ruffle/core/src/avm1/script_object.rs

use crate::avm1::function::{Executable, FunctionObject, NativeFunction};
use crate::avm1::property::{Attribute, Property};
use crate::avm1::return_value::ReturnValue;
use crate::avm1::{Avm1, Error, Object, ObjectPtr, TObject, UpdateContext, Value};
use crate::property_map::{Entry, PropertyMap};
use core::fmt;
use enumset::EnumSet;
use gc_arena::{Collect, GcCell, MutationContext};

pub const TYPE_OF_OBJECT: &str = "object";

#[derive(Debug, Clone, Collect)]
#[collect(no_drop)]
pub enum ArrayStorage<'gc> {
    Vector(Vec<Value<'gc>>),
    Properties { length: usize },
}

#[derive(Debug, Copy, Clone, Collect)]
#[collect(no_drop)]
pub struct ScriptObject<'gc>(GcCell<'gc, ScriptObjectData<'gc>>);

pub struct ScriptObjectData<'gc> {
    prototype: Option<Object<'gc>>,
    values: PropertyMap<Property<'gc>>,
    interfaces: Vec<Object<'gc>>,
    type_of: &'static str,
    array: ArrayStorage<'gc>,
}

unsafe impl<'gc> Collect for ScriptObjectData<'gc> {
    fn trace(&self, cc: gc_arena::CollectionContext) {
        self.prototype.trace(cc);
        self.values.trace(cc);
        self.array.trace(cc);
        self.interfaces.trace(cc);
    }
}

impl fmt::Debug for ScriptObjectData<'_> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.debug_struct("Object")
            .field("prototype", &self.prototype)
            .field("values", &self.values)
            .field("array", &self.array)
            .finish()
    }
}

impl<'gc> ScriptObject<'gc> {
    pub fn object(
        gc_context: MutationContext<'gc, '_>,
        proto: Option<Object<'gc>>,
    ) -> ScriptObject<'gc> {
        ScriptObject(GcCell::allocate(
            gc_context,
            ScriptObjectData {
                prototype: proto,
                type_of: TYPE_OF_OBJECT,
                values: PropertyMap::new(),
                array: ArrayStorage::Properties { length: 0 },
                interfaces: vec![],
            },
        ))
    }

    pub fn array(
        gc_context: MutationContext<'gc, '_>,
        proto: Option<Object<'gc>>,
    ) -> ScriptObject<'gc> {
        let object = ScriptObject(GcCell::allocate(
            gc_context,
            ScriptObjectData {
                prototype: proto,
                type_of: TYPE_OF_OBJECT,
                values: PropertyMap::new(),
                array: ArrayStorage::Vector(Vec::new()),
                interfaces: vec![],
            },
        ));
        object.sync_native_property("length", gc_context, Some(0.into()));
        object
    }

    /// Constructs and allocates an empty but normal object in one go.
    pub fn object_cell(
        gc_context: MutationContext<'gc, '_>,
        proto: Option<Object<'gc>>,
    ) -> Object<'gc> {
        ScriptObject(GcCell::allocate(
            gc_context,
            ScriptObjectData {
                prototype: proto,
                type_of: TYPE_OF_OBJECT,
                values: PropertyMap::new(),
                array: ArrayStorage::Properties { length: 0 },
                interfaces: vec![],
            },
        ))
        .into()
    }

    /// Constructs an object with no values, not even builtins.
    ///
    /// Intended for constructing scope chains, since they exclusively use the
    /// object values, but can't just have a hashmap because of `with` and
    /// friends.
    pub fn bare_object(gc_context: MutationContext<'gc, '_>) -> Self {
        ScriptObject(GcCell::allocate(
            gc_context,
            ScriptObjectData {
                prototype: None,
                type_of: TYPE_OF_OBJECT,
                values: PropertyMap::new(),
                array: ArrayStorage::Properties { length: 0 },
                interfaces: vec![],
            },
        ))
    }

