[TYPO3-dev] Problem Mocking t3lib

[Federico Bernardin]

HI,
I try to mocking with tx_phpunit the class t3lib_mail_Message to verify that a specified method will be executed.
But I have the error below:
Fatal error: Call to a member function defineOrdering() on a non-object in xxxxxxxxxxxxxxx/typo3/contrib/swiftmailer/classes/Swift/Mime/SimpleMessage.php on line 38

I suppose some initial configurations are not satisfied.

Can you help me.

Thanks
Federico