public void Test_GetApproxArea_TwoFullPolygons()
 {
     Assert.Equal(8 * Math.PI, S2ShapeIndexMeasures.GetApproxArea(MakeIndexOrDie("# # full | full")));
 }
 public void Test_GetApproxArea_Empty()
 {
     Assert.Equal(0.0, S2ShapeIndexMeasures.GetApproxArea(MakeIndexOrDie("# #")));
 }