public function testSetGetFilesystem()
{
self::assertInstanceOf('\\BrowscapPHP\\Helper\\Filesystem', $this->object->getFilesystem());
/** @var \BrowscapPHP\Helper\Filesystem $file */
$file = $this->getMockBuilder(\BrowscapPHP\Helper\Filesystem::class)->disableOriginalConstructor()->getMock();
self::assertSame($this->object, $this->object->setFilesystem($file));
self::assertSame($file, $this->object->getFilesystem());
}