public function testUpdateStream()
{
$container = $this->getContainerMock();
$dataObject = $this->getDataObjectMock('filename.ext');
$dataObject->shouldReceive('setContent');
$dataObject->shouldReceive('setEtag');
$dataObject->shouldReceive('update')->andReturn(Mockery::self());
$container->shouldReceive('getObject')->andReturn($dataObject);
$adapter = new Rackspace($container);
$resource = tmpfile();
$this->assertInternalType('array', $adapter->updateStream('filename.ext', $resource));
}