public function testChainedContainers()
{
$pimpleGrandParent = new PimpleInterop();
$pimpleGrandParent['hello'] = 'world';
$pimpleParent = new PimpleInterop($pimpleGrandParent);
$pimple = new PimpleInterop($pimpleParent);
$this->assertEquals('world', $pimple->get('hello'));
$this->assertTrue($pimple->has('hello'));
$this->assertFalse($pimple->has('world'));
}
