public void RemoveEntry()
{
// arrange
var cacheSize = 10;
var cache = new TaskCache(cacheSize);
var key = new TaskCacheKey("a", "Foo");
var value = Task.FromResult("Bar");
cache.TryAdd(key, value);
// act
cache.TryRemove(key);
// assert
Task <string> retrieved = cache.GetOrAddTask(key, () => Task.FromResult("Baz"));
Assert.NotSame(value, retrieved);
}