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//
// WeakReferenceTest.cs - NUnit Test Cases for WeakReference
//
// Author:
// Sebastien Pouliot (sebastien@ximian.com)
//
// Copyright (C) 2009 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.IO;
using NUnit.Framework;
namespace MonoTests.System {
[TestFixture]
public class WeakReferenceTest {
[Test]
public void WeakReference_Object_Null ()
{
WeakReference wr = new WeakReference (null);
Assert.IsFalse (wr.IsAlive, "IsAlive");
Assert.IsNull (wr.Target, "Target");
Assert.IsFalse (wr.TrackResurrection, "TrackResurrection");
}
[Test]
public void WeakReference_Object_Null_TrackResurrection_True ()
{
WeakReference wr = new WeakReference (null, true);
Assert.IsFalse (wr.IsAlive, "IsAlive");
Assert.IsNull (wr.Target, "Target");
Assert.IsTrue (wr.TrackResurrection, "TrackResurrection");
}
[Test]
public void WeakReference_Object_Null_TrackResurrection_False ()
{
WeakReference wr = new WeakReference (null, false);
Assert.IsFalse (wr.IsAlive, "IsAlive");
Assert.IsNull (wr.Target, "Target");
Assert.IsFalse (wr.TrackResurrection, "TrackResurrection");
}
[Test]
public void WeakReference_Object ()
{
using (Stream s = Stream.Null) {
WeakReference wr = new WeakReference (s);
Assert.IsTrue (wr.IsAlive, "IsAlive");
Assert.AreSame (s, wr.Target, "Target");
Assert.IsFalse (wr.TrackResurrection, "TrackResurrection");
}
}
[Test]
public void WeakReference_Object_TrackResurrection_True ()
{
using (Stream s = Stream.Null) {
WeakReference wr = new WeakReference (s, true);
Assert.IsTrue (wr.IsAlive, "IsAlive");
Assert.AreSame (s, wr.Target, "Target");
Assert.IsTrue (wr.TrackResurrection, "TrackResurrection");
}
}
[Test]
public void WeakReference_Object_TrackResurrection_False ()
{
using (Stream s = Stream.Null) {
WeakReference wr = new WeakReference (s, false);
Assert.IsTrue (wr.IsAlive, "IsAlive");
Assert.AreSame (s, wr.Target, "Target");
Assert.IsFalse (wr.TrackResurrection, "TrackResurrection");
}
}
class Foo {
WeakReference wr;
public static bool failed;
public Foo () {
wr = new WeakReference (new object ());
}
~Foo () {
try {
var b = wr.IsAlive;
} catch (Exception) {
failed = true;
}
}
}
[Test]
public void WeakReference_IsAlive_Finalized ()
{
var f = new Foo ();
f = null;
GC.Collect ();
GC.WaitForPendingFinalizers ();
Assert.IsFalse (Foo.failed);
}
#if NET_4_5
[Test]
public void WeakReferenceT_TryGetTarget_NullTarget ()
{
var r = new WeakReference <object> (null);
object obj;
Assert.IsFalse (r.TryGetTarget (out obj), "#1");
}
#endif
}
}
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