public void AddEventHandler_ComObjectWithMultipleComEventInterfaceAttribute_ThrowsAmbiguousMatchException()
{
// C# doesn't let us apply multiple ComEventInterface values, so RefEmit is necessary.
AssemblyBuilder assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName("assembly"), AssemblyBuilderAccess.Run);
ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("module");
TypeBuilder typeBuilder = moduleBuilder.DefineType("name", TypeAttributes.Interface | TypeAttributes.Abstract);
typeBuilder.SetCustomAttribute(new CustomAttributeBuilder(typeof(ComEventInterfaceAttribute).GetConstructors()[0], new object[] { typeof(int), typeof(string) }));
typeBuilder.SetCustomAttribute(new CustomAttributeBuilder(typeof(ComEventInterfaceAttribute).GetConstructors()[0], new object[] { typeof(string), typeof(string) }));
MethodBuilder addMethod = typeBuilder.DefineMethod("add_Event", MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.Abstract, typeof(void), new Type[] { typeof(EventHandler) });
addMethod.GetILGenerator().Emit(OpCodes.Ret);
EventBuilder eventBuilder = typeBuilder.DefineEvent("Event", EventAttributes.None, typeof(EventHandler));
eventBuilder.SetAddOnMethod(addMethod);
var attribute = new ComAwareEventInfo(typeBuilder.CreateType(), "Event");
var target = new ComImportObject();
Delegate handler = new EventHandler(EventHandler);
Assert.Throws <AmbiguousMatchException>(() => attribute.AddEventHandler(target, handler));
Assert.Throws <AmbiguousMatchException>(() => attribute.RemoveEventHandler(target, handler));
}
public void AddEventHandler_NoSuchSourceTypeEventInterface_ThrowsArgumentNullException()
{
var attribute = new ComAwareEventInfo(typeof(NoSuchSourceType), nameof(NoSuchSourceType.Event));
var target = new ComImportObject();
Delegate handler = new EventHandler(EventHandler);
AssertExtensions.Throws <ArgumentNullException>("element", () => attribute.AddEventHandler(target, handler));
AssertExtensions.Throws <ArgumentNullException>("element", () => attribute.RemoveEventHandler(target, handler));
}
public void AddEventHandler_NullSourceTypeEventInterface_ThrowsNullReferenceException()
{
var attribute = new ComAwareEventInfo(typeof(NullSourceType), nameof(NullSourceType.Event));
var target = new ComImportObject();
Delegate handler = new EventHandler(EventHandler);
Assert.Throws <NullReferenceException>(() => attribute.AddEventHandler(target, handler));
Assert.Throws <NullReferenceException>(() => attribute.RemoveEventHandler(target, handler));
}
public void AddEventHandler_TargetNotIConnectionIConnectionPointContainer_ThrowsInvalidCastException()
{
var attribute = new ComAwareEventInfo(typeof(DispAttributeInterface), nameof(DispAttributeInterface.Event));
var target = new ComImportObject();
Delegate handler = new EventHandler(EventHandler);
Assert.Throws <InvalidCastException>(() => attribute.AddEventHandler(target, handler));
attribute.RemoveEventHandler(target, handler);
}
public void AddEventHandler_ComObjectWithoutComEventInterfaceAttribute_ThrowsInvalidOperationException()
{
var attribute = new ComAwareEventInfo(typeof(NonComObject), nameof(NonComObject.Event));
var target = new ComImportObject();
Delegate handler = new EventHandler(EventHandler);
Assert.Throws <InvalidOperationException>(() => attribute.AddEventHandler(target, handler));
Assert.Throws <InvalidOperationException>(() => attribute.RemoveEventHandler(target, handler));
}
public void AddEventHandler_DispIdAttribute_ThrowsPlatformNotSupportedException()
{
