/**
* gets a varien_object mock with mocked getData
* @param $returnValue for getData method
* @return PHPUnit_Framework_MockObject_MockObject
*/
private function getObjectMockGetData($returnValue)
{
$mock = $this->testCase->getMock('Varien_Object', array('getData'));
$mock->expects($this->testCase->once())->method('getData')->will($this->testCase->returnValue($returnValue));
return $mock;
}