public void Test_All_Methods()
{
var global = new GlobalFilterCollection();
Assert.True(global.Count == 0);
Assert.Throws <ArgumentNullException>(() => global.Add(null));
var filter = new Filter();
global.Add(filter);
Assert.True(global.Count == 1 && global.First() == filter);
Assert.Contains(filter, global);
global.Remove(filter);
Assert.True(global.Count == 0);
global.Add(filter);
global.Clear();
Assert.True(global.Count == 0);
}
