Horde_Imap_Client_Data_Capability_Imap::isEnabled PHP Метод

    public function isEnabled($capability = null)
    {
        return is_null($capability) ? $this->_enabled : in_array(Horde_String::upper($capability), $this->_enabled);
    }

 public function testEnable()
 {
     $c = new Horde_Imap_Client_Data_Capability_Imap();
     $c->enable('FOO');
     $this->assertTrue($c->isEnabled('Foo'));
     $c->enable('BAR=BAZ');
     $this->assertTrue($c->isEnabled('bar=baz'));
     $c->enable('FOO', false);
     $this->assertFalse($c->isEnabled('foo'));
 }