaceLastName() {
        assertPathContains(new RelativePath(true, "old").replaceLastName("new"), true, "new");
        assertPathContains(new RelativePath(false, "old").replaceLastName("new"), false, "new");