public void TestSimplifyBadPoly()
{
var geom = new WKTReader().Read("POLYGON ((1 1, 1 1, 1 1, 1 1, 1 1))");
var geom2 = new Polygon(new LinearRing(new Coordinate[]
{
new Coordinate(1, 1),
new Coordinate(1, 1),
new Coordinate(1, 1),
new Coordinate(1, 1),
new Coordinate(1, 1)
}));
Debug.WriteLine("Bad polygon: " + geom);
var simple = DouglasPeuckerSimplifier.Simplify(geom, 0.1);
Debug.WriteLine("Simple bad polygon: " + simple);
Assert.AreEqual(geom.GetType(), simple.GetType());
Assert.AreNotEqual(geom, simple, "Simplify didn't do anything to this invalid polygon.");
// This happens with JTS 1.9.0, 1.8.0 still returns GeometryCollection.Empty
Assert.AreEqual(geom.GetType(), Polygon.Empty);
}