// Copyright (C) 2021 Alexey Shvayka. All rights reserved. // This code is governed by the license found in the LICENSE file. /*--- esid: sec-object.assign description: > [[Set]] to non-existing property of sealed `target` fails with TypeError. info: | SetIntegrityLevel ( O, level ) [...] 3. Let status be ? O.[[PreventExtensions]](). [...] Object.assign ( target, ...sources ) [...] 3. For each element nextSource of sources, do a. If nextSource is neither undefined nor null, then [...] iii. For each element nextKey of keys, do 1. Let desc be ? from.[[GetOwnProperty]](nextKey). 2. If desc is not undefined and desc.[[Enumerable]] is true, then [...] b. Perform ? Set(to, nextKey, propValue, true). OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc ) [...] 3. If IsDataDescriptor(ownDesc) is true, then [...] c. Let existingDescriptor be ? Receiver.[[GetOwnProperty]](P). d. If existingDescriptor is not undefined, then [...] e. Else, i. Assert: Receiver does not currently have a property P. ii. Return ? CreateDataProperty(Receiver, P, V). ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current ) [...] 2. If current is undefined, then a. If extensible is false, return false. features: [Symbol, Reflect] ---*/ var target1 = Object.seal({ foo: 1 }); assert.throws(TypeError, function() { Object.assign(target1, { get bar() {} }); }); var target2 = {}; Object.seal(target2); assert.throws(TypeError, function() { Object.assign(target2, { [Symbol()]: 1 }); }); reportCompare(0, 0);