/**
  * @covers Robo47_Filter_HtmlPurifier::setPurifier
  */
 public function testSetPurifierUsesDefaultPurifier()
 {
     $purifier = $this->getPurifier();
     $purifier2 = $this->getPurifier();
     Robo47_Filter_HtmlPurifier::setDefaultPurifier($purifier);
     $filter = new Robo47_Filter_HtmlPurifier();
     $this->assertSame($purifier, $filter->getPurifier(), 'Constructor did not set purifier to defaultPurifier');
     $filter->setPurifier($purifier2);
     $this->assertSame($purifier2, $filter->getPurifier(), 'setPurifier did not set purifier');
     $filter->setPurifier();
     $this->assertSame($purifier, $filter->getPurifier(), 'setPurifier() did not set purifier to defaultPurifier');
 }