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//
// DynamicMethodTest.cs - NUnit Test Cases for the DynamicMethod class
//
// Gert Driesen (drieseng@users.sourceforge.net)
//
// (C) 2006 Novell
#if NET_2_0
using System;
using System.Reflection;
using System.Reflection.Emit;
using NUnit.Framework;
namespace MonoTests.System.Reflection.Emit
{
[TestFixture]
public class DynamicMethodTest
{
private delegate int HelloInvoker (string msg);
[Test]
public void Constructor1_Name_Null ()
{
try {
new DynamicMethod (null,
typeof (void),
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module);
Assert.Fail ("#1");
} catch (ArgumentNullException ex) {
Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
Assert.AreEqual ("name", ex.ParamName, "#3");
Assert.IsNull (ex.InnerException, "#4");
}
}
[Test]
public void Constructor2_Name_Null ()
{
try {
new DynamicMethod (null,
typeof (void),
new Type[] { typeof (string) },
typeof (DynamicMethodTest));
Assert.Fail ("#1");
} catch (ArgumentNullException ex) {
Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
Assert.AreEqual ("name", ex.ParamName, "#3");
Assert.IsNull (ex.InnerException, "#4");
}
}
[Test]
public void Constructor3_Name_Null ()
{
try {
new DynamicMethod (null,
typeof (void),
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module, true);
Assert.Fail ("#1");
} catch (ArgumentNullException ex) {
Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
Assert.AreEqual ("name", ex.ParamName, "#3");
Assert.IsNull (ex.InnerException, "#4");
}
}
[Test]
public void Constructor4_Name_Null ()
{
try {
new DynamicMethod (null,
typeof (void),
new Type[] { typeof (string) },
typeof (DynamicMethodTest), true);
Assert.Fail ("#1");
} catch (ArgumentNullException ex) {
Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
Assert.AreEqual ("name", ex.ParamName, "#3");
Assert.IsNull (ex.InnerException, "#4");
}
}
[Test]
public void Constructor5_Name_Null ()
{
try {
new DynamicMethod (null,
MethodAttributes.Public | MethodAttributes.Static,
CallingConventions.Standard,
typeof (void),
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module, true);
Assert.Fail ("#1");
} catch (ArgumentNullException ex) {
Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
Assert.AreEqual ("name", ex.ParamName, "#3");
Assert.IsNull (ex.InnerException, "#4");
}
}
[Test]
public void Constructor6_Name_Null ()
{
try {
new DynamicMethod (null,
MethodAttributes.Public | MethodAttributes.Static,
CallingConventions.Standard,
typeof (void),
new Type[] { typeof (string) },
typeof (DynamicMethodTest), true);
Assert.Fail ("#1");
} catch (ArgumentNullException ex) {
Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
Assert.AreEqual ("name", ex.ParamName, "#3");
Assert.IsNull (ex.InnerException, "#4");
}
}
[Test] // bug #78253
public void DynamicMethodReference ()
{
DynamicMethod hello = new DynamicMethod ("Hello",
typeof (int),
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module);
Assert.IsNull (hello.DeclaringType, "#1");
DynamicMethod write = new DynamicMethod ("Write",
typeof (int),
new Type[] { typeof (string) },
typeof (DynamicMethodTest));
Assert.IsNull (hello.DeclaringType, "#2");
MethodInfo invokeWrite = write.GetBaseDefinition ();
ILGenerator helloIL = hello.GetILGenerator ();
helloIL.Emit (OpCodes.Ldarg_0);
helloIL.EmitCall (OpCodes.Call, invokeWrite, null);
helloIL.Emit (OpCodes.Ret);
ILGenerator writeIL = write.GetILGenerator ();
writeIL.Emit (OpCodes.Ldc_I4_2);
writeIL.Emit (OpCodes.Ret);
HelloInvoker hi =
(HelloInvoker) hello.CreateDelegate (typeof (HelloInvoker));
int ret = hi ("Hello, World!");
Assert.AreEqual (2, ret, "#3");
object[] invokeArgs = { "Hello, World!" };
object objRet = hello.Invoke (null, invokeArgs);
Assert.AreEqual (2, objRet, "#4");
}
[Test]
public void EmptyMethodBody ()
{
DynamicMethod hello = new DynamicMethod ("Hello",
typeof (int),
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module);
object[] invokeArgs = { "Hello, World!" };
// no IL generator
try {
hello.Invoke (null, invokeArgs);
Assert.Fail ("#1");
} catch (InvalidOperationException) {
}
// empty method body
hello.GetILGenerator ();
try {
hello.Invoke (null, invokeArgs);
Assert.Fail ("#2");
} catch (InvalidOperationException) {
}
}
private delegate string ReturnString (string msg);
private delegate void DoNothing (string msg);
private static string private_method (string s) {
return s;
}
[Test]
public void SkipVisibility ()
{
DynamicMethod hello = new DynamicMethod ("Hello",
typeof (string),
