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Unified Diff: test/mjsunit/harmony/computed-property-names.js

Issue 807173002: ES6 computed property names (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 6 years ago
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Index: test/mjsunit/harmony/computed-property-names.js
diff --git a/test/mjsunit/harmony/computed-property-names.js b/test/mjsunit/harmony/computed-property-names.js
new file mode 100644
index 0000000000000000000000000000000000000000..36ce6754d598b28f979f86e305bfd896bf901ff8
--- /dev/null
+++ b/test/mjsunit/harmony/computed-property-names.js
@@ -0,0 +1,270 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-computed-property-names
+
+
+function ID(x) {
+ return x;
+}
+
+
+
+(function TestBasicsString() {
+ var object = {
+ a: 'A',
+ ['b']: 'B',
+ c: 'C',
+ [ID('d')]: 'D',
+ };
+ assertEquals('A', object.a);
+ assertEquals('B', object.b);
+ assertEquals('C', object.c);
+ assertEquals('D', object.d);
+ assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(object));
+})();
+
+
+(function TestBasicsNumber() {
+ var object = {
+ a: 'A',
+ [1]: 'B',
+ c: 'C',
+ [ID(2)]: 'D',
+ };
+ assertEquals('A', object.a);
+ assertEquals('B', object[1]);
+ assertEquals('C', object.c);
+ assertEquals('D', object[2]);
+ // Array indexes first.
+ assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(object));
+})();
+
+
+(function TestBasicsSymbol() {
+ var sym1 = Symbol();
+ var sym2 = Symbol();
+ var object = {
+ a: 'A',
+ [sym1]: 'B',
+ c: 'C',
+ [ID(sym2)]: 'D',
+ };
+ assertEquals('A', object.a);
+ assertEquals('B', object[sym1]);
+ assertEquals('C', object.c);
+ assertEquals('D', object[sym2]);
+ assertArrayEquals(['a', 'c'], Object.keys(object));
+ assertArrayEquals([sym1, sym2], Object.getOwnPropertySymbols(object));
+})();
+
+
+(function TestToNameSideEffects() {
+ var counter = 0;
+ var key1 = {
+ toString: function() {
+ assertEquals(0, counter++);
+ return 'b';
+ }
+ };
+ var key2 = {
+ toString: function() {
+ assertEquals(1, counter++);
+ return 'd';
+ }
+ };
+ var object = {
+ a: 'A',
+ [key1]: 'B',
+ c: 'C',
+ [key2]: 'D',
+ };
+ assertEquals(2, counter);
+ assertEquals('A', object.a);
+ assertEquals('B', object.b);
+ assertEquals('C', object.c);
+ assertEquals('D', object.d);
+ assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(object));
+})();
+
+
+(function TestToNameSideEffectsNumbers() {
+ var counter = 0;
+ var key1 = {
+ valueOf: function() {
+ assertEquals(0, counter++);
+ return 1;
+ },
+ toString: null
+ };
+ var key2 = {
+ valueOf: function() {
+ assertEquals(1, counter++);
+ return 2;
+ },
+ toString: null
+ };
+
+ var object = {
+ a: 'A',
+ [key1]: 'B',
+ c: 'C',
+ [key2]: 'D',
+ };
+ assertEquals(2, counter);
+ assertEquals('A', object.a);
+ assertEquals('B', object[1]);
+ assertEquals('C', object.c);
+ assertEquals('D', object[2]);
+ // Array indexes first.
+ assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(object));
+})();
+
+
+(function TestDoubleName() {
+ var object = {
+ [1.2]: 'A',
+ [1e55]: 'B',
+ [0.000001]: 'C',
+ [-0]: 'D',
+ [Infinity]: 'E',
+ [-Infinity]: 'F',
+ [NaN]: 'G',
+ };
+ assertEquals('A', object['1.2']);
+ assertEquals('B', object['1e+55']);
+ assertEquals('C', object['0.000001']);
+ assertEquals('D', object[0]);
+ assertEquals('E', object[Infinity]);
+ assertEquals('F', object[-Infinity]);
+ assertEquals('G', object[NaN]);
+})();
+
+
+(function TestGetter() {
+ var object = {
+ get ['a']() {
+ return 'A';
+ }
+ };
+ assertEquals('A', object.a);
+
+ object = {
+ get b() {
+ assertUnreachable();
+ },
+ get ['b']() {
+ return 'B';
+ }
+ };
+ assertEquals('B', object.b);
+
+ object = {
+ get c() {
+ assertUnreachable();
+ },
+ get ['c']() {
+ assertUnreachable();
+ },
+ get ['c']() {
+ return 'C';
+ }
+ };
+ assertEquals('C', object.c);
+
+ object = {
+ get ['d']() {
+ assertUnreachable();
+ },
+ get d() {
+ return 'D';
+ }
+ };
+ assertEquals('D', object.d);
+})();
+
+
+(function TestSetter() {
+ var calls = 0;
+ var object = {
+ set ['a'](_) {
+ calls++;
+ }
+ };
+ object.a = 'A';
+ assertEquals(1, calls);
+
+ calls = 0;
+ object = {
+ set b(_) {
+ assertUnreachable();
+ },
+ set ['b'](_) {
+ calls++;
+ }
+ };
+ object.b = 'B';
+ assertEquals(1, calls);
+
+ calls = 0;
+ object = {
+ set c(_) {
+ assertUnreachable()
+ },
+ set ['c'](_) {
+ assertUnreachable()
+ },
+ set ['c'](_) {
+ calls++
+ }
+ };
+ object.c = 'C';
+ assertEquals(1, calls);
+
+ calls = 0;
+ object = {
+ set ['d'](_) {
+ assertUnreachable()
+ },
+ set d(_) {
+ calls++
+ }
+ };
+ object.d = 'D';
+ assertEquals(1, calls);
+})();
+
+
+(function TestDuplicateKeys() {
+ 'use strict';
+ // ES5 does not allow duplicate keys.
+ // ES6 does but we haven't changed our code yet.
+
+ var object = {
+ a: 1,
+ ['a']: 2,
+ };
+ assertEquals(2, object.a);
+})();
+
+
+(function TestProto() {
+ var proto = {};
+ var object = {
+ __proto__: proto
+ };
+ assertEquals(proto, Object.getPrototypeOf(object));
+
+ object = {
+ '__proto__': proto
+ };
+ assertEquals(proto, Object.getPrototypeOf(object));
+
+ var object = {
+ ['__proto__']: proto
+ };
+ assertEquals(Object.prototype, Object.getPrototypeOf(object));
+ assertEquals(proto, object.__proto__);
+ assertTrue(object.hasOwnProperty('__proto__'));
+})();

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