public void MemoryCacheManager_Should_Return_Value_And_Be_Able_To_Change_Existing_Value()
{
ICacheManager cacheManager = new MemoryCacheManager();
cacheManager.Add("Test", "Dit is de waarde...", new CacheItemPolicy());
cacheManager.AddOrOverwrite("Test", "Dit is de echte waarde...", new CacheItemPolicy());
string value = cacheManager.Get <string>("Test");
Assert.AreSame("Dit is de echte waarde...", value);
}