public void TestCachingWrapperSimple()
{
_cacheMisses = 0;
var cachedSource = new CachingWrapper<int, string>(DatabaseCallMock, 0);
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0)); // Second try should retrieve it from cache
Assert.AreEqual(1, _cacheMisses, "There should only be one miss!");
}
public void TestCachingWrapperSimple()
{
_cacheMisses = 0;
var cachedSource = new CachingWrapper <int, string>(DatabaseCallMock, 0);
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0)); // Second try should retrieve it from cache
Assert.AreEqual(1, _cacheMisses, "There should only be one miss!");
}
public void TestCachingWrapperWithCapacity()
{
_cacheMisses = 0;
var cachedSource = new CachingWrapper<int, string>(DatabaseCallMock, 5);
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(1), cachedSource.Retrieve(1)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(2), cachedSource.Retrieve(2)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(3), cachedSource.Retrieve(3)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(4), cachedSource.Retrieve(4)); // First try should cache it (cache miss)
// Make sure 0 element is cached properly (should not increase the cache misses)
// This should also put element 0 on top, making element 1 the last (and a candidate for removal)
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0), "Wrong element was returned from cache!");
Assert.AreEqual(5, _cacheMisses, "There should be 5 cache misses so far");
// The following statement should cause a capacity overflow which should discard the last element
// The last element should be element 1
Assert.AreEqual(MockedResult(5), cachedSource.Retrieve(5));
Assert.AreEqual(6, _cacheMisses, "There should be 6 cache misses so far");
// Since element 1 should be out of cache, a call to it should increase the misses by one.
Assert.AreEqual(MockedResult(1), cachedSource.Retrieve(1), "Wrong element was returned from cache!");
Assert.AreEqual(7, _cacheMisses, "There should be 7 cache misses so far");
}
public void TestCachingWrapperWithCapacity()
{
_cacheMisses = 0;
var cachedSource = new CachingWrapper <int, string>(DatabaseCallMock, 5);
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(1), cachedSource.Retrieve(1)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(2), cachedSource.Retrieve(2)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(3), cachedSource.Retrieve(3)); // First try should cache it (cache miss)
Assert.AreEqual(MockedResult(4), cachedSource.Retrieve(4)); // First try should cache it (cache miss)
// Make sure 0 element is cached properly (should not increase the cache misses)
// This should also put element 0 on top, making element 1 the last (and a candidate for removal)
Assert.AreEqual(MockedResult(0), cachedSource.Retrieve(0), "Wrong element was returned from cache!");
Assert.AreEqual(5, _cacheMisses, "There should be 5 cache misses so far");
// The following statement should cause a capacity overflow which should discard the last element
// The last element should be element 1
Assert.AreEqual(MockedResult(5), cachedSource.Retrieve(5));
Assert.AreEqual(6, _cacheMisses, "There should be 6 cache misses so far");
// Since element 1 should be out of cache, a call to it should increase the misses by one.
Assert.AreEqual(MockedResult(1), cachedSource.Retrieve(1), "Wrong element was returned from cache!");
Assert.AreEqual(7, _cacheMisses, "There should be 7 cache misses so far");
}
private IterationResults IterativeTest(int iterations, int capacityDivisor)
{
var stopwatch = new Stopwatch();
_cacheMisses = 0;
int capacity = (capacityDivisor == 0) ? 0 : (iterations / capacityDivisor);
var cachedSource = new CachingWrapper <int, string>(DatabaseCallMock, capacity);
stopwatch.Start();
var random = new Random();
for (int i = 0; i < iterations - 1; i++)
{
int num = random.Next(1, iterations);
cachedSource.Retrieve(num);
}
stopwatch.Stop();
decimal missRatio = (100 / (decimal)iterations) * _cacheMisses;
return(new IterationResults {
MissRatio = missRatio, Elapsed = stopwatch.ElapsedMilliseconds
});
//Console.WriteLine("Iterations : {0:0000}, Capacity: {1:0000} (1/{2}), Cache misses: {3:0000}, Miss ratio: {4:00.00}% - Hit ratio: {5:00.00}%, Elapsed: {6}ms", iterations, capacity, capacityDivisor, _cacheMisses, MissRatio, 100 - MissRatio, stopwatch.ElapsedMilliseconds);
}
private IterationResults IterativeTest(int iterations, int capacityDivisor)
{
var stopwatch = new Stopwatch();
_cacheMisses = 0;
int capacity = (capacityDivisor == 0) ? 0 : (iterations / capacityDivisor);
var cachedSource = new CachingWrapper<int, string>(DatabaseCallMock, capacity);
stopwatch.Start();
var random = new Random();
for (int i = 0; i < iterations - 1; i++)
{
int num = random.Next(1, iterations);
cachedSource.Retrieve(num);
}
stopwatch.Stop();
decimal missRatio = (100 / (decimal)iterations) * _cacheMisses;
return new IterationResults {MissRatio = missRatio, Elapsed = stopwatch.ElapsedMilliseconds};
//Console.WriteLine("Iterations : {0:0000}, Capacity: {1:0000} (1/{2}), Cache misses: {3:0000}, Miss ratio: {4:00.00}% - Hit ratio: {5:00.00}%, Elapsed: {6}ms", iterations, capacity, capacityDivisor, _cacheMisses, MissRatio, 100 - MissRatio, stopwatch.ElapsedMilliseconds);
}