src/spread/obj-spread-order.case

// Copyright (C) 2017 Caio Lima. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: Spread operation follows [[OwnPropertyKeys]] order
template: default
esid: pending
includes: [compareArray.js]
info: |
    Pending Runtime Semantics: PropertyDefinitionEvaluation

    PropertyDefinition:...AssignmentExpression

    1. Let exprValue be the result of evaluating AssignmentExpression.
    2. Let fromValue be GetValue(exprValue).
    3. ReturnIfAbrupt(fromValue).
    4. Let excludedNames be a new empty List.
    5. Return CopyDataProperties(object, fromValue, excludedNames).
features: [Symbol, object-spread]
---*/

//- setup
var calls = [];
var o = { get z() { calls.push('z') }, get a() { calls.push('a') } };
Object.defineProperty(o, 1, { get: () => { calls.push(1) }, enumerable: true });
Object.defineProperty(o, Symbol('foo'), { get: () => { calls.push("Symbol(foo)") }, enumerable: true });

//- args
{...o}
//- params
obj
//- body
assert.compareArray(calls, [1, 'z', 'a', "Symbol(foo)"]);
assert.sameValue(Object.keys(obj).length, 3);