public void produce_6_two_way_currency_pairs_when_3_exchange_rate_lines_with_no_common_tail_or_head_are_read()
{
Tuple <string, string, decimal> exchangeRateLineElements = new Tuple <string, string, decimal>("AUD", "CHF", 0.9661m);
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
exchangeRateLineElements = new Tuple <string, string, decimal>("EUR", "JPY", 1.2053m);
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
exchangeRateLineElements = new Tuple <string, string, decimal>("HUF", "USD", 7.5498m);
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
currencyConversionPaths.ShouldSatisfyAllConditions
(
() => currencyConversionPaths.CurrencyPaths.Count.ShouldBe(6),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("AUD->CHF"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("CHF->AUD"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("EUR->JPY"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("JPY->EUR"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("HUF->USD"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("USD->HUF")
);
}
public void return_the_shortest_path_among_all_paths_for_given_start_and_end_currencies()
{
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths.CurrencyPaths.Add("CHF->EUR->USD->JPY->AUD");
currencyConversionPaths.CurrencyPaths.Add("CHF->EUR->USD");
currencyConversionPaths.CurrencyPaths.Add("CHF->EUR->USD->JPY->BOB->COP->AUD");
currencyConversionPaths.CurrencyPaths.Add("EUR->USD->JPY->BOB->COP->AUD");
currencyConversionPaths.CurrencyPaths.Add("CHF->EUR->BRL->AUD");
currencyConversionPaths.FindShortestPath("CHF", "AUD").First().ShouldBe("CHF->EUR->BRL->AUD");
}
public void return_the_right_rate_among_all_rates_for_given_currency_pair()
{
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths.ExchangeRatePaths.Add("CHF->EUR:0,2522");
currencyConversionPaths.ExchangeRatePaths.Add("EUR->USD:1,3456");
currencyConversionPaths.ExchangeRatePaths.Add("EUR->CHF:2,4656");
currencyConversionPaths.ExchangeRatePaths.Add("EUR->JPY:0,4567");
currencyConversionPaths.ExchangeRatePaths.Add("CHF->AUD:1,3876");
currencyConversionPaths.GetRate("CHF->AUD").First().ShouldBe("1,3876");
}
public void return_the_right_rate_among_all_rates_for_given_currency_pair()
{
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths.ExchangeRatePaths.Add ("CHF->EUR:0,2522");
currencyConversionPaths.ExchangeRatePaths.Add ("EUR->USD:1,3456");
currencyConversionPaths.ExchangeRatePaths.Add ("EUR->CHF:2,4656");
currencyConversionPaths.ExchangeRatePaths.Add ("EUR->JPY:0,4567");
currencyConversionPaths.ExchangeRatePaths.Add ("CHF->AUD:1,3876");
currencyConversionPaths.GetRate("CHF->AUD").First().ShouldBe("1,3876");
}
public void return_the_shortest_path_among_all_paths_for_given_start_and_end_currencies()
{
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths.CurrencyPaths.Add ("CHF->EUR->USD->JPY->AUD");
currencyConversionPaths.CurrencyPaths.Add ("CHF->EUR->USD");
currencyConversionPaths.CurrencyPaths.Add ("CHF->EUR->USD->JPY->BOB->COP->AUD");
currencyConversionPaths.CurrencyPaths.Add ("EUR->USD->JPY->BOB->COP->AUD");
currencyConversionPaths.CurrencyPaths.Add ("CHF->EUR->BRL->AUD");
currencyConversionPaths.FindShortestPath("CHF","AUD").First().ShouldBe("CHF->EUR->BRL->AUD");
}
public static CurrencyConversionPaths ConvertToCurrencyConversionPaths(Tuple<string, string, decimal> lineElements, CurrencyConversionPaths currencyConversionPaths)
{
string newHeadCurrency = lineElements.Item1;
string newTailCurrency = lineElements.Item2;
decimal newExchangeRate = lineElements.Item3;
if ((!currencyConversionPaths.CurrencyPaths.Contains(newHeadCurrency + "->" + newTailCurrency)) && (!currencyConversionPaths.CurrencyPaths.Contains(newHeadCurrency + "->" + newTailCurrency)))
{
List<string> newPaths = new List<string>();
if (currencyConversionPaths.CurrencyPaths.Count > 0)
{
newPaths.AddRange(
from path in currencyConversionPaths.CurrencyPaths
where path.StartsWith(newHeadCurrency)
select newTailCurrency + "->" + path
);
newPaths.AddRange(
from path in currencyConversionPaths.CurrencyPaths
where path.EndsWith(newHeadCurrency)
select path + "->" + newTailCurrency
);
newPaths.AddRange(
from path in currencyConversionPaths.CurrencyPaths
where path.StartsWith(newTailCurrency)
select newHeadCurrency + "->" + path
);
newPaths.AddRange(
from path in currencyConversionPaths.CurrencyPaths
where path.EndsWith(newTailCurrency)
select path + "->" + newHeadCurrency
);
currencyConversionPaths.CurrencyPaths.AddRange(newPaths);
}
currencyConversionPaths.CurrencyPaths.Add(newHeadCurrency + "->" + newTailCurrency);
currencyConversionPaths.ExchangeRatePaths.Add(newHeadCurrency + "->" + newTailCurrency + ":" + newExchangeRate);
currencyConversionPaths.CurrencyPaths.Add(newTailCurrency + "->" + newHeadCurrency);
currencyConversionPaths.ExchangeRatePaths.Add(newTailCurrency + "->" + newHeadCurrency + ":" + decimal.Round(1 / newExchangeRate, 4));
}
return currencyConversionPaths;
}
public void produce_a_two_way_currency_pairs_when_one_exchange_rate_line_is_read()
{
Tuple <string, string, decimal> exchangeRateLineElements = new Tuple <string, string, decimal> ("AUD", "CHF", 0.9661m);
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
currencyConversionPaths.ShouldSatisfyAllConditions
