AdWordsUser::GetUserAgent PHP Method

    public function GetUserAgent()
    {
        return $this->userAgent;
    }

 /**
  * @covers AdsUser::GetClientLibraryUserAgent
  */
 public function testGetClientLibraryUserAgentReturnsCorrectlyFormattedUserAgent()
 {
     $USER_AGENT = 'AdWordsApiPhpClient-test';
     $LIB_NAME = 'AwApi-PHP';
     $COMMON_NAME = 'Common-PHP';
     $VERSION_REGEX = '\\d{1,2}\\.\\d{1,2}\\.\\d{1,2}';
     $user = new AdWordsUser($this->authIniFilePath, 'devToken', $USER_AGENT, null, null, $this->mockOAuth2Credential);
     // Example: "AdWordsApiPhpClient-test (AwApi-PHP/4.1.1, Common-PHP/5.0.0,
     // PHP/5.4.8)"
     $search = sprintf('/^%s \\(%s\\/%s, %s\\/%s, PHP\\/%s\\)$/', preg_quote($user->GetUserAgent()), preg_quote($LIB_NAME), $VERSION_REGEX, preg_quote($COMMON_NAME), $VERSION_REGEX, preg_quote(PHP_VERSION));
     $this->assertRegExp($search, $user->GetClientLibraryUserAgent());
 }