public IActionResult Get(RequestFX requestFx)
{
ResponseFX responseFx = currencyConverterService.ConvertCurrency(requestFx);
if (responseFx is null)
{
return(this.BadRequest());
}
return(this.Ok(responseFx));
}
public void WhenCallingCurrencyConverterWithInvalidParametersReturnNull(string amount, string source, string target)
{
var request = new RequestFX()
{
Amount = amount,
SourceCurrency = source,
TargetCurrency = target
};
var result = this.currencyConverter.ConvertCurrency(request);
Assert.IsNull(result);
}
public void WhenCallingCurrencyConverterWithUnfoundTargetCurrencyReturnNull()
{
var request = new RequestFX()
{
Amount = "1.00",
SourceCurrency = "GBP",
TargetCurrency = "USD"
};
this.exchangeRates.Setup(e => e.RetrieveLatestJsonRates(It.IsAny <string>())).ReturnsAsync(this.rates);
var result = this.currencyConverter.ConvertCurrency(request);
Assert.IsNull(result);
}
public void WhenCallingGetWithInvalidRequestReturnBadRequest()
{
var request = new RequestFX()
{
Amount = "1.20",
SourceCurrency = "GBP",
TargetCurrency = "EUR"
};
this.converter.Setup(c => c.ConvertCurrency(request)).Returns((ResponseFX)null);
var result = this.controller.Get(request) as BadRequestResult;
Assert.AreEqual(400, result.StatusCode);
}
private bool ValidateRequest(RequestFX requestFx)
{
if (string.IsNullOrWhiteSpace(requestFx.Amount))
{
return(false);
}
if (string.IsNullOrWhiteSpace(requestFx.SourceCurrency))
{
return(false);
}
if (string.IsNullOrWhiteSpace(requestFx.TargetCurrency))
{
return(false);
}
return(true);
}
public void WhenCallingGetWithValidRequestReturnOK()
{
var request = new RequestFX()
{
Amount = "1.20",
SourceCurrency = "GBP",
TargetCurrency = "EUR"
};
this.converter.Setup(c => c.ConvertCurrency(request)).Returns(this.response);
var result = this.controller.Get(request) as OkObjectResult;
Assert.IsNotNull(result);
Assert.AreEqual(this.response, result.Value);
Assert.AreEqual(200, result.StatusCode);
}
public ResponseFX ConvertCurrency(RequestFX requestFx)
{
if (!this.ValidateRequest(requestFx))
{
return(null);
}
var rates = this.exchangeRates.RetrieveLatestJsonRates(requestFx.SourceCurrency).Result.Rates;
if (rates.ContainsKey(requestFx.TargetCurrency))
{
var convertedAmount = Convert.ToDouble(requestFx.Amount) * Convert.ToDouble(rates[requestFx.TargetCurrency]);
return(new ResponseFX()
{
TargetCurrency = requestFx.TargetCurrency, Amount = convertedAmount
});
}
return(null);
}
public void WhenCallingCurrencyConverterWithValidParametersReturnSuccessful()
{
var request = new RequestFX()
{
Amount = "1.00",
SourceCurrency = "GBP",
TargetCurrency = "EUR"
};
this.exchangeRates.Setup(e => e.RetrieveLatestJsonRates(It.IsAny <string>())).ReturnsAsync(this.rates);
var responseFx = new ResponseFX()
{
Amount = 1.16, TargetCurrency = "EUR"
};
var result = this.currencyConverter.ConvertCurrency(request);
Assert.IsNotNull(result);
Assert.AreEqual(responseFx.Amount, result.Amount);
Assert.AreEqual(responseFx.TargetCurrency, result.TargetCurrency);
}