    /// Declare a native function on the current object.
    ///
    /// This is intended for use with defining host object prototypes. Notably,
    /// this creates a function object without an explicit `prototype`, which
    /// is only possible when defining host functions. User-defined functions
    /// always get a fresh explicit prototype, so you should never force set a
    /// user-defined function.
    pub fn force_set_function<A>(
        &mut self,
        name: &str,
        function: NativeFunction<'gc>,
        gc_context: MutationContext<'gc, '_>,
        attributes: A,
        fn_proto: Option<Object<'gc>>,
    ) where
        A: Into<EnumSet<Attribute>>,
    {
        self.define_value(
            gc_context,
            name,
            Value::Object(FunctionObject::function(
                gc_context, function, fn_proto, None,
            )),
            attributes.into(),
        )
    }

    pub fn set_type_of(&mut self, gc_context: MutationContext<'gc, '_>, type_of: &'static str) {
        self.0.write(gc_context).type_of = type_of;
    }

    #[allow(clippy::trivially_copy_pass_by_ref)]
    pub fn sync_native_property(
        &self,
        name: &str,
        gc_context: MutationContext<'gc, '_>,
        native_value: Option<Value<'gc>>,
    ) {
        match self
            .0
            .write(gc_context)
            .values
            .entry(name.to_string(), false)
        {
            Entry::Occupied(mut entry) => {
                if let Property::Stored { value, .. } = entry.get_mut() {
                    match native_value {
                        None => {
                            entry.remove_entry();
                        }
                        Some(native_value) => {
                            *value = native_value;
                        }
                    }
                }
            }
            Entry::Vacant(entry) => {
                if let Some(native_value) = native_value {
                    entry.insert(Property::Stored {
                        value: native_value,
                        attributes: Attribute::DontEnum.into(),
                    });
                }
            }
        }
    }

    #[allow(clippy::trivially_copy_pass_by_ref)]
    pub(crate) fn internal_set(
        &self,
        name: &str,
        value: Value<'gc>,
        avm: &mut Avm1<'gc>,
        context: &mut UpdateContext<'_, 'gc, '_>,
        this: Object<'gc>,
        base_proto: Option<Object<'gc>>,
    ) -> Result<(), Error> {
        if name == "__proto__" {
            self.0.write(context.gc_context).prototype = value.as_object().ok();
        } else if let Ok(index) = name.parse::<usize>() {
            self.set_array_element(index, value.to_owned(), context.gc_context);
        } else {
            if name == "length" {
                let length = value
                    .as_number(avm, context)
                    .map(|v| v.abs() as i32)
                    .unwrap_or(0);
                if length > 0 {
                    self.set_length(context.gc_context, length as usize);
                } else {
                    self.set_length(context.gc_context, 0);
                }
            }

            //Before actually inserting a new property, we need to crawl the
            //prototype chain for virtual setters, which kind of break how
            //ECMAScript `[[Set]]` is supposed to work...
            let is_vacant = !self
                .0
                .read()
                .values
                .contains_key(name, avm.is_case_sensitive());
            let mut rval = None;

            if is_vacant {
                let mut proto: Option<Object<'gc>> = Some((*self).into());
                while let Some(this_proto) = proto {
                    if this_proto.has_own_virtual(avm, context, name)
                        && this_proto.is_property_overwritable(avm, name)
                    {
                        break;
                    }

                    proto = this_proto.proto();
                }

                if let Some(this_proto) = proto {
                    rval = Some(this_proto.call_setter(
                        name,
                        value.clone(),
                        avm,
                        context,
                        (*self).into(),
                    )?);
                }
            }

            //No `rval` signals we didn't call a virtual setter above. Normally,
            //we'd resolve and return up there, but we have borrows that need
            //to end before we can do so.
            if rval.is_none() {
                rval = match self
                    .0
                    .write(context.gc_context)
                    .values
                    .entry(name.to_owned(), avm.is_case_sensitive())
                {
                    Entry::Occupied(mut entry) => {
                        Some(entry.get_mut().set(avm, context, this, base_proto, value)?)
                    }
                    Entry::Vacant(entry) => {
                        entry.insert(Property::Stored {
                            value,
                            attributes: Default::default(),
                        });

