Payum\Paypal\Masspay\Nvp\Tests\ApiTest::shouldAddVersionOnMasspayCall PHP Method

    public function shouldAddVersionOnMasspayCall()
    {
        $api = new Api(array('username' => 'a_username', 'password' => 'a_password', 'signature' => 'a_signature', 'sandbox' => true), $this->createSuccessHttpClientStub(), $this->createHttpMessageFactory());
        $result = $api->massPay([]);
        $this->assertArrayHasKey('VERSION', $result);
        $this->assertEquals(Api::VERSION, $result['VERSION']);
    }