public void EqualsAndHash()
{
Collision collision = new Collision.Builder().SetGeometry(new Geometry(new Sphere(1))).Build();
Collision same = new Collision.Builder().SetGeometry(new Geometry(new Sphere(1))).Build();
Collision diff = new Collision.Builder().SetOrigin(new Origin.Builder().SetXyz(new XyzAttribute(1, 2, 3)).Build())
.SetGeometry(new Geometry(new Sphere(1))).Build();
Assert.IsTrue(collision.Equals(collision));
Assert.IsFalse(collision.Equals(null));
Assert.IsTrue(collision.Equals(same));
Assert.IsTrue(same.Equals(collision));
Assert.IsFalse(collision.Equals(diff));
Assert.AreEqual(collision.GetHashCode(), same.GetHashCode());
Assert.AreNotEqual(collision.GetHashCode(), diff.GetHashCode());
}
