public function testThreshold()
 {
     $this->fixture->setThreshold(DocBlox_Core_Log::ALERT);
     $this->assertEquals(DocBlox_Core_Log::ALERT, $this->fixture->getThreshold());
     $this->fixture->setThreshold('crit');
     $this->assertEquals(DocBlox_Core_Log::CRIT, $this->fixture->getThreshold());
     $this->setExpectedException('InvalidArgumentException');
     $this->fixture->setThreshold('crit2');
 }