public void WhenActiveCacheItemRemovedThenGetOrCreateTriggersUpdate()
{
// arrange
var expectedResult = "expectedResult";
var unexpectedResult = "unexpectedResult";
var cacheKey = "key";
var triggerUpdate = false;
using (var cache = new SaintModeCache())
{
var policy = new CacheItemPolicy {
AbsoluteExpiration = ObjectCache.InfiniteAbsoluteExpiration
};
cache.GetOrCreate(cacheKey, (key, cancel) => unexpectedResult, policy);
cache.Remove(cacheKey);
var ewh = new EventWaitHandle(false, EventResetMode.ManualReset);
// act
cache.GetOrCreate(cacheKey, (key, cancel) =>
{
triggerUpdate = true;
ewh.Set();
return(expectedResult);
}, policy);
// assert
ewh.WaitOne(5000);
Assert.That(triggerUpdate, Is.True);
}
}
public void WhenCacheIsEmptyAndCacheItemPolicyOverrideOnUpdateWithNullThenUseDefaultPolicy()
{
// arrange
var expectedResult = "expectedResult";
var cacheKey = "key";
var defaultTimeout = 1;
var defaultPolicy = new CacheItemPolicy
{
AbsoluteExpiration = DateTime.UtcNow.AddSeconds(defaultTimeout)
};
using (var cache = new SaintModeCache())
{
var startTests = new EventWaitHandle(false, EventResetMode.ManualReset);
// act
cache.GetOrCreate(cacheKey, (key, cancel) =>
{
cancel.CacheItemPolicy = null;
startTests.Set();
return(expectedResult);
}, defaultPolicy);
// assert
startTests.WaitOne();
Thread.Sleep(defaultTimeout * 1000);
Assert.That(cache.Expired(cacheKey), Is.True);
}
}
public void WhenStaleCacheItemThenGetOrCreateAfterAnUpdateCompletesReturnsUpdatedItem()
{
// arrange
var expectedResult = "expectedResult";
var unexpectedResult = "unexpectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var policy = new CacheItemPolicy {
AbsoluteExpiration = DateTime.UtcNow.AddMilliseconds(10)
};
cache.GetOrCreate(cacheKey, (key, cancel) => unexpectedResult, policy);
Thread.Sleep(20);
var startTests = new EventWaitHandle(false, EventResetMode.ManualReset);
cache.GetOrCreate(cacheKey, (key, cancel) =>
{
startTests.Set();
return(expectedResult);
}, ObjectCache.InfiniteAbsoluteExpiration);
startTests.WaitOne();
Thread.Sleep(20);
// act
var cacheValue = cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, policy);
// assert
Assert.That(cacheValue, Is.EqualTo(expectedResult));
}
}
public void WhenStaleCacheItemThenGetOrCreateReturnsCachedValueAndTriggersUpdate()
{
// arrange
var expectedResult = "expectedResult";
var unexpectedResult = "unexpectedResult";
var cacheKey = "key";
var triggerUpdate = false;
using (var cache = new SaintModeCache())
{
var policy = new CacheItemPolicy {
AbsoluteExpiration = DateTime.UtcNow.AddMilliseconds(10)
};
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, policy);
Thread.Sleep(20);
var startTests = new EventWaitHandle(false, EventResetMode.ManualReset);
// act
var cacheValue = cache.GetOrCreate(cacheKey, (key, cancel) =>
{
triggerUpdate = true;
startTests.Set();
return(unexpectedResult);
}, policy);
// assert
Assert.That(cacheValue, Is.EqualTo(expectedResult));
startTests.WaitOne();
Assert.That(triggerUpdate, Is.True);
}
}
public void WhenStaleCacheItemExistsAndCancellationTokenUsedThenReturnStaleItem()
{
// arrange
var expectedResult = "expectedResult";
var unexpectedResult = "unexpectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var startTests = new EventWaitHandle(false, EventResetMode.ManualReset);
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, DateTime.UtcNow.AddMilliseconds(10));
Thread.Sleep(20);
// act
var cacheValue = cache.GetOrCreate(cacheKey, (key, cancel) =>
{
cancel.IsCancellationRequested = true;
startTests.Set();
return(unexpectedResult);
});
// assert
startTests.WaitOne();
Thread.Sleep(20);
Assert.That(cacheValue, Is.EqualTo(expectedResult));
}
}