                        None
                    }
                };
            }

            if let Some(rval) = rval {
                rval.resolve(avm, context)?;
            }
        }

        Ok(())
    }
}

impl<'gc> TObject<'gc> for ScriptObject<'gc> {
    /// Get the value of a particular property on this object.
    ///
    /// The `avm`, `context`, and `this` parameters exist so that this object
    /// can call virtual properties. Furthermore, since some virtual properties
    /// may resolve on the AVM stack, this function may return `None` instead
    /// of a `Value`. *This is not equivalent to `undefined`.* Instead, it is a
    /// signal that your value will be returned on the ActionScript stack, and
    /// that you should register a stack continuation in order to get it.
    fn get_local(
        &self,
        name: &str,
        avm: &mut Avm1<'gc>,
        context: &mut UpdateContext<'_, 'gc, '_>,
        this: Object<'gc>,
    ) -> Result<Value<'gc>, Error> {
        if name == "__proto__" {
            return Ok(self.proto().map_or(Value::Undefined, Value::Object));
        }

        if let Some(value) = self.0.read().values.get(name, avm.is_case_sensitive()) {
            return value
                .get(avm, context, this, Some((*self).into()))?
                .resolve(avm, context);
        }

        Ok(Value::Undefined)
    }

    /// Set a named property on the object.
    ///
    /// This function takes a redundant `this` parameter which should be
    /// the object's own `GcCell`, so that it can pass it to user-defined
    /// overrides that may need to interact with the underlying object.
    fn set(
        &self,
        name: &str,
        value: Value<'gc>,
        avm: &mut Avm1<'gc>,
        context: &mut UpdateContext<'_, 'gc, '_>,
    ) -> Result<(), Error> {
        self.internal_set(
            name,
            value,
            avm,
            context,
            (*self).into(),
            Some((*self).into()),
        )
    }

    /// Call the underlying object.
    ///
    /// This function takes a redundant `this` parameter which should be
    /// the object's own `GcCell`, so that it can pass it to user-defined
    /// overrides that may need to interact with the underlying object.
    fn call(
        &self,
        _avm: &mut Avm1<'gc>,
        _context: &mut UpdateContext<'_, 'gc, '_>,
        _this: Object<'gc>,
        _base_proto: Option<Object<'gc>>,
        _args: &[Value<'gc>],
    ) -> Result<Value<'gc>, Error> {
        Ok(Value::Undefined)
    }

    fn call_setter(
        &self,
        name: &str,
        value: Value<'gc>,
        avm: &mut Avm1<'gc>,
        context: &mut UpdateContext<'_, 'gc, '_>,
        this: Object<'gc>,
    ) -> Result<ReturnValue<'gc>, Error> {
        match self
            .0
            .write(context.gc_context)
            .values
            .get_mut(name, avm.is_case_sensitive())
        {
            Some(propref) if propref.is_virtual() => {
                propref.set(avm, context, this, Some((*self).into()), value)
            }
            _ => Ok(Value::Undefined.into()),
        }
    }

    #[allow(clippy::new_ret_no_self)]
    fn new(
        &self,
        _avm: &mut Avm1<'gc>,
        context: &mut UpdateContext<'_, 'gc, '_>,
        this: Object<'gc>,
        _args: &[Value<'gc>],
    ) -> Result<Object<'gc>, Error> {
        match self.0.read().array {
            ArrayStorage::Vector(_) => {
                Ok(ScriptObject::array(context.gc_context, Some(this)).into())
            }
            ArrayStorage::Properties { .. } => {
                Ok(ScriptObject::object(context.gc_context, Some(this)).into())
            }
        }
    }

