public async Task GetItemAsync_OfCacheableStructRequestedMultipleTimesInSuccession_CallsRetrievalDelegateJustOnce()
{
// Arrange
CacheableStruct cacheableStruct = new CacheableStruct(100);
InMemoryItemCache <CacheableStruct> cache = new InMemoryItemCache <CacheableStruct>(
() => { return(Task.FromResult(cacheableStruct.GetSelf())); },
null,
TimeSpan.FromMinutes(2));
int actualResult;
int expectedResult = 1;
// Act
_ = await cache.GetItemAsync();
_ = await cache.GetItemAsync();
_ = await cache.GetItemAsync();
_ = await cache.GetItemAsync();
actualResult = cacheableStruct.NumberOfGetSelfCalls;
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public async Task GetItemAsync_OfCacheableClassWhenCalledTwice_DoesNotReturnSameInstance()
{
// Arrange
InMemoryItemCache <CacheableClass> cache = new InMemoryItemCache <CacheableClass>(
() => { return(Task.FromResult(new CacheableClass(100))); },
null,
TimeSpan.FromMilliseconds(100));
CacheableClass cacheItem1;
CacheableClass cacheItem2;
// Act
cacheItem1 = await cache.GetItemAsync();
cacheItem2 = await cache.GetItemAsync();
// Assert that full, deep cloning is being performed
Assert.AreNotEqual(cacheItem1, cacheItem2);
Assert.AreNotEqual(cacheItem1.Child, cacheItem2.Child);
}
public async Task GetItemAsync_OfCacheableClassWhenCalledTwice_CreatesPerfectClone()
{
// Arrange
InMemoryItemCache <CacheableClass> cache = new InMemoryItemCache <CacheableClass>(
() => { return(Task.FromResult(new CacheableClass(100))); },
null,
TimeSpan.FromMilliseconds(100));
CacheableClass cacheItem1;
CacheableClass cacheItem2;
// Act
cacheItem1 = await cache.GetItemAsync();
cacheItem2 = await cache.GetItemAsync();
// Assert that the clone worked correctly
Assert.AreEqual(cacheItem1.GetValue(), cacheItem2.GetValue());
Assert.AreEqual(cacheItem1.NumberOfCalls, cacheItem2.NumberOfCalls);
Assert.AreEqual(cacheItem1.CreatedAt, cacheItem2.CreatedAt);
}
public async Task GetItemAsync_OfCacheableClassWhenCacheExpires_CallsRetrievalDelegateAgain()
{
// Arrange
InMemoryItemCache <CacheableClass> cache = new InMemoryItemCache <CacheableClass>(
() => { return(Task.FromResult(new CacheableClass(100))); },
null,
TimeSpan.FromMilliseconds(100));
DateTime initialCreatedAt;
DateTime finalCreatedAt;
CacheableClass cacheItem;
// Act
cacheItem = await cache.GetItemAsync();
initialCreatedAt = cacheItem.CreatedAt;
// Wait for the cache item to expire and then retry
TimeDelay.WaitFor(150);
cacheItem = await cache.GetItemAsync();
finalCreatedAt = cacheItem.CreatedAt;
// Assert that the creation values are different
Assert.AreNotEqual(initialCreatedAt, finalCreatedAt);
}
public async Task GetItemAsync_OfCacheableClassRequestedMultipleTimesInSuccession_CallsRetrievalDelegateJustOnce()
{
// Arrange
InMemoryItemCache <CacheableClass> cache = new InMemoryItemCache <CacheableClass>(
() => { return(Task.FromResult(new CacheableClass(100))); },
null,
TimeSpan.FromMilliseconds(100));
DateTime initialCreatedAt;
DateTime finalCreatedAt;
CacheableClass cacheItem;
// Act
cacheItem = await cache.GetItemAsync();
initialCreatedAt = cacheItem.CreatedAt;
_ = cache.GetItemAsync();
_ = cache.GetItemAsync();
cacheItem = await cache.GetItemAsync();
finalCreatedAt = cacheItem.CreatedAt;
// Assert
Assert.AreEqual(initialCreatedAt, finalCreatedAt);
}
public async Task GetItemAsync_OfCacheableStruct_ReturnsCorrectCachedValue()
{
// Arrange
CacheableStruct cacheableStruct = new CacheableStruct(100);
InMemoryItemCache <CacheableStruct> cache = new InMemoryItemCache <CacheableStruct>(
() => { return(Task.FromResult(cacheableStruct.GetSelf())); },
null,
TimeSpan.FromMinutes(2));
int actualResult;
int expectedResult = 100;
// Act
actualResult = (await cache.GetItemAsync()).GetValue();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public async Task GetItemAsync_OfInt_ReturnsCorrectCachedValue()
{
// Arrange
InMemoryItemCache <int> cache = new InMemoryItemCache <int>(
new NonCloningClonerFactory <int>(),
() => { return(Task.FromResult(100)); },
null,
TimeSpan.FromMinutes(2),
100, 100);
int actualResult;
int expectedResult = 100;
// Act
actualResult = await cache.GetItemAsync();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public async Task GetItemAsync_OfCacheableClass_ReturnsCorrectCachedValue()
{
// Arrange
InMemoryItemCache <CacheableClass> cache = new InMemoryItemCache <CacheableClass>(
() => { return(Task.FromResult(new CacheableClass(100))); },
null,
TimeSpan.FromMinutes(2),
100, 100);
CacheableClass cacheItem;
int actualResult;
int expectedResult = 100;
// Act
cacheItem = await cache.GetItemAsync();
actualResult = cacheItem.GetValue();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public void GetItemAsync_OfCacheableClassWhenInitialRetrievalTimesOut_ReturnsDefaultValueOfNull()
{
// Arrange
InMemoryItemCache <CacheableClass> cache = new InMemoryItemCache <CacheableClass>(
async() => { await TimeDelay.WaitForAsync(200); return(new CacheableClass(100)); },
null,
TimeSpan.FromMinutes(2),
50, 50);
CacheableClass cacheItem;
// Act
Task <CacheableClass> task1 = cache.GetItemAsync();
Task <CacheableClass> task2 = AwaitDelayAndGetItemFromCacheableClassCacheAsync(50, cache);
// Start the 2 tasks, with task2 likely to have to wait on task1
Task.WaitAll(task1, task2);
cacheItem = task2.Result;
// Assert
Assert.IsNull(cacheItem);
}
public void GetItemAsync_OfIntWhenInitialRetrievalTimesOut_ReturnsDefaultValueOfZero()
{
// Arrange
InMemoryItemCache <int> cache = new InMemoryItemCache <int>(
new NonCloningClonerFactory <int>(),
async() => { await TimeDelay.WaitForAsync(200); return(125); },
null,
TimeSpan.FromMinutes(2),
50, 50);
int actualResult;
int expectedResult = 0;
// Act
Task <int> task1 = cache.GetItemAsync();
Task <int> task2 = AwaitDelayAndGetItemFromIntCacheAsync(50, cache);
// Start the 2 tasks, with task2 likely to have to wait on task1
Task.WaitAll(task1, task2);
actualResult = task2.Result;
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
private async Task <CacheableClass> AwaitDelayAndGetItemFromCacheableClassCacheAsync(int delayPeriod, InMemoryItemCache <CacheableClass> cache)
{
await TimeDelay.WaitForAsync(delayPeriod);
return(await cache.GetItemAsync());
}