@Test
public void testParity_Four_NNNN() {

    Point2d[] coords = new Point2d[]{new Point2d(-7.75, 5.79), // -O
            new Point2d(-6.42, 3.48), // -N
            new Point2d(-9.09, 3.48), // -C
            new Point2d(-9.09, 5.02), // -H
    };
    int[] elev = new int[]{0, 0, 0, 0}; // no wedge/hatch bonds
    GeometricParity parity = new Tetrahedral2DParity(coords, elev);
    org.hamcrest.MatcherAssert.assertThat(parity.parity(), is(NONE));
}