public async Task GetCurrentWeatherAsync_CachesForCorrectPeriodOfTime_UsingStubsAndServiceProvider()
{
const int expectedMinsToCache = 101;
var stubCache = new StubDistributedCache();
var options = new ServiceCollection()
.Configure <ExternalServicesConfig>(ExternalServicesConfig.WeatherApi, opt =>
opt.MinsToCache = expectedMinsToCache)
.BuildServiceProvider()
.GetRequiredService <IOptionsMonitor <ExternalServicesConfig> >();
var sut = new CachedWeatherForecaster(new StubWeatherForecaster(), stubCache, options);
_ = await sut.GetCurrentWeatherAsync();
Assert.True(stubCache.ItemCached);
Assert.Equal(expectedMinsToCache, stubCache.CachedForMins);
}
public async Task GetCurrentWeatherAsync_CachesForCorrectPeriodOfTime()
{
const int expectedMinsToCache = 101;
int minsToCache = -1;
var forecasterMock = new Mock <IWeatherForecaster>();
forecasterMock.Setup(x => x.GetCurrentWeatherAsync())
.ReturnsAsync(new CurrentWeatherResult {
Description = "This is a weather description"
});
var cacheMock = new Mock <IDistributedCache <CurrentWeatherResult> >();
cacheMock.Setup(x => x.TryGetValueAsync(It.IsAny <string>())).
ReturnsAsync((false, (CurrentWeatherResult)null));
cacheMock.Setup(x => x
.SetAsync(It.IsAny <string>(), It.IsAny <CurrentWeatherResult>(), It.IsAny <int>()))
.Callback <string, CurrentWeatherResult, int>((key, result, mins) => minsToCache = mins);
var optionsMock = new Mock <IOptionsMonitor <ExternalServicesConfig> >();
optionsMock.Setup(x => x.Get(ExternalServicesConfig.WeatherApi))
.Returns(new ExternalServicesConfig {
MinsToCache = expectedMinsToCache
});
var sut = new CachedWeatherForecaster(forecasterMock.Object, cacheMock.Object, optionsMock.Object);
_ = await sut.GetCurrentWeatherAsync();
cacheMock.Verify(x => x.SetAsync(
It.IsAny <string>(), It.IsAny <CurrentWeatherResult>(), It.IsAny <int>()), Times.Once);
Assert.Equal(expectedMinsToCache, minsToCache);
}
