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

namespace Lodestone.UnitTests
{
    class CircleTests : TestFixture
    {
        Circle circle;
        Vector2 vector;

        public override void TestSetup()
        {
            circle = new Circle(0);
            vector = new Vector2();
        }

        public void testProjectToNormal()
        {
            Interval expected = new Interval(0);
            CheckEqual(expected, circle.ProjectToNormal(vector));
            vector = new Vector2((float)10.9, (float)-8);
            expected = new Interval(0);
            CheckEqual(expected, circle.ProjectToNormal(vector));
            circle = new Circle(10);
            expected = new Interval(-10, 10);
            CheckEqual(expected, circle.ProjectToNormal(vector));
        }

        public void TestCenterOfMass()
        {
            CheckEqual(vector, circle.CenterOfMass);
        }

        public void TestArea()
        {
            CheckEqual((Scalar)0, circle.Radius);
            CheckEqual((Scalar)0, circle.Area);
            circle = new Circle(1);
            CheckEqual((Scalar)1, circle.Radius);
            CheckEqual((Scalar)Math.PI, circle.Area);
        }

        public void TestPerimeter()
        {
            CheckEqual((Scalar)0, circle.Radius);
            CheckEqual((Scalar)0, circle.Perimeter);
            circle = new Circle(1);
            CheckEqual((Scalar)1, circle.Radius);
            CheckEqual((Scalar)(2*Math.PI), circle.Perimeter);
        }

        public void TestBoundingCircle()
        {
            CheckEqual(circle, circle.BoundingCircle);
        }

        
        public void TestClone()
        {
            CheckEqual(circle.Radius, ((Circle)circle.Clone()).Radius);
        }
    }
}