(
() => currencyConversionPaths.CurrencyPaths.First().ShouldBe("AUD->CHF"),
() => currencyConversionPaths.CurrencyPaths.Count.ShouldBe(2),
() => currencyConversionPaths.CurrencyPaths.ElementAt(1).ShouldBe("CHF->AUD")
);
}
public void produce_4_currency_rate_pairs_when_2_different_exchange_rate_lines_are_read()
{
Tuple <string, string, decimal> exchangeRateLineElements = new Tuple <string, string, decimal>("AUD", "CHF", 0.9661m);
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
exchangeRateLineElements = new Tuple <string, string, decimal>("EUR", "CHF", 1.2053m);
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
currencyConversionPaths.ShouldSatisfyAllConditions
(
() => currencyConversionPaths.ExchangeRatePaths.Count.ShouldBe(4),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("AUD->CHF:0,9661"),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("CHF->AUD:1,0351"),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("EUR->CHF:1,2053"),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("CHF->EUR:0,8297")
);
}
public void produce_4_two_way_currency_pairs_when_2_exchange_rate_lines_with_no_common_tail_or_head_are_read()
{
Tuple<string, string, decimal> exchangeRateLineElements = new Tuple<string, string, decimal>("AUD", "CHF", 0.9661m);
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
exchangeRateLineElements = new Tuple<string, string, decimal>("EUR", "JPY", 2.5487m);
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
currencyConversionPaths.ShouldSatisfyAllConditions
(
() => currencyConversionPaths.CurrencyPaths.Count.ShouldBe(4),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("AUD->CHF"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("CHF->AUD"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("EUR->JPY"),
() => currencyConversionPaths.CurrencyPaths.ShouldContain("JPY->EUR")
);
}
public void produce_4_currency_rate_pairs_when_2_different_exchange_rate_lines_are_read()
{
Tuple<string, string, decimal> exchangeRateLineElements = new Tuple<string, string, decimal>("AUD", "CHF", 0.9661m);
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
exchangeRateLineElements = new Tuple<string, string, decimal>("EUR", "CHF", 1.2053m);
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
currencyConversionPaths.ShouldSatisfyAllConditions
(
() => currencyConversionPaths.ExchangeRatePaths.Count.ShouldBe(4),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("AUD->CHF:0,9661"),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("CHF->AUD:1,0351"),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("EUR->CHF:1,2053"),
() => currencyConversionPaths.ExchangeRatePaths.ShouldContain("CHF->EUR:0,8297")
);
}
public static void Main(string[] args)
{
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
decimal convertedAmount = 0;
Console.WriteLine ("Welcome to this brilliant currency converter! ;-)");
Console.WriteLine ("=================================================");
Tuple<string, int, string> firstLineElements = ConsoleParser.ReadFirstLine(Console.ReadLine());
Decimal.TryParse(firstLineElements.Item2.ToString(CultureInfo.InvariantCulture), NumberStyles.Any, CultureInfo.InvariantCulture, out convertedAmount);
if (firstLineElements != null)
{
int nbrExchangeRates = ConsoleParser.ReadSecondLine(Console.ReadLine());
if (nbrExchangeRates > 0)
{
for (int i = 0; i < nbrExchangeRates; i++)
{
Tuple<string, string, decimal> exchangeRateLineElements = ConsoleParser.ReadExchangeRatesLine(Console.ReadLine());
if (exchangeRateLineElements != null)
{
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
}
else
{
Console.WriteLine("Incorrect exchange rate input!");
Console.ReadLine();
return;
}
}
List<string> shortestPath = currencyConversionPaths.FindShortestPath (firstLineElements.Item1, firstLineElements.Item3);
if (shortestPath.Count() > 0)
{
List<string> shortestPathPairs = CurrenciesPathManager.splitPathIntoPairs(shortestPath.First());
var rates =
from pair in shortestPathPairs
let rate = currencyConversionPaths.GetRate (pair)
let pairRate = Decimal.Parse(rate.First(), NumberStyles.AllowDecimalPoint, CultureInfo.CreateSpecificCulture("fr-FR"))
select pairRate;
convertedAmount = rates.Aggregate(convertedAmount, (x, y) => x * y);
Console.WriteLine("" + (int)decimal.Round(convertedAmount, MidpointRounding.AwayFromZero));
}
else
{
Console.WriteLine("No enough rates to convert! :-(");
}
}
else
{
Console.WriteLine("Incorrect number of exchange rates!");
}
}
else
{
Console.WriteLine("Incorrect first line input!");
}
Console.ReadLine();
}
public void produce_a_two_way_currency_pairs_when_one_exchange_rate_line_is_read()
{
Tuple<string, string, decimal> exchangeRateLineElements = new Tuple<string, string, decimal> ("AUD","CHF", 0.9661m);
CurrencyConversionPaths currencyConversionPaths = new CurrencyConversionPaths();
currencyConversionPaths = CurrenciesPathManager.ConvertToCurrencyConversionPaths(exchangeRateLineElements, currencyConversionPaths);
currencyConversionPaths.ShouldSatisfyAllConditions
(
() => currencyConversionPaths.CurrencyPaths.First().ShouldBe("AUD->CHF"),
() => currencyConversionPaths.CurrencyPaths.Count.ShouldBe(2),
() => currencyConversionPaths.CurrencyPaths.ElementAt(1).ShouldBe("CHF->AUD")
);
}
