public void TestSTAngle()
{
using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
{
var p1 = db.Select(() => GeometryConstructors.STPoint(0, 0));
var p2 = db.Select(() => GeometryConstructors.STPoint(100, 100));
var p3 = db.Select(() => GeometryConstructors.STPoint(0, 0));
var p4 = db.Select(() => GeometryConstructors.STPoint(100, 0));
var a1 = db.Select(() => MathematicalFunctions.Degrees(MeasurementFunctions.STAngle(p1, p2, p3, p4)));
Assert.AreEqual(45, a1.Value, 1.0E-8);
var a2 = db.Select(() => MathematicalFunctions.Degrees(MeasurementFunctions.STAngle(p2, p1, p4)));
Assert.AreEqual(45, a2.Value, 1.0E-8);
Assert.IsNull(db.Select(() => MeasurementFunctions.STAngle(p1, p1, p1, p1)));
}
}
