avm2+tests: Implement Object.length and Object.init; add test for Object.length

core/src/avm2.rs

@@ -99,6 +99,7 @@ pub struct Avm2<'gc> {
     system_classes: Option<SystemClasses<'gc>>,
 
     pub public_namespace: Namespace<'gc>,
+    pub internal_namespace: Namespace<'gc>,
     pub as3_namespace: Namespace<'gc>,
     pub vector_public_namespace: Namespace<'gc>,
     pub vector_internal_namespace: Namespace<'gc>,
@@ -157,6 +158,7 @@ impl<'gc> Avm2<'gc> {
             system_classes: None,
 
             public_namespace: Namespace::package("", context),
+            internal_namespace: Namespace::internal("", context),
             as3_namespace: Namespace::package("http://adobe.com/AS3/2006/builtin", context),
             vector_public_namespace: Namespace::package("__AS3__.vec", context),
             vector_internal_namespace: Namespace::internal("__AS3__.vec", context),

core/src/avm2/globals/object.rs

@@ -271,6 +271,15 @@ pub fn set_property_is_enumerable<'gc>(
     Ok(Value::Undefined)
 }
 
+/// Undocumented `Object.init`, which is a no-op
+pub fn init<'gc>(
+    _activation: &mut Activation<'_, 'gc>,
+    _this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error<'gc>> {
+    Ok(Value::Undefined)
+}
+
 /// Construct `Object`'s class.
 pub fn create_class<'gc>(activation: &mut Activation<'_, 'gc>) -> GcCell<'gc, Class<'gc>> {
     let gc_context = activation.context.gc_context;
@@ -291,7 +300,7 @@ pub fn create_class<'gc>(activation: &mut Activation<'_, 'gc>) -> GcCell<'gc, Cl
     write.define_class_trait(Trait::from_const(
         QName::new(activation.avm2().public_namespace, "length"),
         Multiname::new(activation.avm2().public_namespace, "int"),
-        None,
+        Some(1.into()),
     ));
 
     // Fixed traits (in AS3 namespace)
@@ -306,5 +315,12 @@ pub fn create_class<'gc>(activation: &mut Activation<'_, 'gc>) -> GcCell<'gc, Cl
         AS3_INSTANCE_METHODS,
     );
 
+    const INTERNAL_INIT_METHOD: &[(&str, NativeMethodImpl)] = &[("init", init)];
+    write.define_builtin_class_methods(
+        gc_context,
+        activation.avm2().internal_namespace,
+        INTERNAL_INIT_METHOD,
+    );
+
     object_class
 }

tests/tests/swfs/avm2/static_length/output.txt

@@ -1,3 +1,4 @@
+Object.length is: 1
 RegExp.length is: 1
 String.length is: 1
 XMLList.length is: 1

tests/tests/swfs/avm2/static_length/test.as

@@ -8,6 +8,7 @@ package
 
 
 
+trace("Object.length is: " + Object.length);
 trace("RegExp.length is: " + RegExp.length);
 trace("String.length is: " + String.length);
 trace("XMLList.length is: " + XMLList.length);