public void AttemptToRemoveItemThatIsNotInTheCache()
{
// arrange
const string key = "test";
const int returnValue = 12;
var retrievalFixture = new RetrievalFixture <int>(returnValue);
var sut = new MemoryCacheWrapper <int>
{
CachePolicy = new CacheItemPolicy(),
DataRetrievalFunc = retrievalFixture.DataRetrievalFunc
};
// act
var removed = sut.RemoveFromCacheAsync(key).Result;
// assert
removed.Should().BeFalse();
}
public async Task CheckingIfCacheContainsKeyWhenTheCacheDoesNotContainTheItemReturnsFalse()
{
// arrange
const string key = "test";
var cacheItemDummy = new CacheItemFixture();
var retrievalFixture = new RetrievalFixture <CacheItemFixture>(cacheItemDummy);
var sut = new MemoryCacheWrapper <CacheItemFixture>
{
CachePolicy = new CacheItemPolicy(),
DataRetrievalFunc = retrievalFixture.DataRetrievalFunc
};
// act
var result = await sut.ContainsKeyAsync(key);
// assert
result.Should().BeFalse();
}
public void RetrievingItemFromTheCacheReturnsTheCorrectItem()
{
// arrange
const string key = "test";
var cacheItemDummy = new CacheItemFixture();
var retrievalFixture = new RetrievalFixture <CacheItemFixture>(cacheItemDummy);
var sut = new MemoryCacheWrapper <CacheItemFixture>
{
CachePolicy = new CacheItemPolicy(),
DataRetrievalFunc = retrievalFixture.DataRetrievalFunc
};
var firstRetrieval = sut.GetAsync(key).Result;
// act
var secondRetrieval = sut.GetAsync(key).Result;
// assert
firstRetrieval.Should().Be(secondRetrieval);
}
public void AddItemToTheCache()
{
// arrange
const string key = "test";
const int returnValue = 12;
var retrievalFixture = new RetrievalFixture <int>(returnValue);
var sut = new MemoryCacheWrapper <int>
{
CachePolicy = new CacheItemPolicy(),
DataRetrievalFunc = retrievalFixture.DataRetrievalFunc
};
// act
var result = sut.GetAsync(key).Result;
// assert
sut.ItemsInCache.Should().Be(1);
retrievalFixture.WasCalled.Should().BeTrue();
result.Should().Be(returnValue);
}
public void RemoveItemFromCache()
{
// arrange
const string key = "test";
const int returnValue = 12;
var retrievalFixture = new RetrievalFixture <int>(returnValue);
var sut = new MemoryCacheWrapper <int>
{
CachePolicy = new CacheItemPolicy(),
DataRetrievalFunc = retrievalFixture.DataRetrievalFunc
};
sut.GetAsync(key).Wait();
// act
var removed = sut.RemoveFromCacheAsync(key).Result;
// assert
removed.Should().BeTrue();
sut.ItemsInCache.Should().Be(0);
}
public void MultipleRetrievalsOnlyHitTheRetrievalFuncitonOnce()
{
// arrange
const string key = "test";
const int returnValue = 12;
var retrievalFixture = new RetrievalFixture <int>(returnValue);
var sut = new MemoryCacheWrapper <int>
{
CachePolicy = new CacheItemPolicy(),
DataRetrievalFunc = retrievalFixture.DataRetrievalFunc
};
// act
Parallel.For(0, 10, t =>
{
sut.GetAsync(key).Wait();
});
// assert
retrievalFixture.CallCount.Should().Be(1);
}
