public function testIs()
{
$directive1 = new Directive();
$directive1->parse('field1:value1');
$directive2 = new Directive();
$directive2->parse('field2:value2');
$this->assertTrue($directive1->is('field1'));
$this->assertTrue($directive2->is('field2'));
$this->assertFalse($directive1->is('field2'));
$this->assertFalse($directive2->is('field1'));
}
