public async Task FetchAndSynceWeather_ReturnsNewData_WhenCachedOneHasExpired()
{
// Expire cache data, make it older than 4 hours
var lastFetchTime = DateTimeOffset.Now.AddHours(-4).ToUniversalTime();
var cacheWeatherOutput = new WeatherDto()
{
TimeFetched = lastFetchTime
};
var mockWeatherApi = new Mock <IWeatherApi>();
mockWeatherApi.Setup(api => api.GetWeatherForLocation(3)).Returns(Task.FromResult(TestDataGenerator.LocationWeather(3)));
var mockRepo = new Mock <IWeatherRepository>();
mockRepo.Setup(repo => repo.GetWeatherById(3)).Returns(Task.FromResult(new List <WeatherDto> {
cacheWeatherOutput
}));
// Act
var sut = new FetchManager.FetchManager(mockWeatherApi.Object, mockRepo.Object, new OpenWeatherSettings()
{
CacheExpiryMinutes = 180
});
var result = (await sut.FetchAndSyncWeatherForLocationAsync(3)).FirstOrDefault();
// Assert
Assert.NotNull(result);
Assert.Equal(4, (result.TimeFetched - lastFetchTime).Hours);
}
public async Task FetchAndSyncWeather_StoresNewDataInCache_WhenNoneExistsInCache()
{
// Expire cache data, by making it older than 4 hours
var weatherDto = FakerT <WeatherDto> .Generate();
weatherDto.LocaleId = 3;
var mockWeatherApi = new Mock <IWeatherApi>();
mockWeatherApi.Setup(api => api.GetWeatherForLocation(3)).Returns(Task.FromResult(TestDataGenerator.LocationWeather(3)));
var option = new DbContextOptionsBuilder <WeatherDbContext>().UseInMemoryDatabase("WeatherInMemoryDatabase").Options;
var dbContext = new WeatherDbContext(option);
var repository = new WeatherRepository(dbContext);
// Act
var sut = new FetchManager.FetchManager(mockWeatherApi.Object, repository, new OpenWeatherSettings()
{
CacheExpiryMinutes = 180
});
var result = (await sut.FetchAndSyncWeatherForLocationAsync(3)).FirstOrDefault();
// Assert
Assert.Equal(3, result.LocaleId);
var insertedObject = await repository.GetWeatherById(3);
Assert.Equal(3, insertedObject.Count);
}
public async Task FetchAndSyncWeather_ReturnsCachedData_WhenCachedVersionIsStillValid()
{
var lastFetchTime = DateTimeOffset.Now.AddHours(-2).ToUniversalTime();
var cacheWeatherOutput = new WeatherDto()
{
TimeFetched = lastFetchTime
};
;
// OpenWeather updates are three hours appart
// Free API's are limited to a number of calls per hour
// Goal is to create a cache that we only refresh when the data has expired.
var mockWeatherApi = new Mock <IWeatherApi>();
mockWeatherApi.Setup(api => api.GetWeatherForLocation(3)).Returns(Task.FromResult(TestDataGenerator.LocationWeather(3)));
var mockRepo = new Mock <IWeatherRepository>();
mockRepo.Setup(repo => repo.GetWeatherById(3)).Returns(Task.FromResult(new List <WeatherDto> {
cacheWeatherOutput
}));
// Act
var sut = new FetchManager.FetchManager(mockWeatherApi.Object, mockRepo.Object, new OpenWeatherSettings()
{
CacheExpiryMinutes = 180
});
var result = (await sut.FetchAndSyncWeatherForLocationAsync(3)).FirstOrDefault();
// Assert
Assert.NotNull(result);
Assert.True(result.TimeFetched.Equals(lastFetchTime));
}