@Test
	public void testUnion() {
		assertThat(uf.connected(0, 1), is(not(true)));
		
		uf.union(0, 1);
		uf.union(0, 2);
		
		assertThat(uf.connected(0, 1), is(true));
		assertThat(uf.connected(1, 2), is(true));
	}