  @Test
  public void no_match_when_edge_doesnt_have_flipped_partner() throws Exception {

    given(matcher = matchesSolid(
        v(0, 0, 0),
        v(1, 0, 0),
        v(0, 1, 0),
        v(1, 1, 0)));
    when(matcher.matches(solid(
        poly(v(0, 0, 0), v(1, 0, 0), v(1, 1, 0), v(0, 1, 0)),
        poly(v(0, 0, 0), v(0, 1, 0), v(1, 0, 0)))));
    thenReturned(false);
  }