public void OverridingSimpleMembersOfOpenGenericClass()
{
CustomClassEmitter classEmitter = new CustomClassEmitter(Scope, "OverridingSimpleMembersOfOpenGenericClass", typeof(GenericClassWithAllKindsOfMembers <>), Type.EmptyTypes,
TypeAttributes.Public | TypeAttributes.Class, false);
MethodInfo baseMethod = typeof(GenericClassWithAllKindsOfMembers <>).GetMethod("Method");
var overriddenMethod = classEmitter.CreateMethodOverride(baseMethod);
overriddenMethod.ImplementByBaseCall(baseMethod);
PropertyInfo baseProperty = typeof(GenericClassWithAllKindsOfMembers <>).GetProperty("Property");
CustomPropertyEmitter overriddenProperty = classEmitter.CreatePropertyOverride(baseProperty);
overriddenProperty.GetMethod = classEmitter.CreateMethodOverride(baseProperty.GetGetMethod());
overriddenProperty.GetMethod.ImplementByBaseCall(baseProperty.GetGetMethod());
EventInfo baseEvent = typeof(GenericClassWithAllKindsOfMembers <>).GetEvent("Event");
CustomEventEmitter overriddenEvent = classEmitter.CreateEventOverride(baseEvent);
overriddenEvent.AddMethod = classEmitter.CreateMethodOverride(baseEvent.GetAddMethod());
overriddenEvent.AddMethod.ImplementByBaseCall(baseEvent.GetAddMethod());
overriddenEvent.RemoveMethod = classEmitter.CreateMethodOverride(baseEvent.GetRemoveMethod());
overriddenEvent.RemoveMethod.ImplementByBaseCall(baseEvent.GetRemoveMethod());
Type builtType = classEmitter.BuildType();
GenericClassWithAllKindsOfMembers <int> instance =
(GenericClassWithAllKindsOfMembers <int>)Activator.CreateInstance(builtType.MakeGenericType(typeof(int)));
instance.Method(5);
Assert.That(instance.Property, Is.EqualTo(0));
instance.Event += delegate { return(0); };
instance.Event -= delegate { return(0); };
}
public void PropertyNamePreservedOnOverride()
{
var classEmitter = new CustomClassEmitter(Scope, "PropertyNamePreservedOnOverride", typeof(ClassWithAllKindsOfMembers), Type.EmptyTypes,
TypeAttributes.Public | TypeAttributes.Class, false);
CustomPropertyEmitter property =
classEmitter.CreatePropertyOverride(typeof(ClassWithAllKindsOfMembers).GetProperty("Property", _declaredInstanceBindingFlags));
Assert.That(property.PropertyBuilder.Name, Is.EqualTo("Property"));
classEmitter.BuildType();
}
public void CreateIndexedPropertyOverride()
{
var classEmitter = new CustomClassEmitter(Scope, "CreateIndexedPropertyOverride", typeof(ClassWithAllKindsOfMembers), Type.EmptyTypes,
TypeAttributes.Public | TypeAttributes.Class, false);
PropertyInfo baseProperty = typeof(ClassWithAllKindsOfMembers).GetProperty("Item", _declaredInstanceBindingFlags);
CustomPropertyEmitter property = classEmitter.CreatePropertyOverride(baseProperty);
property.CreateGetMethod().ImplementByBaseCall(baseProperty.GetGetMethod());
property.CreateSetMethod().ImplementByBaseCall(baseProperty.GetSetMethod());
Type builtType = classEmitter.BuildType();
var instance = (ClassWithAllKindsOfMembers)Activator.CreateInstance(builtType);
Assert.That(instance[17], Is.EqualTo("17"));
instance[18] = "foo";
}
public void CreatePropertyOverride()
{
var classEmitter = new CustomClassEmitter(Scope, "CreatePropertyOverride", typeof(ClassWithAllKindsOfMembers), Type.EmptyTypes,
TypeAttributes.Public | TypeAttributes.Class, false);
CustomPropertyEmitter property =
classEmitter.CreatePropertyOverride(typeof(ClassWithAllKindsOfMembers).GetProperty("Property", _declaredInstanceBindingFlags));
Assert.That(property.GetMethod, Is.Null);
Assert.That(property.SetMethod, Is.Null);
// only override getter, not setter
property.GetMethod =
classEmitter.CreateMethodOverride(typeof(ClassWithAllKindsOfMembers).GetMethod("get_Property", _declaredInstanceBindingFlags));
property.GetMethod.AddStatement(new ReturnStatement(new ConstReference(17)));
Type builtType = classEmitter.BuildType();
var instance = (ClassWithAllKindsOfMembers)Activator.CreateInstance(builtType);
Assert.That(instance.Property, Is.EqualTo(17));
instance.Property = 7; // inherited, not overridden
}
