public void FixedArrayFromEntityWorks()
{
var entityInt = m_Manager.CreateEntity(ComponentType.FixedArray(typeof(int), 3));
m_Manager.GetFixedArray <int>(entityInt).CopyFrom(new int[] { 1, 2, 3 });
var intLookup = EmptySystem.GetFixedArrayFromEntity <int>();
Assert.IsTrue(intLookup.Exists(entityInt));
Assert.IsFalse(intLookup.Exists(new Entity()));
Assert.AreEqual(2, intLookup[entityInt][1]);
}