public void TestST3DDistance() { using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString)) { Assert.AreEqual( 1.732, db.Select(() => MeasurementFunctions.ST3DDistance( "POINT(0 0 0)", "POINT(1 1 1)")).Value, 1.0E-3); Assert.IsNull(db.Select(() => MeasurementFunctions.ST3DDistance((NTSG)null, (NTSG)null))); } }