public function testOffsetMethods()
{
$data = array('foo' => 'bar');
$collection = new Collection($data);
$this->assertTrue($collection->offsetExists('foo'));
$this->assertEquals('bar', $collection->offsetGet('foo'));
$collection->offsetSet(NULL, 'not bar');
$collection->next();
$this->assertEquals('not bar', $collection->current());
$collection->offsetSet('lorem', 'ipsum');
$this->assertEquals('ipsum', $collection->offsetGet('lorem'));
$collection->offsetUnset('foo');
$this->assertFalse($collection->offsetExists('foo'));
}
