/**
*
*/
public function testStack()
{
$collection = new Collection($this->collection);
$collection->push('test');
$this->assertEquals($collection->all(), ['foo' => 'bar', '123' => 456, 'level1' => ['level2' => ['level3' => 'value']], 124 => 'test']);
$this->assertEquals($collection->pull('level1'), ['level2' => ['level3' => 'value']]);
$this->assertEquals($collection->all(), ['foo' => 'bar', '123' => 456, 124 => 'test']);
$collection->throne('king', 'role');
$this->assertEquals($collection->all(), ['role' => 'king', 'foo' => 'bar', '123' => 456, 124 => 'test']);
$this->assertEquals($collection->shift(), 'king');
$pop = $collection->pop();
$this->assertEquals($collection->all(), ['foo' => 'bar', '123' => 456]);
$this->assertEquals($pop, 'test');
$collection->airy();
$this->assertEquals($collection->all(), ['foo' => 'bar', '0' => 456]);
}
