phpbb_functional_test_case::assert_filter PHP Method

    public function assert_filter($crawler, $expr, $msg = null)
    {
        $nodes = $crawler->filter($expr);
        if ($msg) {
            $msg .= "\n";
        } else {
            $msg = '';
        }
        $msg .= "`{$expr}` not found in DOM.";
        $this->assertGreaterThan(0, count($nodes), $msg);
        return $nodes;
    }