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a7cbf19a82
PR-URL: https://github.com/nodejs/node/pull/38273 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Mary Marchini <oss@mmarchini.me>
47 lines
1.8 KiB
JavaScript
47 lines
1.8 KiB
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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function TestBuiltinSubclassing(Builtin) {
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if (!%IsDictPropertyConstTrackingEnabled()) {
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// TODO(v8:11248) In the current implementation of
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// v8_dict_property_const_tracking, prototypes are converted to dictionary
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// mode in many places, but we don't guarantee that they are *created* as
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// dictionary mode objects, yet. This will be fixed in the future. Until
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// then, if v8_dict_property_const_tracking is enabled, we cannot always
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// know for sure if a builtin has been converted already or not.
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assertTrue(%HasFastProperties(Builtin));
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}
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assertTrue(%HasFastProperties(Builtin.prototype));
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin.prototype.__proto__));
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class SubClass extends Builtin {}
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin));
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin.prototype));
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin.prototype.__proto__));
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}
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let TypedArray = Uint8Array.__proto__;
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TestBuiltinSubclassing(RegExp);
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TestBuiltinSubclassing(Promise);
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TestBuiltinSubclassing(Array);
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TestBuiltinSubclassing(TypedArray);
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TestBuiltinSubclassing(Uint8Array);
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TestBuiltinSubclassing(Int8Array);
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TestBuiltinSubclassing(Uint16Array);
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TestBuiltinSubclassing(Int16Array);
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TestBuiltinSubclassing(Uint32Array);
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TestBuiltinSubclassing(Int32Array);
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TestBuiltinSubclassing(Float32Array);
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TestBuiltinSubclassing(Float64Array);
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TestBuiltinSubclassing(Uint8ClampedArray);
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