79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
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// Copyright 2022 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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//
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// Flags: --allow-natives-syntax
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function TestDetachSucceeds(originalKey, detachKey) {
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const ab = new ArrayBuffer(100);
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%ArrayBufferSetDetachKey(ab, originalKey);
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%ArrayBufferDetach(ab, detachKey);
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assertEquals(0, ab.byteLength); // Detached.
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}
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function TestDetachFails(originalKey, detachKey) {
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const ab = new ArrayBuffer(100);
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%ArrayBufferSetDetachKey(ab, originalKey);
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assertThrows(() => { %ArrayBufferDetach(ab, detachKey); }, TypeError);
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assertEquals(100, ab.byteLength); // Not detached.
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}
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(function DetachWithKey() {
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TestDetachSucceeds("foo", "foo");
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const part1 = "fo";
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const part2 = "o";
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TestDetachSucceeds("foo", part1 + part2);
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TestDetachSucceeds(1337, 1337);
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TestDetachSucceeds(null, null);
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const obj = {a: 1};
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TestDetachSucceeds(obj, obj);
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TestDetachFails("foo", "bar");
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TestDetachFails("foo", undefined);
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TestDetachFails(1337, 1338);
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TestDetachFails(1337, undefined);
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TestDetachFails(null, 0);
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TestDetachFails(null, undefined);
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TestDetachFails({a: 1}, {a: 1});
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})();
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(function DetachTwice() {
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const ab = new ArrayBuffer(100);
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%ArrayBufferSetDetachKey(ab, "foo");
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%ArrayBufferDetach(ab, "foo");
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assertEquals(0, ab.byteLength);
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// If the detach key is wrong, an error is thrown even if the buffer was
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// already detached.
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assertThrows(() => { %ArrayBufferDetach(ab, "bar"); });
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})();
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(function DetachWithoutKey() {
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// This test cannot be implemented via TestDetachFails, since the
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// non-existence of the detach key parameter is not the same thing as it being
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// undefined.
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const ab = new ArrayBuffer(100);
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%ArrayBufferSetDetachKey(ab, "foo");
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assertThrows(() => { %ArrayBufferDetach(ab); }, TypeError);
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assertEquals(100, ab.byteLength); // Not detached.
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})();
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(function DetachKeyProvidedEvenThoughWeDontNeedOne() {
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// This test cannot be implemented via TestDetachFails, since the
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// non-existence of the detach key parameter is not the same thing as it being
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// undefined.
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const ab1 = new ArrayBuffer(100); // No detach key.
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assertThrows(() => { %ArrayBufferDetach(ab1, 'unnecessary'); }, TypeError);
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assertEquals(100, ab1.byteLength); // Not detached.
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%ArrayBufferDetach(ab1, undefined); // Passing undefined is fine.
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assertEquals(0, ab1.byteLength); // Detached.
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const ab2 = new ArrayBuffer(100); // No detach key.
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%ArrayBufferDetach(ab2); // Passing no detach key is fine.
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assertEquals(0, ab2.byteLength); // Detached.
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})();
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