    /// Delete a named property from the object.
    ///
    /// Returns false if the property cannot be deleted.
    fn delete(
        &self,
        avm: &mut Avm1<'gc>,
        gc_context: MutationContext<'gc, '_>,
        name: &str,
    ) -> bool {
        let mut object = self.0.write(gc_context);
        if let Some(prop) = object.values.get(name, avm.is_case_sensitive()) {
            if prop.can_delete() {
                object.values.remove(name, avm.is_case_sensitive());
                return true;
            }
        }

        false
    }

    fn add_property(
        &self,
        gc_context: MutationContext<'gc, '_>,
        name: &str,
        get: Executable<'gc>,
        set: Option<Executable<'gc>>,
        attributes: EnumSet<Attribute>,
    ) {
        self.0.write(gc_context).values.insert(
            name.to_owned(),
            Property::Virtual {
                get,
                set,
                attributes,
            },
            false,
        );
    }

    fn add_property_with_case(
        &self,
        avm: &mut Avm1<'gc>,
        gc_context: MutationContext<'gc, '_>,
        name: &str,
        get: Executable<'gc>,
        set: Option<Executable<'gc>>,
        attributes: EnumSet<Attribute>,
    ) {
        self.0.write(gc_context).values.insert(
            name.to_owned(),
            Property::Virtual {
                get,
                set,
                attributes,
            },
            avm.is_case_sensitive(),
        );
    }

    fn define_value(
        &self,
        gc_context: MutationContext<'gc, '_>,
        name: &str,
        value: Value<'gc>,
        attributes: EnumSet<Attribute>,
    ) {
        self.0.write(gc_context).values.insert(
            name.to_string(),
            Property::Stored { value, attributes },
            false,
        );
    }

    fn set_attributes(
        &mut self,
        gc_context: MutationContext<'gc, '_>,
        name: Option<&str>,
        set_attributes: EnumSet<Attribute>,
        clear_attributes: EnumSet<Attribute>,
    ) {
        match name {
            None => {
                // Change *all* attributes.
                for (_name, prop) in self.0.write(gc_context).values.iter_mut() {
                    let new_atts = (prop.attributes() - clear_attributes) | set_attributes;
                    prop.set_attributes(new_atts);
                }
            }
            Some(name) => {
                if let Some(prop) = self.0.write(gc_context).values.get_mut(name, false) {
                    let new_atts = (prop.attributes() - clear_attributes) | set_attributes;
                    prop.set_attributes(new_atts);
                }
            }
        }
    }

    fn proto(&self) -> Option<Object<'gc>> {
        self.0.read().prototype
    }

    fn set_proto(&self, gc_context: MutationContext<'gc, '_>, prototype: Option<Object<'gc>>) {
        self.0.write(gc_context).prototype = prototype;
    }

    /// Checks if the object has a given named property.
    fn has_property(
        &self,
        avm: &mut Avm1<'gc>,
        context: &mut UpdateContext<'_, 'gc, '_>,
        name: &str,
    ) -> bool {
        self.has_own_property(avm, context, name)
            || self
                .proto()
                .as_ref()
                .map_or(false, |p| p.has_property(avm, context, name))
    }

    /// Checks if the object has a given named property on itself (and not,
    /// say, the object's prototype or superclass)
    fn has_own_property(
        &self,
        avm: &mut Avm1<'gc>,
        _context: &mut UpdateContext<'_, 'gc, '_>,
        name: &str,
    ) -> bool {
        if name == "__proto__" {
            return true;
        }
        self.0
            .read()
            .values
            .contains_key(name, avm.is_case_sensitive())
    }

    fn has_own_virtual(
        &self,
        avm: &mut Avm1<'gc>,
        _context: &mut UpdateContext<'_, 'gc, '_>,
        name: &str,
    ) -> bool {
        if let Some(slot) = self.0.read().values.get(name, avm.is_case_sensitive()) {
            slot.is_virtual()
        } else {
            false
        }
    }

    fn is_property_overwritable(&self, avm: &mut Avm1<'gc>, name: &str) -> bool {
        self.0
            .read()
            .values
            .get(name, avm.is_case_sensitive())
            .map(|p| p.is_overwritable())
            .unwrap_or(false)
    }

    /// Checks if a named property appears when enumerating the object.
    fn is_property_enumerable(&self, avm: &mut Avm1<'gc>, name: &str) -> bool {
        if let Some(prop) = self.0.read().values.get(name, avm.is_case_sensitive()) {
            prop.is_enumerable()
        } else {
            false
        }
    }

