public function testIs()
{
$this->assertTrue(Html::is('foo <b>bar</b>'));
$this->assertTrue(Html::is('<a href="http://jyxo.cz">boo</a>'));
$this->assertFalse(Html::is('foo bar'));
$this->assertFalse(Html::is('one < two'));
$this->assertFalse(Html::is('foo <br<>'));
$this->assertFalse(Html::is('<http://blog.cz/>'));
}