public function testAddCollection()
{
$testTwoElementArray = array($this->testEntities[2], $this->testEntities[3]);
$coll2 = ConcreteCollection::fromArray($testTwoElementArray);
$this->coll->addCollection($coll2);
$this->assertSame($this->coll->count(), 3);
$this->assertEquals($this->coll->getObjects()[0], $this->testEntities[1]);
$this->assertEquals($this->coll->getObjects()[1], $this->testEntities[2]);
$this->assertEquals($this->coll->getObjects()[2], $this->testEntities[3]);
$this->coll->addCollection($coll2, 0);
$this->assertSame($this->coll->count(), 5);
$this->assertEquals($this->coll->getObjects()[0], $this->testEntities[2]);
$this->assertEquals($this->coll->getObjects()[1], $this->testEntities[3]);
$this->assertEquals($this->coll->getObjects()[2], $this->testEntities[1]);
$this->assertEquals($this->coll->getObjects()[3], $this->testEntities[2]);
$this->assertEquals($this->coll->getObjects()[4], $this->testEntities[3]);
$oneElementArray = array($this->testEntities[5]);
$coll3 = ConcreteCollection::fromArray($oneElementArray);
$this->coll->addCollection($coll3, -1);
$this->assertSame($this->coll->count(), 6);
$this->assertEquals($this->coll->getObjects()[0], $this->testEntities[2]);
$this->assertEquals($this->coll->getObjects()[1], $this->testEntities[3]);
$this->assertEquals($this->coll->getObjects()[2], $this->testEntities[1]);
$this->assertEquals($this->coll->getObjects()[3], $this->testEntities[2]);
$this->assertEquals($this->coll->getObjects()[4], $this->testEntities[5]);
$this->assertEquals($this->coll->getObjects()[5], $this->testEntities[3]);
}
