public async Task GivenARequestForAKeyFailed_WhenTheSameKeyIsQueriedAgainSomeTimeLater_ThenTheExpensiveOperationIsPerformedAgain()
{
var cache = new AsyncCache <string>(TimeSpan.FromMinutes(10));
var task1 = Assert.ThrowsAsync <ArgumentException>(() => cache.AddOrGetExisting("Key1", () => PerformExpensiveTask("Key1", true)));
await Task.Delay(600);
var task2 = cache.AddOrGetExisting("Key1", () => PerformExpensiveTask("Key1", false));
await Task.WhenAll(task1, task2);
Assert.NotNull(task1.Result);
Assert.Equal("Key1 Result", task2.Result);
Assert.Equal(_expensiveTaskCallCount, 2);
}
public async Task GivenARequestForAKey_WhenASecondRequestForADifferentKeyIsIssued_ThenTheExpensiveOperationIsPerformedAgain()
{
var cache = new AsyncCache <string>(TimeSpan.FromMinutes(10));
var task1 = cache.AddOrGetExisting("Key1", () => PerformExpensiveTask("Key1"));
await Task.Delay(100);
var task2 = cache.AddOrGetExisting("Key2", () => PerformExpensiveTask("Key2"));
var results = await Task.WhenAll(task1, task2);
Assert.Equal("Key1 Result", results[0]);
Assert.Equal("Key2 Result", results[1]);
Assert.Equal(_expensiveTaskCallCount, 2);
}