@Test
public void markRow() throws Exception {

    CompatibilityMatrix m = new CompatibilityMatrix(5, 5);
    m.set(0, 1);
    m.set(0, 2);
    m.set(0, 4);
    assertThat(m.fix()[0], is(new int[]{0, 1, 1, 0, 1}));
    m.markRow(0, -1);
    assertThat(m.fix()[0], is(new int[]{0, -1, -1, 0, -1}));
}