public void TestExpiredItemsSweeped()
{
TimeSpan sweepTimer = TimeSpan.FromMilliseconds(800);
bool timerInactivated = false;
AgeBasedCache <int, int> cache = AgeBasedCache <int, int> .CreateInstanceForTestingOnly(sweepTimer, TimeSpan.MaxValue, () => timerInactivated = true);
cache.Clear();
int i = 0;
int cleanedUpItems = 0;
for (; i < AgeBasedCache <int, int> .MaxCacheCount; ++i)
{
Assert.IsTrue(cache.TryAddOrUpdate(i, i, TimeSpan.FromMilliseconds(100), (item => cleanedUpItems++)), "Cache Add expected to Pass but failed");
}
// Wait for sweep to happen
Threading.Thread.Sleep(sweepTimer + sweepTimer);
Assert.IsTrue(cleanedUpItems == i, string.Format("Actual cleaned up Count: {0}. Expected {1}", cleanedUpItems, i));
Assert.IsTrue(cache.Count == 0);
Assert.IsFalse(timerInactivated, "Timer shouldn't have been inactivated");
Assert.IsTrue(cache.TryAddOrUpdate(i, i, sweepTimer, null), "Cache Add expected to Pass but failed");
Assert.IsTrue(cache.Count == 1);
// Wait for sweep to happen
Threading.Thread.Sleep(sweepTimer + sweepTimer);
// Make sure item sweeped
Assert.IsTrue(cache.Count == 0);
}
public void TestCacheSweepsAfterTimerInactivity()
{
TimeSpan sweepTimer = TimeSpan.FromMilliseconds(800);
bool timerInactivated = false;
AgeBasedCache <int, int> cache = AgeBasedCache <int, int> .CreateInstanceForTestingOnly(sweepTimer, sweepTimer, () => timerInactivated = true);
// start with clean slate
cache.Clear();
int cleanedUpItems = 0;
Assert.IsTrue(cache.TryAddOrUpdate(1, 1, TimeSpan.FromMilliseconds(100), (item => cleanedUpItems++)), "Cache Add expected to Pass but failed");
// Wait for sweep to happen
Threading.Thread.Sleep(sweepTimer + sweepTimer);
Assert.IsTrue(cleanedUpItems == 1, string.Format("Actual cleaned up Count: {0}. Expected 1", cleanedUpItems));
Assert.IsTrue(cache.Count == 0, "We expect 0 items in cache");
Assert.IsTrue(timerInactivated, "Time is supposed to be inactivated");
// Add another Item.
Assert.IsTrue(cache.TryAddOrUpdate(2, 2, sweepTimer, null), "Cache Add expected to Pass but failed");
// Wait for sweep to happen
Threading.Thread.Sleep(sweepTimer + sweepTimer);
// Make sure timer get started again and item get sweeped
Assert.IsTrue(cache.Count == 0);
}
public void TestCacheMaxBoundScenario()
{
AgeBasedCache <int, int> cache = AgeBasedCache <int, int> .DefaultInstance;
int i = 0;
for (; i < AgeBasedCache <int, int> .MaxCacheCount; ++i)
{
Assert.IsTrue(
cache.TryAddOrUpdate(i, i, TimeSpan.FromSeconds(AgeBasedCache <int, int> .DefaultCleanupDurationInSec + 10), null),
"Cache Add expected to Pass but failed");
}
Assert.IsTrue(cache.Count == AgeBasedCache <int, int> .MaxCacheCount, "Expected Count != Actual Count");
Assert.IsFalse(cache.TryAddOrUpdate(i, i, TimeSpan.FromSeconds(10), null), "Cache Add expected to fail but Passed");
cache.Clear();
Assert.IsTrue(cache.TryAddOrUpdate(i, i, TimeSpan.FromSeconds(10), null), "Cache Add expected to Pass but Failed");
// Cleanup
cache.Clear();
}
