public function testDeduping()
{
// test adding then removing
$collection = new Collection();
$collection->setChangeTracking();
$collection->add($this->entity1);
$collection->add($this->entity2);
$collection->remove($this->entity1);
$added = $collection->getAddedEntities();
$this->assertCount(1, $added, "Check the added entity array only has one entry");
$this->assertCount(0, $collection->getRemovedEntities(), "Check the removed entity array has no entries");
$this->assertSame($this->entity2, array_pop($added));
// test removing then adding
$collection = new Collection();
$collection->add($this->entity1);
$collection->add($this->entity2);
$collection->setChangeTracking();
$collection->remove($this->entity1);
$collection->remove($this->entity2);
$collection->add($this->entity2);
$collection->add($this->entity3);
$added = $collection->getAddedEntities();
$removed = $collection->getRemovedEntities();
$this->assertCount(1, $added, "Check the added entity array only has one entry");
$this->assertCount(1, $removed, "Check the removed entity array has no entries");
$this->assertSame($this->entity3, array_pop($added));
$this->assertSame($this->entity1, array_pop($removed));
}
