FastFeed\Tests\Parser\AtomParserFirstElementTest::testId PHP Method

    public function testId($fileName)
    {
        $content = $this->getContent($fileName);
        $item = $this->getItem($content);
        $expected = $this->getFirstValueFromXpath($content, "*/ns:id[1]");
        $this->assertEquals($expected, $item->getId(), 'Fail asserting that first element of ' . $fileName . ' has id "' . $expected . '"');
    }