public function testSetMessage()
 {
     $git = new VersionControl_Git(dirname(__FILE__) . '/fixtures/001_VersionControl_Git');
     $instance = new VersionControl_Git_Object_Commit($git, '4ed54abb8efca38a0c794ca414b1f296279e0d85');
     $instance->setMessage('message');
     $this->assertEquals($instance->getMessage(), 'message');
 }