@Test
public void return_all_direct_known_ancestors_of_a_vertex() {
createSimpleGraph();
assertThat(matrix.getAncestors(1).toString(), is("{0, 4}"));
assertThat(matrix.getAncestors(2).toString(), is("{0}"));
assertThat(matrix.getAncestors(3).toString(), is("{2}"));
assertThat(matrix.getAncestors(4).toString(), is("{3}"));
}
@Test
public void return_all_direct_known_ancestors_of_a_vertex_set() {
createSimpleGraph();
BitSet query = new BitSet();
query.set(1);
query.set(2);
assertThat(matrix.getAncestors(query).toString(), is("{0, 4}"));
}
