public function testLangAlternates()
{
$page = new SeoPage();
$page->setLangAlternates(array('http://example.com/' => 'x-default'));
$page->addLangAlternate('http://example.com/en-us', 'en-us');
$expected = array('http://example.com/' => 'x-default', 'http://example.com/en-us' => 'en-us');
$this->assertEquals($expected, $page->getLangAlternates());
$this->assertTrue($page->hasLangAlternate('http://example.com/'));
$page->removeLangAlternate('http://example.com/');
$this->assertFalse($page->hasLangAlternate('http://example.com/'));
}