private RateResult GetLatest()
{
RateResult rates;
var nextCallTime = _memoryCacheService.GetTimeForNextCall();
if (nextCallTime > DateTime.UtcNow)
{
rates = _memoryCacheService.GetLatestFromCache();
}
else
{
try
{
rates = _rateClient.GetLatest();
_memoryCacheService.SaveLatestToCache(rates);
_memoryCacheService.UpdateTimeForNextCall();
}
catch (Exception ex)
{
rates = _memoryCacheService.GetLatestFromCache();
}
}
//save to cashe
return(rates);
}
public void GetLatestForFreePlan_WithInvalidApiKey_ThrowsException()
{
var sut = new RateClient("invalid");
var ex = Assert.Throws <Exception>(() => sut.GetLatest());
Assert.IsTrue(ex.Message.Contains("Invalid API key"));
}
public void GetLatestForFreePlan_WithValidApiKey_ReturnsRates()
{
var sut = new RateClient(ApiKey);
var result = sut.GetLatest();
Assert.NotNull(result);
Assert.IsTrue(result.Rates.Any());
}