UserAgentParser\Provider\Zsxsoft::getParser PHP 메소드

    public function getParser()
    {
        if ($this->parser !== null) {
            return $this->parser;
        }
        $this->parser = new UserAgent();
        return $this->parser;
    }

 public function testParser()
 {
     $provider = new Zsxsoft();
     $this->assertInstanceOf('UserAgent', $provider->getParser());
     $parser = $this->getParser();
     $provider = new Zsxsoft($parser);
     $this->assertSame($parser, $provider->getParser());
 }