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);
}