    /// Enumerate the object.
    fn get_keys(&self, avm: &mut Avm1<'gc>) -> Vec<String> {
        let proto_keys = self.proto().map_or_else(Vec::new, |p| p.get_keys(avm));
        let mut out_keys = vec![];
        let object = self.0.read();

        // Prototype keys come first.
        out_keys.extend(
            proto_keys
                .into_iter()
                .filter(|k| !object.values.contains_key(k, avm.is_case_sensitive())),
        );

        // Then our own keys.
        out_keys.extend(self.0.read().values.iter().filter_map(move |(k, p)| {
            if p.is_enumerable() {
                Some(k.to_string())
            } else {
                None
            }
        }));

        out_keys
    }

    fn as_string(&self) -> String {
        "[object Object]".to_string()
    }

    fn type_of(&self) -> &'static str {
        self.0.read().type_of
    }

    fn interfaces(&self) -> Vec<Object<'gc>> {
        self.0.read().interfaces.clone()
    }

    fn set_interfaces(&mut self, context: MutationContext<'gc, '_>, iface_list: Vec<Object<'gc>>) {
        self.0.write(context).interfaces = iface_list;
    }

    fn as_script_object(&self) -> Option<ScriptObject<'gc>> {
        Some(*self)
    }

    fn as_ptr(&self) -> *const ObjectPtr {
        self.0.as_ptr() as *const ObjectPtr
    }

    fn length(&self) -> usize {
        match &self.0.read().array {
            ArrayStorage::Vector(vector) => vector.len(),
            ArrayStorage::Properties { length } => *length,
        }
    }

    fn set_length(&self, gc_context: MutationContext<'gc, '_>, new_length: usize) {
        let mut to_remove = None;

        match &mut self.0.write(gc_context).array {
            ArrayStorage::Vector(vector) => {
                let old_length = vector.len();
                vector.resize(new_length, Value::Undefined);
                if new_length < old_length {
                    to_remove = Some(new_length..old_length);
                }
            }
            ArrayStorage::Properties { length } => {
                *length = new_length;
            }
        }
        if let Some(to_remove) = to_remove {
            for i in to_remove {
                self.sync_native_property(&i.to_string(), gc_context, None);
            }
        }
        self.sync_native_property("length", gc_context, Some(new_length.into()));
    }

    fn array(&self) -> Vec<Value<'gc>> {
        match &self.0.read().array {
            ArrayStorage::Vector(vector) => vector.to_owned(),
            ArrayStorage::Properties { length } => {
                let mut values = Vec::new();
                for i in 0..*length {
                    values.push(self.array_element(i));
                }
                values
            }
        }
    }

    fn array_element(&self, index: usize) -> Value<'gc> {
        match &self.0.read().array {
            ArrayStorage::Vector(vector) => {
                if let Some(value) = vector.get(index) {
                    value.to_owned()
                } else {
                    Value::Undefined
                }
            }
            ArrayStorage::Properties { length } => {
                if index < *length {
                    if let Some(Property::Stored { value, .. }) =
                        self.0.read().values.get(&index.to_string(), false)
                    {
                        return value.to_owned();
                    }
                }
                Value::Undefined
            }
        }
    }

    fn set_array_element(
        &self,
        index: usize,
        value: Value<'gc>,
        gc_context: MutationContext<'gc, '_>,
    ) -> usize {
        self.sync_native_property(&index.to_string(), gc_context, Some(value.clone()));
        let mut adjust_length = false;
        let length = match &mut self.0.write(gc_context).array {
            ArrayStorage::Vector(vector) => {
                if index >= vector.len() {
                    vector.resize(index + 1, Value::Undefined);
                }
                vector[index] = value.clone();
                adjust_length = true;
                vector.len()
            }
            ArrayStorage::Properties { length } => *length,
        };
        if adjust_length {
            self.sync_native_property("length", gc_context, Some(length.into()));
        }
        length
    }

