UserAgentParser\Model\UserAgent::setOperatingSystem PHP Method

    public function setOperatingSystem(OperatingSystem $operatingSystem)
    {
        $this->operatingSystem = $operatingSystem;
    }

 public function testOperatingSystem()
 {
     $ua = new UserAgent();
     $this->assertInstanceOf('UserAgentParser\\Model\\OperatingSystem', $ua->getOperatingSystem());
     $mock = self::createMock('UserAgentParser\\Model\\OperatingSystem');
     $ua->setOperatingSystem($mock);
     $this->assertSame($mock, $ua->getOperatingSystem());
 }