def test_get_balance(self, access_token):
        client = Client(access_token)

        balance = client.get_balance()
        self.assertIsInstance(balance.btc.balance, float)
        self.assertIsInstance(balance.krw.balance, float)
        self.assertIsInstance(balance.btg.balance, float)
    def test_get_balance_with_mock(self, mock_request):
        _ = mock_request

        client = Client("access_token")

        balance = client.get_balance()
        self.assertIsInstance(balance.btc.balance, float)
        self.assertIsInstance(balance.krw.balance, float)
        self.assertIsInstance(balance.btg.balance, float)