public void TestSTIsClosed() { using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString)) { const string Wkt1 = "LINESTRING(0 0, 1 1)"; db.TestGeometries.Value(g => g.Id, 1).Value(g => g.Geometry, () => GeometryInput.STGeomFromText(Wkt1)).Insert(); const string Wkt2 = "LINESTRING(0 0, 0 1, 1 1, 0 0)"; db.TestGeometries.Value(g => g.Id, 2).Value(g => g.Geometry, () => GeometryInput.STGeomFromText(Wkt2)).Insert(); db.TestGeometries.Value(g => g.Id, 3).Value(g => g.Geometry, () => null).Insert(); Assert.IsFalse(db.TestGeometries .Where(g => g.Id == 1) .Select(g => g.Geometry.STIsClosed()) .Single()); Assert.IsTrue(db.TestGeometries .Where(g => g.Id == 2) .Select(g => g.Geometry.STIsClosed()) .Single()); Assert.IsFalse(db.Select(() => GeometryAccessors.STIsClosed(Wkt1))); Assert.IsTrue(db.Select(() => GeometryAccessors.STIsClosed(Wkt2))); Assert.IsNull(db.TestGeometries .Where(g => g.Id == 3) .Select(g => g.Geometry.STIsClosed()) .Single()); } }