using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnitTestSharp;
using Lodestone;
using Lodestone.Shapes;
using Microsoft.Xna.Framework;

namespace Lodestone.UnitTests
{
    class TrapezoidTests : TestFixture
    {

        Trapezoid trapezoid;

        public override void TestSetup()
        {
            trapezoid = new Trapezoid(1, 1, 2);
        }

        public void TestArea()
        {
            CheckEqual((Scalar)1.5, trapezoid.Area);
        }

        public void TestPerimeter()
        {
            CheckEqual((Scalar)(3 + 2*Math.Sqrt(1 + (.5 * .5))), trapezoid.Perimeter);
        }

        public void TestProjectToNormal()
        {
            Vector2 vector = new Vector2(1, 0);

            CheckEqual(new Interval(-1,1), trapezoid.ProjectToNormal(vector));
        }

        public void TestCenterOfMass()
        {
            CheckEqual(new Vector2(0, 0), trapezoid.CenterOfMass);
        }

        public void TestClone()
        {
            Trapezoid clone = (Trapezoid)trapezoid.Clone();
            CheckEqual(trapezoid.Area, clone.Area);
            CheckEqual(trapezoid.BoundingCircle.Radius, clone.BoundingCircle.Radius);
        }

        public void TestBoundingCircle()
        {
            CheckEqual((Scalar)Math.Sqrt(1 + (trapezoid.OffsetFromMass * trapezoid.OffsetFromMass)), trapezoid.BoundingCircle.Radius);
            trapezoid = new Trapezoid(1, 2, 1);
            CheckEqual((Scalar)Math.Sqrt(1 + (trapezoid.OffsetFromMass * trapezoid.OffsetFromMass)), trapezoid.BoundingCircle.Radius);
        }

        public void TestOffsetFromMass()
        {
            CheckEqual((Scalar)2/3,trapezoid.OffsetFromMass);
        }
    }
}