public void WhenEmptyCacheAndMultipleThreadsUpdateValueThenOnlyOneTheadUpdatesValue()
{
// arrange
var expectedResult = "expectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var counter = 0;
var startTests = new EventWaitHandle(false, EventResetMode.ManualReset);
var waitForTests = new EventWaitHandle(false, EventResetMode.ManualReset);
// act //assert
for (var i = 0; i < 1000; i++)
{
Func <object> testCache = () =>
{
startTests.WaitOne();
return(cache.GetOrCreate(cacheKey, (key, cancel) =>
{
Interlocked.Increment(ref counter);
return expectedResult;
}));
};
testCache.BeginInvoke(re =>
{
var result = testCache.EndInvoke(re);
try
{
Assert.That(result, Is.EqualTo(expectedResult));
Assert.That(counter, Is.LessThanOrEqualTo(1));
}
catch
{
waitForTests.Set();
throw;
}
if ((int)re.AsyncState == 999)
{
waitForTests.Set();
}
}, i);
}
startTests.Set();
waitForTests.WaitOne();
Assert.That(counter, Is.EqualTo(1));
}
}
public void WhenEmptyCacheThenGetWithoutCreateOrNullReturnsNull()
{
// arrange
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
// act
var result = cache.GetWithoutCreateOrNull(cacheKey);
// assert
Assert.That(result, Is.Null);
}
}
public void WhenEmptyCacheThenGetOrCreateReturnsUpdateItem()
{
// arrange
var expectedResult = "value";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
// act
var cacheValue = cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult,
ObjectCache.InfiniteAbsoluteExpiration);
// assert
Assert.That(cacheValue, Is.EqualTo(expectedResult));
}
}
public void WhenCustomCacheIsUsedThenCacheItemsAreAddedToCustomCache()
{
// arrange
var expectedResult = "value";
var cacheKey = "key";
var memoryCache = new MemoryCache("CustomCache", null);
using (var cache = new SaintModeCache(memoryCache))
{
// act
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, ObjectCache.InfiniteAbsoluteExpiration);
// assert
Assert.That(memoryCache[cacheKey], Is.EqualTo(expectedResult));
}
}
public void WhenInfiniteAbsoluteExpirationCacheItemThenItemIsNotStale()
{
// arrange
var expectedResult = "expectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, ObjectCache.InfiniteAbsoluteExpiration);
// act
var result = cache.Stale(cacheKey);
// assert
Assert.That(result, Is.False);
}
}
public void WhenActiveCacheItemThenGetWithoutCreateOrNullReturnsItem()
{
// arrange
var expectedResult = "expectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, ObjectCache.InfiniteAbsoluteExpiration);
// act
var result = cache.GetWithoutCreateOrNull(cacheKey);
// assert
Assert.That(result, Is.EqualTo(expectedResult));
}
}
public void WhenActiveCacheItemThenGetWithoutCreateOrNullKeyIsCaseSensitive()
{
// arrange
var expectedResult1 = "expectedResult1";
var cacheKey1 = "key";
var cacheKey2 = "KEY";
using (var cache = new SaintModeCache())
{
cache.SetOrUpdateWithoutCreate(cacheKey1, expectedResult1, ObjectCache.InfiniteAbsoluteExpiration);
// act
var result = cache.GetWithoutCreateOrNull(cacheKey2);
// assert
Assert.That(result, Is.Null);
}
}
public void WhenGetOrCreateWithActiveCacheItemThenNoUpdateToCache()
{
// arrange
var expectedResult = "expectedResult";
var unexpectedResult = "unexpectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
cache.SetOrUpdateWithoutCreate(cacheKey, expectedResult, ObjectCache.InfiniteAbsoluteExpiration);
// act
var result = cache.GetOrCreate(cacheKey, (key, cancel) => unexpectedResult,
ObjectCache.InfiniteAbsoluteExpiration);
// assert
Assert.That(result, Is.EqualTo(expectedResult));
}
}
public void WhenActiveCacheItemThenIsNotExpired()
{
// arrange
var expectedResult = "expectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var policy = new CacheItemPolicy {
