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