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//
// System.Runtime.InteropServices.GCHandle Test Cases
//
// Authors:
// Paolo Molaro (lupus@ximian.com)
//
// Copyright (C) 2005, 2009 Novell, Inc (http://www.novell.com)
//
using NUnit.Framework;
using System;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Globalization;
namespace MonoTests.System.Runtime.InteropServices
{
[TestFixture]
public class GCHandleTest
{
// Expected warning, the tests that reference this handle are testing for the default values of the object
#pragma warning disable 649
static GCHandle handle;
#pragma warning restore 649
[Test]
public void DefaultZeroValue_Allocated ()
{
Assert.IsFalse (handle.IsAllocated, "IsAllocated");
}
[Test]
[ExpectedException (typeof (InvalidOperationException))]
public void DefaultZeroValue_Target ()
{
Assert.IsNull (handle.Target, "Target");
}
[Test]
public void AllocNull ()
{
IntPtr ptr = (IntPtr) GCHandle.Alloc (null);
Assert.IsFalse (ptr == IntPtr.Zero, "ptr");
GCHandle gch = (GCHandle) ptr;
Assert.IsTrue (gch.IsAllocated, "IsAllocated");
Assert.IsNull (gch.Target, "Target");
}
[Test]
public void AllocNullWeakTrack ()
{
GCHandle gch = GCHandle.Alloc (null, GCHandleType.WeakTrackResurrection);
Assert.IsTrue (gch.IsAllocated, "IsAllocated");
Assert.IsNull (gch.Target, "Target");
}
[Test]
[ExpectedException (typeof (InvalidOperationException))]
public void AddrOfPinnedObjectNormal ()
{
GCHandle handle = GCHandle.Alloc (new Object (), GCHandleType.Normal);
try {
IntPtr ptr = handle.AddrOfPinnedObject();
}
finally {
handle.Free();
}
}
[Test]
[ExpectedException (typeof (InvalidOperationException))]
public void AddrOfPinnedObjectWeak ()
{
GCHandle handle = GCHandle.Alloc (new Object (), GCHandleType.Weak);
try {
IntPtr ptr = handle.AddrOfPinnedObject();
}
finally {
handle.Free();
}
}
[Test]
[ExpectedException (typeof (InvalidOperationException))]
public void AddrOfPinnedObjectWeakTrackResurrection ()
{
GCHandle handle = GCHandle.Alloc (new Object (), GCHandleType.WeakTrackResurrection);
try {
IntPtr ptr = handle.AddrOfPinnedObject();
}
finally {
handle.Free();
}
}
[Test]
public void AddrOfPinnedObjectNull ()
{
GCHandle handle = GCHandle.Alloc (null, GCHandleType.Pinned);
try {
IntPtr ptr = handle.AddrOfPinnedObject();
Assert.AreEqual (new IntPtr (0), ptr);
}
finally {
handle.Free();
}
}
[Test]
[Ignore ("throw non-catchable ExecutionEngineException")]
[ExpectedException (typeof (ExecutionEngineException))]
public void AllocMinusOne ()
{
// -1 is a special value used by the mono runtime
// looks like it's special too in MS CLR (since it will crash)
GCHandle.Alloc (null, (GCHandleType) (-1));
}
[Test]
public void AllocInvalidType ()
{
GCHandle gch = GCHandle.Alloc (null, (GCHandleType) Int32.MinValue);
try {
Assert.IsTrue (gch.IsAllocated, "IsAllocated");
Assert.IsNull (gch.Target, "Target");
}
finally {
gch.Free ();
}
}
#if !MONOTOUCH && !MOBILE_STATIC
[Test]
[Category("MobileNotWorking")] // SIGSEGV, probably on AppDomain.Unload
public void WeakHandleWorksOnNonRootDomain ()
{
//Console.WriteLine("current app domain: " + AppDomain.CurrentDomain.Id);
AppDomain domain = AppDomain.CreateDomain("testdomain");
Assembly ea = Assembly.GetExecutingAssembly ();
domain.CreateInstanceFrom (ea.CodeBase,
typeof (AssemblyResolveHandler).FullName,
false,
BindingFlags.Public | BindingFlags.Instance,
null,
new object [] { ea.Location, ea.FullName },
CultureInfo.InvariantCulture,
null,
null);
var testerType = typeof (CrossDomainGCHandleRunner);
var r = (CrossDomainGCHandleRunner)domain.CreateInstanceAndUnwrap (
testerType.Assembly.FullName, testerType.FullName, false,
BindingFlags.Public | BindingFlags.Instance, null, new object [0],
CultureInfo.InvariantCulture, new object [0], null);
Assert.IsTrue (r.RunTest (), "#1");
AppDomain.Unload (domain);
}
public class CrossDomainGCHandleRunner : MarshalByRefObject {
public bool RunTest () {
object o = new object();
GCHandle gcHandle = GCHandle.Alloc (o, GCHandleType.Weak);
IntPtr intPtr = (IntPtr)gcHandle;
try {
object target = GCHandle.FromIntPtr(intPtr).Target;
return true;
} catch (Exception) {}
return false;
}
}
[Serializable ()]
class AssemblyResolveHandler
{
public AssemblyResolveHandler (string assemblyFile, string assemblyName)
{
_assemblyFile = assemblyFile;
_assemblyName = assemblyName;
AppDomain.CurrentDomain.AssemblyResolve +=
new ResolveEventHandler (ResolveAssembly);
}
private Assembly ResolveAssembly (object sender, ResolveEventArgs args)
{
if (args.Name == _assemblyName)
return Assembly.LoadFrom (_assemblyFile);
return null;
}
private readonly string _assemblyFile;
private readonly string _assemblyName;
}
#endif
}
}
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