function testCSS()
{
$p = new Page();
$this->assertEmpty($p->renderCSS(), 'Стили не заданы');
$p->addCSS('test.css')->addCSS('print.css', 'print')->addCSS('ie.css', null, 'IE gt 7');
$exp = '<link href="test.css" media="all" rel="stylesheet" type="text/css" />' . "\n" . '<link href="print.css" media="print" rel="stylesheet" type="text/css" />' . "\n" . '<!--[if IE gt 7]><link href="ie.css" media="all" rel="stylesheet" type="text/css" /><![endif]-->' . "\n";
$this->assertEquals($exp, $p->renderCSS(), 'Сформированный HTML');
$p->clearCSS();
$this->assertEmpty($p->renderCSS(), 'Стили удалены');
}