var attribute = new ComAwareEventInfo(typeof(DispAttributeInterface), nameof(DispAttributeInterface.Event));
var target = new ComObject();
Delegate handler = new EventHandler(EventHandler);
Assert.Throws <PlatformNotSupportedException>(() => attribute.AddEventHandler(target, handler));
Assert.Throws <PlatformNotSupportedException>(() => attribute.RemoveEventHandler(target, handler));
}
public void AddEventHandler_NoDispIdAttribute_ThrowsInvalidOperationException()
{
var attribute = new ComAwareEventInfo(typeof(NoDispAttributeInterface), nameof(NoDispAttributeInterface.Event));
var target = new ComObject();
Delegate handler = new EventHandler(EventHandler);
Assert.Throws <InvalidOperationException>(() => attribute.AddEventHandler(target, handler));
Assert.Throws <InvalidOperationException>(() => attribute.RemoveEventHandler(target, handler));
}
public void Methods_NoSuchEvent_ThrowsNullReferenceException()
{
var attribute = new ComAwareEventInfo(typeof(NonComObject), string.Empty);
Assert.Throws <NullReferenceException>(() => attribute.AddEventHandler(new object(), new EventHandler(EventHandler)));
Assert.Throws <NullReferenceException>(() => attribute.RemoveEventHandler(new object(), new EventHandler(EventHandler)));
Assert.Throws <NullReferenceException>(() => attribute.GetAddMethod(false));
Assert.Throws <NullReferenceException>(() => attribute.GetRaiseMethod(false));
Assert.Throws <NullReferenceException>(() => attribute.GetRemoveMethod(false));
Assert.Throws <NullReferenceException>(() => attribute.GetCustomAttributes(typeof(ComVisibleAttribute), false));
Assert.Throws <NullReferenceException>(() => attribute.GetCustomAttributes(false));
Assert.Throws <NullReferenceException>(() => attribute.IsDefined(typeof(ComVisibleAttribute), false));
}
public void AddEventHandler_NonCom_Success()
{
var attribute = new ComAwareEventInfo(typeof(NonComObject), nameof(NonComObject.Event));
var target = new NonComObject();
Delegate handler = new EventHandler(EventHandler);
attribute.AddEventHandler(target, handler);
target.Raise(1);
Assert.True(CalledEventHandler);
CalledEventHandler = false;
attribute.RemoveEventHandler(target, handler);
Assert.False(CalledEventHandler);
}
// The ComAwareEventInfo is used by the compiler when PIAs
// containing COM Events are embedded.
static void Validate_COMEventViaComAwareEventInfo()
{
Console.WriteLine($"{nameof(Validate_COMEventViaComAwareEventInfo)}...");
var eventTesting = (EventTesting) new EventTestingClass();
// Verify event handler subscription
// Add event
var comAwareEventInfo = new ComAwareEventInfo(typeof(TestingEvents_Event), nameof(TestingEvents_Event.OnEvent));
var handler = new TestingEvents_OnEventEventHandler(OnEventEventHandler);
comAwareEventInfo.AddEventHandler(eventTesting, handler);
bool eventFired = false;
string message = string.Empty;
eventTesting.FireEvent();
Assert.IsTrue(eventFired, "Event didn't fire");
Assert.AreEqual(nameof(EventTesting.FireEvent), message, "Event message is incorrect");
comAwareEventInfo.RemoveEventHandler(eventTesting, handler);
// Verify event handler removed
eventFired = false;
eventTesting.FireEvent();
Assert.IsFalse(eventFired, "Event shouldn't fire");
void OnEventEventHandler(string msg)
{
eventFired = true;
message = msg;
}
}
public void AddEventHandler_NullTarget_ThrowsArgumentNullException()
{
var attribute = new ComAwareEventInfo(typeof(NonComObject), nameof(NonComObject.Event));
AssertExtensions.Throws <ArgumentNullException>("o", () => attribute.AddEventHandler(null, new EventHandler(EventHandler)));
}