public function testCanNotSendMessageWhenHasNotPermission()
 {
     $recipient = ParticipantMockBuilder::createParticipant($this, 2);
     $this->authorizer->expects($this->once())->method('canSendMessageTo')->with($recipient)->will($this->returnValue(false));
     $this->assertFalse($this->extension->canSendMessage($recipient));
 }