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module, true);
ILGenerator helloIL = hello.GetILGenerator ();
helloIL.Emit (OpCodes.Ldarg_0);
helloIL.EmitCall (OpCodes.Call, typeof (DynamicMethodTest).GetMethod ("private_method", BindingFlags.Static|BindingFlags.NonPublic), null);
helloIL.Emit (OpCodes.Ret);
ReturnString del =
(ReturnString) hello.CreateDelegate (typeof (ReturnString));
Assert.AreEqual ("ABCD", del ("ABCD"));
}
[Test]
public void ReturnType_Null ()
{
DynamicMethod hello = new DynamicMethod ("Hello",
null,
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module, true);
Assert.AreEqual (typeof (void), hello.ReturnType, "#1");
ILGenerator helloIL = hello.GetILGenerator ();
helloIL.Emit (OpCodes.Ret);
DoNothing dn = (DoNothing) hello.CreateDelegate (typeof (DoNothing));
dn ("whatever");
object[] invokeArgs = { "Hello, World!" };
object objRet = hello.Invoke (null, invokeArgs);
Assert.IsNull (objRet, "#2");
}
[Test]
public void Name_Empty ()
{
DynamicMethod hello = new DynamicMethod (string.Empty,
typeof (int),
new Type[] { typeof (string) },
typeof (DynamicMethodTest).Module);
Assert.AreEqual (string.Empty, hello.Name, "#1");
DynamicMethod write = new DynamicMethod ("Write",
typeof (int),
new Type[] { typeof (string) },
typeof (DynamicMethodTest));
MethodInfo invokeWrite = write.GetBaseDefinition ();
ILGenerator helloIL = hello.GetILGenerator ();
helloIL.Emit (OpCodes.Ldarg_0);
helloIL.EmitCall (OpCodes.Call, invokeWrite, null);
helloIL.Emit (OpCodes.Ret);
ILGenerator writeIL = write.GetILGenerator ();
writeIL.Emit (OpCodes.Ldc_I4_2);
writeIL.Emit (OpCodes.Ret);
HelloInvoker hi =
(HelloInvoker) hello.CreateDelegate (typeof (HelloInvoker));
int ret = hi ("Hello, World!");
Assert.AreEqual (2, ret, "#2");
object[] invokeArgs = { "Hello, World!" };
object objRet = hello.Invoke (null, invokeArgs);
Assert.AreEqual (2, objRet, "#3");
}
[Test]
public void Circular_Refs () {
DynamicMethod m1 = new DynamicMethod("f1", typeof(int), new Type[] { typeof (int) },
typeof(object));
DynamicMethod m2 = new DynamicMethod("f2", typeof(int), new Type[] { typeof (int) },
typeof(object));
ILGenerator il1 = m1.GetILGenerator();
ILGenerator il2 = m2.GetILGenerator();
Label l = il1.DefineLabel ();
//il1.EmitWriteLine ("f1");
il1.Emit (OpCodes.Ldarg_0);
il1.Emit (OpCodes.Ldc_I4_0);
il1.Emit (OpCodes.Bne_Un, l);
il1.Emit (OpCodes.Ldarg_0);
il1.Emit (OpCodes.Ret);
il1.MarkLabel (l);
il1.Emit (OpCodes.Ldarg_0);
il1.Emit (OpCodes.Ldc_I4_1);
il1.Emit (OpCodes.Sub);
il1.Emit (OpCodes.Call, m2);
il1.Emit (OpCodes.Ret);
//il2.EmitWriteLine("f2");
il2.Emit(OpCodes.Ldarg_0);
il2.Emit(OpCodes.Call, m1);
il2.Emit(OpCodes.Ret);
m1.Invoke(null, new object[] { 5 });
}
class Host {
static string Field = "foo";
}
[Test]
[Category ("NotDotNet")] // https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=297416
public void TestOwnerMemberAccess ()
{
DynamicMethod method = new DynamicMethod ("GetField",
typeof (string), new Type [0], typeof (Host));
ILGenerator il = method.GetILGenerator ();
il.Emit (OpCodes.Ldsfld, typeof (Host).GetField (
"Field", BindingFlags.Static | BindingFlags.NonPublic));
il.Emit (OpCodes.Ret);
string ret = (string) method.Invoke (null, new object [] {});
Assert.AreEqual ("foo", ret, "#1");
}
[Test]
public void AnonHosted ()
{
DynamicMethod hello = new DynamicMethod ("Hello",
typeof (int),
new Type[] { typeof (string) });
ILGenerator helloIL = hello.GetILGenerator ();
helloIL.Emit (OpCodes.Ldc_I4_2);
helloIL.Emit (OpCodes.Ret);
HelloInvoker hi =
(HelloInvoker) hello.CreateDelegate (typeof (HelloInvoker));
int ret = hi ("Hello, World!");
Assert.AreEqual (2, ret);
object[] invokeArgs = { "Hello, World!" };
object objRet = hello.Invoke (null, invokeArgs);
Assert.AreEqual (2, objRet);
}
public delegate int IntInvoker();
public class Foo<T> {
public virtual int Test () { return 99; }
}
[Test]
public void ConstrainedPrexixDoesntCrash () //bug #529238
{
Type foo = typeof (Foo<int>);
DynamicMethod dm = new DynamicMethod ("Hello", typeof (int), null);
ILGenerator ilgen = dm.GetILGenerator ();
ilgen.DeclareLocal (foo);
ilgen.Emit (OpCodes.Newobj, foo.GetConstructor (new Type [0]));
ilgen.Emit (OpCodes.Stloc_0);
ilgen.Emit (OpCodes.Ldloca_S, 0);
ilgen.Emit (OpCodes.Constrained, foo);
ilgen.Emit (OpCodes.Callvirt, foo.GetMethod ("Test"));
ilgen.Emit (OpCodes.Ret);
IntInvoker hi = (IntInvoker) dm.CreateDelegate (typeof (IntInvoker));
Assert.AreEqual (99, hi (), "#1");
}
}
}
#endif
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