diff --git a/test/language/expressions/object/dstr/object-rest-proxy-ownkeys-returned-keys-order.js b/test/language/expressions/object/dstr/object-rest-proxy-ownkeys-returned-keys-order.js new file mode 100644 index 0000000000..7351648b97 --- /dev/null +++ b/test/language/expressions/object/dstr/object-rest-proxy-ownkeys-returned-keys-order.js @@ -0,0 +1,45 @@ +// Copyright (C) 2020 Alexey Shvayka. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-destructuring-binding-patterns-runtime-semantics-restbindinginitialization +description: > + Proxy keys are iterated in order they were provided by "ownKeys" trap. +info: | + BindingRestProperty : ... BindingIdentifier + + [...] + 3. Perform ? CopyDataProperties(restObj, value, excludedNames). + + CopyDataProperties ( target, source, excludedItems ) + + [...] + 5. Let keys be ? from.[[OwnPropertyKeys]](). + 6. For each element nextKey of keys in List order, do + [...] + c. If excluded is false, then + i. Let desc be ? from.[[GetOwnProperty]](nextKey). + + [[OwnPropertyKeys]] ( ) + + [...] + 7. Let trapResultArray be ? Call(trap, handler, « target »). + 8. Let trapResult be ? CreateListFromArrayLike(trapResultArray, « String, Symbol »). + [...] + 23. Return trapResult. +features: [object-rest, destructuring-binding, Proxy, Symbol] +includes: [compareArray.js] +---*/ + +var getOwnKeys = []; +var ownKeysResult = [Symbol(), "foo", "0"]; +var proxy = new Proxy({}, { + getOwnPropertyDescriptor: function(_target, key) { + getOwnKeys.push(key); + }, + ownKeys: function() { + return ownKeysResult; + }, +}); + +let {...$} = proxy; +assert.compareArray(getOwnKeys, ownKeysResult);