class CurrenciesIdentificatorTest(unittest.TestCase):
def setUp(self):
self.identificator = CurrencySymbolCodeIdentificator()
def test(self):
self.existingSymbol("$", "USD")
self.existingSymbol("£", "GBP")
self.existingSymbol("CA$", "CAD")
def existingSymbol(self, symbol, code):
self.assertEqual(code, self.identificator.translateToCode(symbol))
class CurrenciesIdentificatorTest(unittest.TestCase):
def setUp(self):
self.identificator = CurrencySymbolCodeIdentificator()
def test(self):
self.existingSymbol("$", "USD")
self.existingSymbol("£", "GBP")
self.existingSymbol("CA$", "CAD")
def existingSymbol(self, symbol, code):
self.assertEqual(code, self.identificator.translateToCode(symbol))
def __init__(self, useCache=True, showDiagnosticData=False):
self.useCache = useCache
self.showDiagnosticData = showDiagnosticData
self.availableCurrencies = getAvailableCurrencies()
self.symbolTranslator = CurrencySymbolCodeIdentificator()
class CurrencyConverter:
def __init__(self, useCache=True, showDiagnosticData=False):
self.useCache = useCache
self.showDiagnosticData = showDiagnosticData
self.availableCurrencies = getAvailableCurrencies()
self.symbolTranslator = CurrencySymbolCodeIdentificator()
def convertIntoJson(self, inputCurrency, outputCurrencies, value):
startTime = time.time()
inputCurrency = self._translateInputCurrencyIntoValidCode(
inputCurrency)
outputCurrencies = self._translateOutputCurrenciesIntoValidCode(
outputCurrencies)
rates, cachedData = self._getRates(inputCurrency, outputCurrencies)
executionTime = time.time() - startTime
diagnostic = self._createDiagnosticData(cachedData, executionTime)
jsonResult = self._createJsonFromRates(inputCurrency, rates, value,
diagnostic)
return jsonResult
def _getRates(self, inputCurrency, outputCurrencies):
rates = None
if self.useCache:
cachedData = True
rates = self._tryGetRatesFromCache(inputCurrency, outputCurrencies)
if rates == None:
cachedData = False
rates = self._getExchangeRatesFromWebService(
inputCurrency, outputCurrencies)
return rates, cachedData
def _getExchangeRatesFromWebService(self, inputCurrency, outputCurrencies):
rates = getExchangeRatesFromWebService(inputCurrency, outputCurrencies)
if self.useCache:
writeRatesIntoCache(inputCurrency, rates)
return rates
def _createJsonFromRates(self, inputCurrency, rates, value,
diagnosticData):
result = {}
if diagnosticData != None:
result["diagnostic"] = diagnosticData
result["input"] = {"amount": value, "currency": inputCurrency}
result["output"] = {}
for rate, converted in self._convertEach(rates, value):
result["output"][rate.outputCurrency] = converted
return result
def _createDiagnosticData(self, cachedData, executionTime):
if self.showDiagnosticData:
return {"cachedData": cachedData, "executionTime": executionTime}
return None
def _convertEach(self, rates, value):
for rate in rates:
yield rate, rate.convert(value)
def _tryGetRatesFromCache(self, inputCurrency, outputCurrencies):
try:
rates = tryGetRatesFromCache(inputCurrency, outputCurrencies)
return rates
except NotInCacheError as e:
return None
def _translateOutputCurrenciesIntoValidCode(self, currency):
if currency != None:
currency = [self._processCurrencyInput(currency)]
else:
currency = self.availableCurrencies
return currency
def _translateInputCurrencyIntoValidCode(self, currency):
return self._processCurrencyInput(currency)
def _processCurrencyInput(self, currencyInput):
if currencyInput in self.availableCurrencies:
return currencyInput
currencyCode = self.symbolTranslator.translateToCode(currencyInput)
if currencyCode == None:
raise InvalidCurrency(currencyInput)
return currencyCode
def setUp(self):
self.identificator = CurrencySymbolCodeIdentificator()
def __init__(self, useCache = True, showDiagnosticData = False):
self.useCache = useCache
self.showDiagnosticData = showDiagnosticData
self.availableCurrencies = getAvailableCurrencies()
self.symbolTranslator = CurrencySymbolCodeIdentificator()
class CurrencyConverter:
def __init__(self, useCache = True, showDiagnosticData = False):
self.useCache = useCache
self.showDiagnosticData = showDiagnosticData
self.availableCurrencies = getAvailableCurrencies()
self.symbolTranslator = CurrencySymbolCodeIdentificator()
def convertIntoJson(self, inputCurrency, outputCurrencies, value):
startTime = time.time()
inputCurrency = self._translateInputCurrencyIntoValidCode(inputCurrency)
outputCurrencies = self._translateOutputCurrenciesIntoValidCode(outputCurrencies)
rates, cachedData = self._getRates(inputCurrency, outputCurrencies)
executionTime = time.time() - startTime
diagnostic = self._createDiagnosticData(cachedData, executionTime)
jsonResult = self._createJsonFromRates(inputCurrency, rates, value, diagnostic)
return jsonResult
def _getRates(self, inputCurrency, outputCurrencies):
rates = None
if self.useCache:
cachedData = True
rates = self._tryGetRatesFromCache(inputCurrency, outputCurrencies)
if rates == None:
cachedData = False
rates = self._getExchangeRatesFromWebService(inputCurrency, outputCurrencies)
return rates, cachedData
def _getExchangeRatesFromWebService(self, inputCurrency, outputCurrencies):
rates = getExchangeRatesFromWebService(inputCurrency, outputCurrencies)
if self.useCache:
writeRatesIntoCache(inputCurrency, rates)
return rates
def _createJsonFromRates(self, inputCurrency, rates, value, diagnosticData):
result = {}
if diagnosticData != None:
result["diagnostic"] = diagnosticData
result["input"] = {"amount": value, "currency": inputCurrency}
result["output"] = {}
for rate, converted in self._convertEach(rates, value):
result["output"][rate.outputCurrency] = converted
return result
def _createDiagnosticData(self, cachedData, executionTime):
if self.showDiagnosticData:
return {
"cachedData" : cachedData,
"executionTime" : executionTime
}
return None
def _convertEach(self, rates, value):
for rate in rates:
yield rate, rate.convert(value)
def _tryGetRatesFromCache(self, inputCurrency, outputCurrencies):
try:
rates = tryGetRatesFromCache(inputCurrency, outputCurrencies)
return rates
except NotInCacheError as e:
return None
def _translateOutputCurrenciesIntoValidCode(self, currency):
if currency != None:
currency = [self._processCurrencyInput(currency)]
else:
currency = self.availableCurrencies
return currency
def _translateInputCurrencyIntoValidCode(self, currency):
return self._processCurrencyInput(currency)
def _processCurrencyInput(self, currencyInput):
if currencyInput in self.availableCurrencies:
return currencyInput
currencyCode = self.symbolTranslator.translateToCode(currencyInput)
if currencyCode == None:
raise InvalidCurrency(currencyInput)
return currencyCode
