public void Cache_should_be_clear_on_demand()
{
ICache cache = new FifoCache();
for (int i = 0; i < 5; i++)
{
cache[i] = i;
}
Assert.That(cache[0], Is.Not.Null);
Assert.That(cache[4], Is.Not.Null);
cache.Clear();
Assert.That(cache[0], Is.Null);
Assert.That(cache[4], Is.Null);
}