public void RemoveLru()
{
var ld = new RecentDictionary <string, int>();
for (int i = 0; i < 42; i++)
{
ld.Add(i.ToString(), i);
}
ld.RemoveLeastRecent();
Assert.False(ld.ContainsKey("0"));
Assert.True(ld.ContainsKey("1"));
Assert.Equal(41, ld.Count);
// Access the least-recently used element, make
// sure it doesn't get removed.
Assert.Equal(1, ld["1"]);
ld.RemoveLeastRecent();
Assert.True(ld.ContainsKey("1"));
Assert.False(ld.ContainsKey("2"));
}
