Braintree\Configuration::assertGlobalHasAccessTokenOrKeys PHP 메소드

    public static function assertGlobalHasAccessTokenOrKeys()
    {
        self::$global->assertHasAccessTokenOrKeys();
    }

 /**
  * @expectedException Braintree\Exception\Configuration
  * @expectedExceptionMessage Configuration::publicKey needs to be set
  */
 public function testAssertGlobalHasAccessTokenOrKeysWithoutPublicKey()
 {
     Braintree\Configuration::environment('development');
     Braintree\Configuration::merchantId('integration_merchant_id');
     Braintree\Configuration::publicKey('');
     Braintree\Configuration::privateKey('integration_private_key');
     Braintree\Configuration::assertGlobalHasAccessTokenOrKeys();
 }