//using System.Collections.Generic;
//using System.Globalization;
//using Microsoft.Xna.Framework;
//using Xunit;

//namespace MonoGame.Extended.Tests.Primitives
//{
//    
//    public class Ray2Tests
//    {
//        public IEnumerable<TestCaseData> ConstructorTestCases
//        {
//            get
//            {
//                yield return
//                    new TestCaseData(new Point2(), new Vector2()).SetName(
//                        "The degenerate ray has the expected position and direction.");
//                yield return
//                    new TestCaseData(new Point2(5, 5), new Vector2(15, 15)).SetName(
//                        "A non-degenerate ray has the expected position and direction.");
//            }
//        }

//        [Fact]
//        [TestCaseSource(nameof(ConstructorTestCases))]
//        public void Constructor(Point2 position, Vector2 direction)
//        {
//            var ray = new Ray2(position, direction);
//            Assert.Equal(position, ray.Position);
//            Assert.Equal(direction, ray.Direction);
//        }

//        public IEnumerable<TestCaseData> PositionDirectionTestCases
//        {
//            get
//            {
//                yield return
//                    new TestCaseData(new Ray2(), new Point2(), new Vector2()).SetName(
//                        "The degenerate ray has the expected position and direction.");
//                yield return
//                    new TestCaseData(new Ray2(new Point2(5, 5), new Vector2(15, 15)), new Point2(5, 5),
//                            new Vector2(15, 15)).SetName
//                        (
//                            "A non-degenerate ray has the expected position and direction.");
//            }
//        }

//        [Fact]
//        [TestCaseSource(nameof(PositionDirectionTestCases))]
//        public void PositionDirection(Ray2 ray, Point2 expectedPosition, Vector2 expecetedDirection)
//        {
//            Assert.Equal(expectedPosition, ray.Position);
//            Assert.Equal(expecetedDirection, ray.Direction);

//            ray.Position.X = 10;
//            ray.Position.Y = 10;
//            Assert.Equal(new Point2(10, 10), ray.Position);

//            ray.Direction.X = -10.123f;
//            ray.Direction.Y = 10.123f;
//            Assert.Equal(new Vector2(-10.123f, 10.123f), ray.Direction);
//        }

//        public IEnumerable<TestCaseData> IntersectsBoundingRectangleTestCases
//        {
//            get
//            {
//                yield return
//                    new TestCaseData(new Ray2(), new BoundingRectangle(), true, Point2.Zero, Point2.Zero).SetName(
//                        "The degenerate ray intersects the empty bounding box.");
//                yield return
//                    new TestCaseData(new Ray2(new Point2(-75, -75), new Vector2(75, -75)),
//                        new BoundingRectangle(new Point2(), new Size2(50, 50)), false, Point2.NaN, Point2.NaN).SetName(
//                        "A non-degenerate ray that does not cross a non-empty bounding box does not intersect the bounding box.");
//                yield return
//                    new TestCaseData(new Ray2(new Point2(0, 0), new Vector2(25, 0)), new BoundingRectangle(new Point2(), new Size2(50, 50)),
//                        true, new Point2(0, 0), new Point2(50, 0)).SetName(
//                        "A non-degenerate ray starting from inside a non-empty bounding box intersects the bounding box.");
//                yield return
//                    new TestCaseData(new Ray2(new Point2(-100, 0), new Vector2(100, 0)),
//                        new BoundingRectangle(new Point2(), new Size2(50, 50)),
//                        true, new Point2(-50, 0), new Point2(50, 0)).SetName(
//                        "A non-degenerate ray crossing a non-empty bounding box intersects the bounding box.");
//            }
//        }

//        [Fact]
//        [TestCaseSource(nameof(IntersectsBoundingRectangleTestCases))]
//        public void IntersectsBoundingRectangle(Ray2 ray, BoundingRectangle boundingRectangle, bool expectedResult,
//            Point2 firstExpectedIntersectionPoint, Point2 secondExpectedIntersectionPoint)
//        {
//            float rayNearDistance, rayFarDistance;
//            var actualResult = ray.Intersects(boundingRectangle, out rayNearDistance, out rayFarDistance);
//            Assert.Equal(expectedResult, actualResult);

//            if (actualResult)
//            {
//                var firstActualIntersectionPoint = ray.Position + ray.Direction * rayNearDistance;
//                Assert.Equal(firstExpectedIntersectionPoint, firstActualIntersectionPoint);
//                var secondActualIntersectionPoint = ray.Position + ray.Direction * rayFarDistance;
//                Assert.Equal(secondExpectedIntersectionPoint, secondActualIntersectionPoint);
//            }
//            else
//            {
//                Assert.IsTrue(float.IsNaN(rayNearDistance));
//                Assert.IsTrue(float.IsNaN(rayFarDistance));
//            }
//        }

