319af35d1d
assertEquals() compares objects by comparing each property for both objects. This was done by using Object.keys() which however only returns enumerable properties. With this change also non-enumerable properties are compared. Still, the comparison doesn't require the properties to be equal. So, if one property is marked enumerable in one object but not the other, the objects would still be considered equal. This could be adapted in a follow-up CL if desired. The prototype is still ignored for the comparison. Change-Id: I1bb9df055bfb764ac1c02d971ac6f4a50f4a98e8 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3876384 Commit-Queue: Matthias Liedtke <mliedtke@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/main@{#83058}
112 lines
3.6 KiB
JavaScript
112 lines
3.6 KiB
JavaScript
// Copyright 2014 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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function TestStringPrototypeIterator() {
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assertTrue(String.prototype.hasOwnProperty(Symbol.iterator));
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assertFalse("".hasOwnProperty(Symbol.iterator));
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assertFalse("".propertyIsEnumerable(Symbol.iterator));
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}
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TestStringPrototypeIterator();
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function assertIteratorResult(value, done, result) {
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assertEquals({value: value, done: done}, result);
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}
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function TestManualIteration() {
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var string = "abc";
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var iterator = string[Symbol.iterator]();
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assertIteratorResult('a', false, iterator.next());
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assertIteratorResult('b', false, iterator.next());
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assertIteratorResult('c', false, iterator.next());
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assertIteratorResult(void 0, true, iterator.next());
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assertIteratorResult(void 0, true, iterator.next());
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}
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TestManualIteration();
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function TestSurrogatePairs() {
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var lo = "\uD834";
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var hi = "\uDF06";
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var pair = lo + hi;
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var string = "abc" + pair + "def" + lo + pair + hi + lo;
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var iterator = string[Symbol.iterator]();
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assertIteratorResult('a', false, iterator.next());
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assertIteratorResult('b', false, iterator.next());
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assertIteratorResult('c', false, iterator.next());
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assertIteratorResult(pair, false, iterator.next());
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assertIteratorResult('d', false, iterator.next());
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assertIteratorResult('e', false, iterator.next());
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assertIteratorResult('f', false, iterator.next());
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assertIteratorResult(lo, false, iterator.next());
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assertIteratorResult(pair, false, iterator.next());
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assertIteratorResult(hi, false, iterator.next());
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assertIteratorResult(lo, false, iterator.next());
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assertIteratorResult(void 0, true, iterator.next());
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assertIteratorResult(void 0, true, iterator.next());
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}
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TestSurrogatePairs();
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function TestStringIteratorPrototype() {
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var iterator = ""[Symbol.iterator]();
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var StringIteratorPrototype = iterator.__proto__;
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assertFalse(StringIteratorPrototype.hasOwnProperty('constructor'));
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assertSame(StringIteratorPrototype.__proto__.__proto__, Object.prototype);
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assertArrayEquals(['next'],
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Object.getOwnPropertyNames(StringIteratorPrototype));
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assertEquals('[object String Iterator]', "" + iterator);
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assertEquals("String Iterator", StringIteratorPrototype[Symbol.toStringTag]);
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var desc = Object.getOwnPropertyDescriptor(
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StringIteratorPrototype, Symbol.toStringTag);
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assertTrue(desc.configurable);
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assertFalse(desc.writable);
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assertEquals("String Iterator", desc.value);
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}
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TestStringIteratorPrototype();
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function TestForOf() {
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var lo = "\uD834";
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var hi = "\uDF06";
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var pair = lo + hi;
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var string = "abc" + pair + "def" + lo + pair + hi + lo;
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var expected = ['a', 'b', 'c', pair, 'd', 'e', 'f', lo, pair, hi, lo];
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var i = 0;
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for (var char of string) {
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assertEquals(expected[i++], char);
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}
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assertEquals(expected.length, i);
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}
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TestForOf();
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function TestNonOwnSlots() {
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var iterator = ""[Symbol.iterator]();
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var object = {__proto__: iterator};
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assertThrows(function() { object.next(); }, TypeError);
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}
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TestNonOwnSlots();
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function TestSlicedStringRegression() {
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var long_string = "abcdefhijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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var sliced_string = long_string.substring(1);
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var iterator = sliced_string[Symbol.iterator]();
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}
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TestSlicedStringRegression();
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(function(){
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var str = "\uD83C\uDF1F\u5FCD\u8005\u306E\u653B\u6483\uD83C\uDF1F";
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var arr = [...str];
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assertEquals(["\uD83C\uDF1F", "\u5FCD", "\u8005", "\u306E", "\u653B",
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"\u6483", "\uD83C\uDF1F"], arr);
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assertEquals(7, arr.length);
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})();
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