    fn delete_array_element(&self, index: usize, gc_context: MutationContext<'gc, '_>) {
        if let ArrayStorage::Vector(vector) = &mut self.0.write(gc_context).array {
            if index < vector.len() {
                vector[index] = Value::Undefined;
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    use crate::avm1::activation::Activation;
    use crate::avm1::property::Attribute::*;
    use crate::backend::audio::NullAudioBackend;
    use crate::backend::input::NullInputBackend;
    use crate::backend::navigator::NullNavigatorBackend;
    use crate::backend::render::NullRenderer;
    use crate::display_object::MovieClip;
    use crate::library::Library;
    use crate::loader::LoadManager;
    use crate::prelude::*;
    use crate::tag_utils::{SwfMovie, SwfSlice};
    use gc_arena::rootless_arena;
    use rand::{rngs::SmallRng, SeedableRng};
    use std::collections::BTreeMap;
    use std::sync::Arc;

    fn with_object<F, R>(swf_version: u8, test: F) -> R
    where
        F: for<'a, 'gc> FnOnce(&mut Avm1<'gc>, &mut UpdateContext<'a, 'gc, '_>, Object<'gc>) -> R,
    {
        rootless_arena(|gc_context| {
            let mut avm = Avm1::new(gc_context, swf_version);
            let swf = Arc::new(SwfMovie::empty(swf_version));
            let mut root: DisplayObject<'_> =
                MovieClip::new(SwfSlice::empty(swf.clone()), gc_context).into();
            root.set_depth(gc_context, 0);
            let mut levels = BTreeMap::new();
            levels.insert(0, root);

            let mut context = UpdateContext {
                gc_context,
                global_time: 0,
                player_version: 32,
                swf: &swf,
                levels: &mut levels,
                rng: &mut SmallRng::from_seed([0u8; 16]),
                action_queue: &mut crate::context::ActionQueue::new(),
                audio: &mut NullAudioBackend::new(),
                input: &mut NullInputBackend::new(),
                background_color: &mut Color {
                    r: 0,
                    g: 0,
                    b: 0,
                    a: 0,
                },
                library: &mut Library::default(),
                navigator: &mut NullNavigatorBackend::new(),
                renderer: &mut NullRenderer::new(),
                system_prototypes: avm.prototypes().clone(),
                mouse_hovered_object: None,
                mouse_position: &(Twips::new(0), Twips::new(0)),
                drag_object: &mut None,
                stage_size: (Twips::from_pixels(550.0), Twips::from_pixels(400.0)),
                player: None,
                load_manager: &mut LoadManager::new(),
            };

            root.post_instantiation(&mut avm, &mut context, root, None);

            let object = ScriptObject::object(gc_context, Some(avm.prototypes().object)).into();

            let globals = avm.global_object_cell();
            avm.insert_stack_frame(GcCell::allocate(
                gc_context,
                Activation::from_nothing(swf_version, globals, gc_context, root),
            ));

            test(&mut avm, &mut context, object)
        })
    }

    #[test]
    fn test_get_undefined() {
        with_object(0, |avm, context, object| {
            assert_eq!(
                object.get("not_defined", avm, context).unwrap(),
                Value::Undefined
            );
        })
    }

    #[test]
    fn test_set_get() {
        with_object(0, |avm, context, object| {
            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "forced",
                "forced".into(),
                EnumSet::empty(),
            );
            object
                .set("natural", "natural".into(), avm, context)
                .unwrap();

            assert_eq!(object.get("forced", avm, context).unwrap(), "forced".into());
            assert_eq!(
                object.get("natural", avm, context).unwrap(),
                "natural".into()
            );
        })
    }

    #[test]
    fn test_set_readonly() {
        with_object(0, |avm, context, object| {
            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "normal",
                "initial".into(),
                EnumSet::empty(),
            );
            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "readonly",
                "initial".into(),
                ReadOnly.into(),
            );

            object
                .set("normal", "replaced".into(), avm, context)
                .unwrap();
            object
                .set("readonly", "replaced".into(), avm, context)
                .unwrap();

            assert_eq!(
                object.get("normal", avm, context).unwrap(),
                "replaced".into()
            );
            assert_eq!(
                object.get("readonly", avm, context).unwrap(),
                "initial".into()
            );
        })
    }

