def currency_converter():
currency_from_id = request.args.get('from', 'USD')
currency_to_id = request.args.get('to', 'BRL')
amount = request.args.get('amount', 1, type=float)
if amount < 0:
amount = amount * -1
currency_from = Currencies.get(currency_from_id)
currency_to = Currencies.get(currency_to_id)
if not currency_from or not currency_to:
response = {}
status = 404
else:
value = round(amount / currency_from.rate * currency_to.rate, 2)
response = {
'from': currency_from_id,
'to': currency_to_id,
'amount': amount,
'value': value
}
status = 200
return Response(json.dumps(response),
status=status,
mimetype='application/json')
def test_create_should_save_and_return_new_currency(self):
created, currency = Currencies.create('EUR')
redis_currency = Redis.hget('currencies', 'EUR')
self.assertTrue(created)
self.assertEqual(currency.currency_id, 'EUR')
self.assertEqual(currency.rate, 1.00)
self.assertTrue(redis_currency)
def test_create_should_return_none_when_already_exists(self):
created, currency = Currencies.create('USD')
self.assertFalse(created)
self.assertEqual(currency.currency_id, 'USD')
self.assertEqual(currency.rate, 1.00)
def test_get_should_return_none_when_not_exists_rate(self):
Redis.hset('currencies', 'INVALID', 1)
currency = Currencies.get('INVALID')
self.assertIsNone(currency)
def test_get_should_return_none_when_not_exists_currency(self):
currency = Currencies.get('EUR')
self.assertIsNone(currency)
def test_get_should_return_selected_currency(self):
currency = Currencies.get('USD')
self.assertEqual(currency.currency_id, 'USD')
self.assertEqual(currency.rate, 1.00)
def test_all_should_return_all_currencies(self):
currencies = Currencies.all()
self.assertEqual(len(currencies), 2)
self.assertEqual(currencies[0].currency_id, 'USD')
self.assertEqual(currencies[0].rate, 1.00)