public async Task WhenCacheDoesNotContainItem_ThenAccessIsInvoked()
{
var expectedRequest = new ExchangeRatesRequest("BASE", DateTime.UtcNow);
var accessMock = new Mock <IExchangeRatesAccess>();
ExchangeRatesRequest actualRequest = null;
accessMock.Setup(m => m.GetRates(It.IsAny <ExchangeRatesRequest>()))
.Callback <ExchangeRatesRequest>(request => actualRequest = request)
.ReturnsAsync(new ExchangeRatesResponse(
expectedRequest.BaseCurrency,
expectedRequest.Date,
new Dictionary <string, decimal>()));
var cachingAccess = new CachingExchangeRatesAccess(new MemoryCache("rates"), accessMock.Object);
await cachingAccess.GetRates(expectedRequest);
actualRequest.Should().BeEquivalentTo(expectedRequest);
}
public async Task WhenLatestRatesAreRetrieved_ThenAccessDefaultRequestIsUsed()
{
var expectedRequest = new ExchangeRatesRequest("DEFAULTBase", DateTime.MaxValue);
var accessMock = new Mock <IExchangeRatesAccess>();
accessMock.SetupGet(m => m.DefaultRequest).Returns(expectedRequest);
ExchangeRatesRequest actualRequest = null;
accessMock.Setup(m => m.GetRates(It.IsAny <ExchangeRatesRequest>()))
.Callback <ExchangeRatesRequest>(request => actualRequest = request)
.ReturnsAsync(new ExchangeRatesResponse(
"blah",
DateTime.UtcNow,
new Dictionary <string, decimal>()));
var manager = new ExchangeRatesManager(accessMock.Object, Mock.Of <IExchangeRatesEngine>());
await manager.GetLatestRates();
actualRequest.Should().Be(expectedRequest);
}