Enterprise Library Test Guide - Willy .Net

Testing the Application Block 31
Code test case Implemented? Feature that is implemented
Verify that the application
block performs scavenging
when the cached items
exceed the configured limit.
In addition, verify that the
number of items to be scavenged
is configurable.
Yes
When an item is added to an instance of the
Cache class, the application block checks to
see if the limit set in the configuration source
has been reached. If it has, the scavenging
process begins. This is shown in the following
code example.
public void Add(…)
{
if (scavengingPolicy.IsScavengingNeeded
(inMemoryCache.Count))
{
cacheScavenger.StartScavenging();
}
}
The number of items that are scavenged
depends on the value set in the configuration
source. This value is injected into the ScavengerTask
class. The RemoveScavengableItems
method checks for this value before it removes
the specified number of items from the cache.
This is shown in the following code example.
private void RemoveScavengableItems(Sor
tedList scavengableItems)
{
int scavengedItemCount = 0;
foreach (CacheItem scavengableItem in
scavengableItems.Values)
{
…
if (scavengedItemCount == NumberOfItemsToBeScavenged)
{
break;
}
}
}
continued