public function testWriteStream() { $container = $this->getContainerMock(); $dataObject = $this->getDataObjectMock('filename.ext'); $container->shouldReceive('uploadObject')->andReturn($dataObject); $adapter = new Rackspace($container); $config = new Config([]); $stream = tmpfile(); fwrite($stream, 'something'); $this->assertInternalType('array', $adapter->writeStream('filename.ext', $stream, $config)); fclose($stream); }