    #[test]
    fn test_deletable_not_readonly() {
        with_object(0, |avm, context, object| {
            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "test",
                "initial".into(),
                DontDelete.into(),
            );

            assert_eq!(object.delete(avm, context.gc_context, "test"), false);
            assert_eq!(object.get("test", avm, context).unwrap(), "initial".into());

            object
                .as_script_object()
                .unwrap()
                .set("test", "replaced".into(), avm, context)
                .unwrap();

            assert_eq!(object.delete(avm, context.gc_context, "test"), false);
            assert_eq!(object.get("test", avm, context).unwrap(), "replaced".into());
        })
    }

    #[test]
    fn test_virtual_get() {
        with_object(0, |avm, context, object| {
            let getter = Executable::Native(|_avm, _context, _this, _args| {
                Ok(ReturnValue::Immediate("Virtual!".into()))
            });

            object.as_script_object().unwrap().add_property(
                context.gc_context,
                "test",
                getter,
                None,
                EnumSet::empty(),
            );

            assert_eq!(object.get("test", avm, context).unwrap(), "Virtual!".into());

            // This set should do nothing
            object.set("test", "Ignored!".into(), avm, context).unwrap();
            assert_eq!(object.get("test", avm, context).unwrap(), "Virtual!".into());
        })
    }

    #[test]
    fn test_delete() {
        with_object(0, |avm, context, object| {
            let getter = Executable::Native(|_avm, _context, _this, _args| {
                Ok(ReturnValue::Immediate("Virtual!".into()))
            });

            object.as_script_object().unwrap().add_property(
                context.gc_context,
                "virtual",
                getter.clone(),
                None,
                EnumSet::empty(),
            );
            object.as_script_object().unwrap().add_property(
                context.gc_context,
                "virtual_un",
                getter,
                None,
                DontDelete.into(),
            );
            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "stored",
                "Stored!".into(),
                EnumSet::empty(),
            );
            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "stored_un",
                "Stored!".into(),
                DontDelete.into(),
            );

            assert_eq!(object.delete(avm, context.gc_context, "virtual"), true);
            assert_eq!(object.delete(avm, context.gc_context, "virtual_un"), false);
            assert_eq!(object.delete(avm, context.gc_context, "stored"), true);
            assert_eq!(object.delete(avm, context.gc_context, "stored_un"), false);
            assert_eq!(
                object.delete(avm, context.gc_context, "non_existent"),
                false
            );

            assert_eq!(
                object.get("virtual", avm, context).unwrap(),
                Value::Undefined
            );
            assert_eq!(
                object.get("virtual_un", avm, context).unwrap(),
                "Virtual!".into()
            );
            assert_eq!(
                object.get("stored", avm, context).unwrap(),
                Value::Undefined
            );
            assert_eq!(
                object.get("stored_un", avm, context).unwrap(),
                "Stored!".into()
            );
        })
    }

    #[test]
    fn test_iter_values() {
        with_object(0, |avm, context, object| {
            let getter = Executable::Native(|_avm, _context, _this, _args| {
                Ok(ReturnValue::Immediate(Value::Null))
            });

            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "stored",
                Value::Null,
                EnumSet::empty(),
            );
            object.as_script_object().unwrap().define_value(
                context.gc_context,
                "stored_hidden",
                Value::Null,
                DontEnum.into(),
            );
            object.as_script_object().unwrap().add_property(
                context.gc_context,
                "virtual",
                getter.clone(),
                None,
                EnumSet::empty(),
            );
            object.as_script_object().unwrap().add_property(
                context.gc_context,
                "virtual_hidden",
                getter,
                None,
                DontEnum.into(),
            );

            let keys: Vec<_> = object.get_keys(avm);
            assert_eq!(keys.len(), 2);
            assert_eq!(keys.contains(&"stored".to_string()), true);
            assert_eq!(keys.contains(&"stored_hidden".to_string()), false);
            assert_eq!(keys.contains(&"virtual".to_string()), true);
            assert_eq!(keys.contains(&"virtual_hidden".to_string()), false);
        })
    }
}