@Test
public void get2DCoordinateCoverage_EmptyAtomContainer() {

    IAtomContainer container = new AtomContainer();
    Assert.assertEquals(GeometryTools.CoordinateCoverage.NONE, GeometryTools.get2DCoordinateCoverage(container));
    Assert.assertEquals(GeometryTools.CoordinateCoverage.NONE,
            GeometryTools.get2DCoordinateCoverage((IAtomContainer) null));
}