public function testShouldForwardErrorStringToDataFormat()
 {
     $result = new \Exception('Some error string');
     $errorString = 'SomeErrorString';
     $this->dataFormat->expects($this->once())->method('unserialize')->with($this->equalTo($errorString))->will($this->returnValue($result));
     $resultData = $this->object->unserializeError('some method', $errorString);
     $this->assertEquals($result, $resultData);
 }