AbsoluteExpiration = ObjectCache.InfiniteAbsoluteExpiration
};
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, policy);
// act
var result = cache.Expired(cacheKey);
// assert
Assert.That(result, Is.False);
}
}
public void WhenStaleCacheItemThenItemIsStale()
{
// arrange
var expectedResult = "expectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var policy = new CacheItemPolicy {
AbsoluteExpiration = DateTime.UtcNow.AddMilliseconds(10)
};
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, policy);
Thread.Sleep(20);
// act
var result = cache.Stale(cacheKey);
// assert
Assert.That(result, Is.True);
}
}
public void WhenSetOrUpdateWithoutCreateThenGetWithoutCreateOrNullKeyIsCaseSensitive()
{
// arrange
var expectedResult1 = "expectedResult1";
var expectedResult2 = "expectedResult2";
var cacheKey1 = "key";
var cacheKey2 = "KEY";
using (var cache = new SaintModeCache())
{
cache.SetOrUpdateWithoutCreate(cacheKey1, expectedResult1);
cache.SetOrUpdateWithoutCreate(cacheKey2, expectedResult2);
// act
var result1 = cache.GetWithoutCreateOrNull(cacheKey1);
var result2 = cache.GetWithoutCreateOrNull(cacheKey2);
// assert
Assert.That(result1, Is.EqualTo(expectedResult1));
Assert.That(result2, Is.EqualTo(expectedResult2));
}
}
public void WhenInfiniteAbsoluteExpirationCacheItemThenGetOrCreateUpdatesCachePolicy()
{
// arrange
var expectedResult = "expectedResult";
var unexpectedResult = "unexpectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var policy = new CacheItemPolicy {
AbsoluteExpiration = DateTime.UtcNow.AddMilliseconds(10)
};
cache.GetOrCreate(cacheKey, (key, cancel) => unexpectedResult, ObjectCache.InfiniteAbsoluteExpiration);
cache.SetOrUpdateWithoutCreate(cacheKey, expectedResult, policy);
Thread.Sleep(20);
// act
var result = cache.Stale(cacheKey);
// assert
Assert.That(result, Is.True);
}
}
public void WhenCacheIsEmptyAndCancellationTokenUsedOnUpdateThenDontCacheAndReturnNull()
{
// arrange
var unexpectedResult = "unexpectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var startTests = new EventWaitHandle(false, EventResetMode.ManualReset);
// act
var cacheValue = cache.GetOrCreate(cacheKey, (key, cancel) =>
{
cancel.IsCancellationRequested = true;
startTests.Set();
return(unexpectedResult);
});
// assert
startTests.WaitOne();
Thread.Sleep(20);
Assert.That(cacheValue, Is.Null);
}
}
public void WhenStaleCacheAndMultipleThreadsGetValueThenOnlyOneThreadUpdatesValue()
{
// arrange
var expectedResult = "expectedResult";
var cacheKey = "key";
using (var cache = new SaintModeCache())
{
var policy = new CacheItemPolicy {
AbsoluteExpiration = DateTime.UtcNow.AddMilliseconds(10)
};
cache.GetOrCreate(cacheKey, (key, cancel) => expectedResult, policy);
Thread.Sleep(200);
var counter = 0;
var startTests = new EventWaitHandle(false, EventResetMode.ManualReset);
var waitForTests = new EventWaitHandle(false, EventResetMode.ManualReset);
var waitForResult = new EventWaitHandle(false, EventResetMode.ManualReset);
var triggerUpdate = false;
// act //assert
for (var i = 0; i < 1000; i++)
{
Func <object> testCache = () =>
{
startTests.WaitOne();
return(cache.GetOrCreate(cacheKey, (key, cancel) =>
{
triggerUpdate = true;
Interlocked.Increment(ref counter);
waitForResult.Set();
return expectedResult;
}, policy));
};
testCache.BeginInvoke(re =>
{
var result = testCache.EndInvoke(re);
try
{
Assert.That(result, Is.EqualTo(expectedResult));
Assert.That(counter, Is.LessThanOrEqualTo(1));
}
catch
{
waitForTests.Set();
waitForResult.Set();
throw;
}
if ((int)re.AsyncState != 999)
{
return;
}
waitForTests.Set();
}, i);
}
startTests.Set();
waitForTests.WaitOne();
waitForResult.WaitOne();
Assert.That(triggerUpdate, Is.True);
}
}
