123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112 |
- using System.Reflection;
- using Xunit.Abstractions;
- namespace Terminal.Gui.ViewsTests;
- public class ViewDisposalTest (ITestOutputHelper output)
- {
- #nullable enable
- private readonly Dictionary<Type, object? []?> _special_params = new ();
- #nullable restore
- [Fact]
- [AutoInitShutdown]
- public void TestViewsDisposeCorrectly ()
- {
- WeakReference reference = DoTest ();
- for (var i = 0; i < 10 && reference.IsAlive; i++)
- {
- GC.Collect ();
- GC.WaitForPendingFinalizers ();
- }
- #if DEBUG_IDISPOSABLE
- if (reference.IsAlive)
- {
- Assert.True (((View)reference.Target).WasDisposed);
- Assert.Fail ($"Some Views didnt get Garbage Collected: {((View)reference.Target).Subviews}");
- }
- #endif
- }
- private WeakReference DoTest ()
- {
- GetSpecialParams ();
- var container = new View () { Id = "container" };
- Toplevel top = new () { Id = "top" };
- List<Type> views = GetViews ();
- foreach (Type view in views)
- {
- View instance;
- //Create instance of view and add to container
- if (_special_params.TryGetValue (view, out object [] param))
- {
- instance = (View)Activator.CreateInstance (view, param);
- }
- else
- {
- instance = (View)Activator.CreateInstance (view);
- }
- Assert.NotNull (instance);
- instance.Id = $"{view.Name}";
- container.Add (instance);
- output.WriteLine ($"Added instance of {view}!");
- }
- top.Add (container);
- // make sure the application is doing to the views whatever its supposed to do to the views
- for (var i = 0; i < 100; i++)
- {
- Application.LayoutAndDraw ();
- }
- top.Remove (container);
- WeakReference reference = new (container, true);
- container.Dispose ();
- return reference;
- }
- private void GetSpecialParams ()
- {
- _special_params.Clear ();
- //special_params.Add (typeof (LineView), new object [] { Orientation.Horizontal });
- }
- // TODO: Consoldate this with same fn that's in AllViewsTester, ScenarioTests etc...
- /// <summary>Get all types derived from <see cref="View"/> using reflection</summary>
- /// <returns></returns>
- private List<Type> GetViews ()
- {
- List<Type> valid = new ();
- // Filter all types that can be instantiated, are public, arent generic, aren't the view type itself, but derive from view
- foreach (Type type in Assembly.GetAssembly (typeof (View))
- .GetTypes ()
- .Where (
- T =>
- { //body of anonymous check function
- return !T.IsAbstract
- && T.IsPublic
- && T.IsClass
- && T.IsAssignableTo (typeof (View))
- && !T.IsGenericType
- && !(T == typeof (View));
- }
- )) //end of body of anonymous check function
- { //body of the foreach loop
- output.WriteLine ($"Found Type {type.Name}");
- Assert.DoesNotContain (type, valid);
- Assert.True (type.IsAssignableTo (typeof (IDisposable))); // Just to be safe
- valid.Add (type);
- output.WriteLine (" -Added!");
- } //end body of foreach loop
- return valid;
- }
- }
|