//        public IEnumerable<TestCaseData> EqualityTestCases
//        {
//            get
//            {
//                yield return
//                    new TestCaseData(new Ray2(), new Ray2(), true).SetName("Two degenerate rays are equal.");
//                yield return
//                    new TestCaseData(new Ray2(new Point2(float.MinValue, float.MaxValue),
//                        new Vector2(float.MaxValue, float.MinValue)), new Ray2(new Point2(float.MaxValue, float.MinValue),
//                        new Vector2(float.MaxValue, float.MinValue)), false).SetName(
//                        "Two different non-degenerate rays are not equal.");
//                yield return
//                    new TestCaseData(
//                            new Ray2(new Point2(float.MinValue, float.MaxValue),
//                                new Vector2(float.MinValue, float.MaxValue)), new Ray2(new Point2(float.MinValue, float.MaxValue),
//                                new Vector2(float.MinValue, float.MaxValue)), true)
//                        .SetName(
//                            "Two identical non-degenerate rays are equal.");
//            }
//        }

//        [Fact]
//        [TestCaseSource(nameof(EqualityTestCases))]
//        public void Equality(Ray2 ray1, Ray2 ray2, bool expectedToBeEqual)
//        {
//            Assert.IsTrue(Equals(ray1, ray2) == expectedToBeEqual);
//            Assert.IsTrue(ray1 == ray2 == expectedToBeEqual);
//            Assert.IsFalse(ray1 == ray2 != expectedToBeEqual);
//            Assert.IsTrue(ray1.Equals(ray2) == expectedToBeEqual);

//            if (expectedToBeEqual)
//                Assert.Equal(ray1.GetHashCode(), ray2.GetHashCode());
//        }

//        public IEnumerable<TestCaseData> InequalityTestCases
//        {
//            get
//            {
//                yield return
//                    new TestCaseData(new Ray2(), null, false).SetName("A ray is not equal to a null object.");
//                yield return
//                    new TestCaseData(new Ray2(), new object(), false).SetName(
//                        "A ray is not equal to an instantiated object.");
//            }
//        }

//        [Fact]
//        [TestCaseSource(nameof(InequalityTestCases))]
//        public void Inequality(Ray2 ray, object obj, bool expectedToBeEqual)
//        {
//            Assert.IsTrue(ray.Equals(obj) == expectedToBeEqual);
//        }

//        public IEnumerable<TestCaseData> HashCodeTestCases
//        {
//            get
//            {
//                yield return
//                    new TestCaseData(new Ray2(), new Ray2(), true).SetName(
//                        "Two degenerate rays have the same hash code.");
//                yield return
//                    new TestCaseData(new Ray2(new Point2(50, 50), new Vector2(50, 50)),
//                        new Ray2(new Point2(50, 50), new Vector2(50, 50)), true).SetName(
//                        "Two indentical non-zero points have the same hash code.");
//                yield return
//                    new TestCaseData(new Ray2(new Point2(0, 0), new Vector2(50, 50)),
//                        new Ray2(new Point2(50, 50), new Vector2(50, 50)), false).SetName(
//                        "Two different non-zero points do not have the same hash code.");
//            }
//        }

//        [Fact]
//        [TestCaseSource(nameof(HashCodeTestCases))]
//        public void HashCode(Ray2 ray1, Ray2 ray2, bool expectedThatHashCodesAreEqual)
//        {
//            var hashCode1 = ray1.GetHashCode();
//            var hashCode2 = ray2.GetHashCode();
//            if (expectedThatHashCodesAreEqual)
//                Assert.Equal(hashCode1, hashCode2);
//            else
//                Assert.AreNotEqual(hashCode1, hashCode2);
//        }

//        public IEnumerable<TestCaseData> StringCases
//        {
//            get
//            {
//                yield return
//                    new TestCaseData(new Ray2(),
//                        string.Format(CultureInfo.CurrentCulture, "Position: {0}, Direction: {1}", new Point2(),
//                            new Vector2())).SetName(
//                        "The degenerate ray has the expected string representation using the current culture.");
//                yield return new TestCaseData(new Ray2(new Point2(5.1f, -5.123f), new Vector2(0, 1)),
//                    string.Format(CultureInfo.CurrentCulture, "Position: {0}, Direction: {1}", new Point2(5.1f, -5.123f),
//                        new Vector2(0, 1))).SetName(
//                    "A non-degenerate ray has the expected string representation using the current culture.");
//            }
//        }

//        [Fact]
//        [TestCaseSource(nameof(StringCases))]
//        public void String(Ray2 ray, string expectedString)
//        {
//            var actualString = ray.ToString();
//            Assert.Equal(expectedString, actualString);
//        }
//    }
//}