obj = new HTMLPurifier_AttrTransform_BdoDir(); } function test() { $this->assertResult( array(), array('dir' => 'ltr') ); // leave existing dir alone $this->assertResult( array('dir' => 'rtl') ); // use a different default $this->assertResult( array(), array('dir' => 'rtl'), array('Attr.DefaultTextDir' => 'rtl') ); } }