$xpath = Parser::cssToXpath('h1.foo');
This component is a port of the Python lxml library,
which is copyright Infrae and distributed under the BSD license.
public function testParseExceptions()
{
$parser = new Parser();
try {
$parser->parse('h1:');
$this->fail('->parse() throws an Exception if the css selector is not valid');
} catch (\Exception $e) {
$this->assertInstanceOf('\\Symfony\\Component\\CssSelector\\SyntaxError', $e, '->parse() throws an Exception if the css selector is not valid');
$this->assertEquals("Expected symbol, got '' at h1: -> ", $e->getMessage(), '->parse() throws an Exception if the css selector is not valid');
}
}
/**
* Filters the list of nodes with a CSS selector.
*
* This method only works if you have installed the CssSelector Symfony Component.
*
* @param string $selector A CSS selector
*
* @return Crawler A new instance of Crawler with the filtered list of nodes
*
* @throws \RuntimeException if the CssSelector Component is not available
*/
public function filter($selector)
{
if (!class_exists('Symfony\\Component\\CssSelector\\Parser')) {
// @codeCoverageIgnoreStart
throw new \RuntimeException('Unable to filter with a CSS selector as the Symfony CssSelector is not installed (you can use filterXPath instead).');
// @codeCoverageIgnoreEnd
}
return $this->filterXPath(CssParser::cssToXpath($selector));
}