public function testReleaseDate()
{
$adapter = new Memory();
$cache = new BrowscapCache($adapter);
$this->assertNull($cache->getVersion());
$cache->setItem('browscap.releaseDate', 'Thu, 04 Feb 2016 12:59:23 +0000', false);
$this->assertEquals('Thu, 04 Feb 2016 12:59:23 +0000', $cache->getReleaseDate());
}