@Test
public void interesectEdges() {

  final GeometryHullTool.Edge e1 =
      new GeometryHullTool.Edge(new Coordinate(20.0, 20.0), new Coordinate(21.5, 21), 0);
  final GeometryHullTool.Edge e2 =
      new GeometryHullTool.Edge(new Coordinate(20.4, 19.0), new Coordinate(21.0, 22), 0);
  assertTrue(GeometryHullTool.edgesIntersect(e1, e2));
  final GeometryHullTool.Edge e3 =
      new GeometryHullTool.Edge(new Coordinate(20.4, 19.0), new Coordinate(21.0, 19.5), 0);
  assertTrue(!GeometryHullTool.edgesIntersect(e1, e3));
}