def test_instance_should_have_save_method(self):
currency = Currency('BRL', 2.0)
currency.save()
rate = Redis.hget('currencies', 'BRL')
self.assertTrue(rate)
def test_count_query_on_get_currencies_serializer(self):
for i in range(1, 10):
currency = Currency.objects.create(name=f'currency{i}')
Scraper.objects.create(currency=currency, frequency=i)
currency.prices.create(value=i)
with self.assertNumQueries(11):
Currency.get_currencies_serializer()
def test_delete_currency(self):
currency = Currency.objects.create(name='Bitcoin')
data = {
'id': currency.pk,
}
Currency.delete_currency(data)
self.assertEqual(Currency.objects.count(), 0)
def test_delete_currency_invalid_id(self):
self.assertEqual(
Currency.objects.count(),
0
)
data = {
'id': 1,
}
with self.assertRaises(Currency.DoesNotExist):
Currency.delete_currency(data)
def test_delete_currency_invalid_data(self):
self.assertEqual(
Currency.objects.count(),
0
)
data = {
'invalid-key': 1,
}
with self.assertRaises(ValidationError):
Currency.delete_currency(data)
def test_create_currency_from_coinmarketcap_invalid_currency(self):
data = {
'currency': 'invalid-currency-foo',
'frequency': 20,
}
with self.assertRaises(HTTPError):
Currency.create_currency_from_coinmarketcap(data)
self.assertEqual(
Currency.objects.count(),
0
)
def test_update_frequency(self):
currency = Currency.objects.create(name='Bitcoin')
Scraper.objects.create(currency=currency, frequency=60)
data = {
'id': currency.pk,
'frequency': 20,
}
Currency.update_frequency(data)
currency.refresh_from_db()
self.assertEqual(currency.frequency, data['frequency'])
def test_update_frequency_invalid_id(self):
self.assertEqual(
Currency.objects.count(),
0
)
data = {
'id': 1,
'frequency': 20,
}
with self.assertRaises(Currency.DoesNotExist):
Currency.update_frequency(data)
def test_update_frequency_invalid_data(self):
self.assertEqual(
Currency.objects.count(),
0
)
data = {
'id': 1,
'invalid-key': 20,
}
with self.assertRaises(ValidationError):
Currency.update_frequency(data)
def test_create_currency_from_coinmarketcap_invalid_data(self):
data = {
'foo': 'Bitcoin',
'bar': 20,
}
with self.assertRaises(ValidationError):
Currency.create_currency_from_coinmarketcap(data)
self.assertEqual(
Currency.objects.count(),
0
)
def post(self, *args, **kwargs):
try:
data = self.get_data()
return JsonResponse(
Currency.create_currency_from_coinmarketcap(data=data))
except Exception as e:
return self.get_bad_request(e)
def test_create_currency_from_coinmarketcap(self):
self.assertEqual(
Currency.objects.count(),
0
)
data = {
'currency': 'Bitcoin',
'frequency': 20,
}
data = Currency.create_currency_from_coinmarketcap(data)
self.assertEqual(
Currency.objects.count(),
1
)
currency = Currency.objects.get()
self.assertEqual(currency.name, data['currency'])
self.assertEqual(currency.frequency, data['frequency'])
self.assertEqual(currency.prices.count(), 1)
self.assertEqual(
sorted(data.keys()),
sorted(currency.get_currency_retrieve_serializer().keys())
)
def currencies(request):
if request.method == "PUT":
# Update database with latest currencies
try:
rates = requests.get("https://api.exchangeratesapi.io/latest?base=ZAR").json()['rates']
print(rates)
Currency.objects.all().delete()
for name, value in rates.items():
print(name)
print(value)
Currency(name=name, value=value).save()
except requests.exceptions.RequestException as e:
# Show error if failed to connect to api
return JsonResponse({"code": 200, "message": "Connection Error, Currencies May Not Be The Latest"})
return JsonResponse({"code": 200, "message": "Updated Currencies"})
if request.method == "GET":
currencies = Currency.objects.all()
serializer = CurrencySerializer(currencies, many=True)
return JsonResponse(dict(currencies=list(serializer.data)))
if request.method == "POST":
try:
value1 = Currency.objects.get(name=request.GET['currency'])
print(value1)
except Currency.DoesNotExist:
return JsonResponse({"code": 404, "message": "Currency Does Not Exist"})
value = CurrencySerializer(value1).data['value']
print(value)
return JsonResponse({"result" : float(request.GET['value'])/value})
def test_create_currency_from_coinmarketcap_not_repeat_currency(self):
data = {
'currency': 'Bitcoin',
'frequency': 20,
}
Currency.create_currency_from_coinmarketcap(data)
currency = Currency.objects.first()
Currency.create_currency_from_coinmarketcap(data)
currency2 = Currency.objects.last()
self.assertEqual(
Currency.objects.count(),
1
)
self.assertEqual(currency, currency2)
self.assertEqual(currency.value, currency2.value)
def put(self, request):
# I get the content from the body request and convert it into a dictionary
body_unicode = request.body.decode('utf-8')
body = json.loads(body_unicode)
try:
# Define what the prototype is for a user and grab data from the dictionary
newCurrency = Currency(
name=body['name'],
symbol=body['symbol'],
rank=body['rank'],
price_usd=body['price_usd'],
volume_24h_usd=body['volume_24h_usd'],
market_cap_usd=body['market_cap_usd'],
available_supply=body['available_supply'],
total_supply=body['total_supply'],
percent_change_1h=body['percent_change_1h'],
percent_change_24h=body['percent_change_24h'],
percent_change_7d=body['percent_change_7d'],
last_updated=body['last_updated'],
ticker_history=body['ticker_history'])
# Save the new coin
newCurrency.save()
except Exception as e:
logger.error('Something went wrong!')
# Custom error message to return if coin could not be created
raise ObjectNotFound("Could not create the coin {}".format(e))
# Serialize the new coin data
serializer = CurrencySerializer(newCurrency, many=False)
# Return the coin
return Response(serializer.data)
def build_currency_rates(queryset):
rates = get_rates_from_openexchange()
now = int(datetime.now().timestamp())
# Add base (USD) api
usd = Currency(base='USD', created_timestamp=now)
usd.save()
for code, rate_to_usd in rates.items():
rate_to_usd = Decimal(rate_to_usd)
# Add corresponding rates for USD
Rate(base=usd, code=code, rate=rate_to_usd).save()
# Add each of allowed currencies and populate its rates
curr = Currency(base=code, created_timestamp=now)
curr.save()
Rate(base=curr, code='USD', rate=Decimal(1) / rate_to_usd).save()
for curr_code, rate_to_curr in (_ for _ in rates.items()
if _[0] != code):
Rate(base=curr,
code=curr_code,
rate=Decimal(1) / rate_to_usd * Decimal(rate_to_curr)).save()
return queryset.all()
def delete(self, *args, **kwargs):
try:
data = self.get_data()
return JsonResponse(Currency.delete_currency(data=data))
except Exception as e:
return self.get_bad_request(e)
def test_instance_should_be_renderized_in_dict(self):
currency = Currency('BRL', 2.0)
currency_json = currency.to_dict()
self.assertEqual(currency_json, {'id': 'BRL', 'rate': 2.0})
def test_instance_model_should_create_new_object(self):
currency = Currency('BRL', 2.0)
self.assertIsInstance(currency, Currency)
self.assertEqual(currency.currency_id, 'BRL')
self.assertEqual(currency.rate, 2.0)
def get(self, *args, **kwargs):
return JsonResponse(Currency.get_currencies_serializer())