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());
}
}