@Test
public void getFirstHalfMatrixStringTest() {

    int n = 3;
    Graph g = new Graph(n);
    g.connectionTable = new int[][]{{0, 0, 1}, {0, 0, 1}, {1, 1, 0}};
    PermutationGroup group = new PermutationGroup(n);
    MockRefiner refiner = new MockRefiner(g);
    setup(refiner, group, g);
    refiner.refine(Partition.unit(n));
    String hms = refiner.getFirstHalfMatrixString();
    String expected = "110";
    Assert.assertEquals(expected, hms);
}