public void TestGetUniqueEntity_TryToGetUnexistingEntity_CreatesNewOneAndReturnsIt()
{
// Precondition: There is no entities with TUniqueComponent in the world
Assert.IsTrue(mWorldContext.GetEntitiesWithAny(typeof(TUniqueComponent)).Count == 0);
IEntity entity = mWorldContext.GetUniqueEntity <TUniqueComponent>();
Assert.IsNotNull(entity);
}