public function testOverwriteWithTraversable()
{
$c = new Collection(array('foo' => 1, 'baz' => 2, 'bar' => 3));
$b = new Collection(array('foo' => 10, 'bar' => 300));
$c->overwriteWith($b->getIterator());
$this->assertEquals(array('foo' => 10, 'baz' => 2, 'bar' => 300), $c->toArray());
}