samdark\sitemap\tests\SitemapTest::testFrequencyValidation PHP Method

    public function testFrequencyValidation()
    {
        $this->setExpectedException('InvalidArgumentException');
        $fileName = __DIR__ . '/sitemap.xml';
        $sitemap = new Sitemap($fileName);
        $sitemap->addItem('http://example.com/mylink1');
        $sitemap->addItem('http://example.com/mylink2', time(), 'invalid');
        unlink($fileName);
    }