public void TestSTPointN()
{
using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
{
const string Wkt = "LINESTRING(0 0, 1 1, 2 2)";
db.TestGeometries
.Value(g => g.Id, 1)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromText(Wkt))
.Insert();
Assert.AreEqual(
"POINT(0 0)",
db.TestGeometries
.Where(g => g.Id == 1)
.Select(g => g.Geometry.STPointN(1).STAsText())
.Single());
Assert.AreEqual(
"POINT(0 0)",
db.Select(() => GeometryAccessors.STPointN(Wkt, 1).STAsText()));
Assert.IsNull(db.Select(() => GeometryAccessors.STPointN((NTSG)null, 1)));
Assert.IsNull(db.Select(() => GeometryAccessors.STPointN("POINT(0 0)", 1)));
}
}