v8/test/mjsunit/es8/object-values.js

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// Copyright 2016 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: --allow-natives-syntax
function TestMeta() {
assertEquals(1, Object.values.length);
assertEquals(Function.prototype, Object.getPrototypeOf(Object.values));
assertEquals("values", Object.values.name);
var descriptor = Object.getOwnPropertyDescriptor(Object, "values");
assertTrue(descriptor.writable);
assertFalse(descriptor.enumerable);
assertTrue(descriptor.configurable);
assertThrows(() => new Object.values({}), TypeError);
}
TestMeta();
function TestBasic() {
var x = 16;
var O = {
d: 1,
c: 3,
[Symbol.iterator]: void 0,
0: 123,
1000: 456,
[x * x]: "ducks",
[`0x${(x * x).toString(16)}`]: "quack"
};
O.a = 2;
O.b = 4;
Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN });
assertEquals([123, "ducks", 456, 1, 3, "quack", 2, 4], Object.values(O));
assertEquals(Object.values(O), Object.keys(O).map(key => O[key]));
assertTrue(Array.isArray(Object.values({})));
assertEquals(0, Object.values({}).length);
}
TestBasic();
function TestToObject() {
assertThrows(function() { Object.values(); }, TypeError);
assertThrows(function() { Object.values(null); }, TypeError);
assertThrows(function() { Object.values(void 0); }, TypeError);
}
TestToObject();
function TestOrder() {
var O = {
a: 1,
[Symbol.iterator]: null
};
O[456] = 123;
Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN });
var priv = %CreatePrivateSymbol("Secret");
O[priv] = 56;
var log = [];
var P = new Proxy(O, {
ownKeys(target) {
log.push("[[OwnPropertyKeys]]");
return Reflect.ownKeys(target);
},
get(target, name) {
log.push(`[[Get]](${JSON.stringify(name)})`);
return Reflect.get(target, name);
},
getOwnPropertyDescriptor(target, name) {
log.push(`[[GetOwnProperty]](${JSON.stringify(name)})`);
return Reflect.getOwnPropertyDescriptor(target, name);
},
set(target, name, value) {
assertUnreachable();
}
});
assertEquals([123, 1], Object.values(P));
assertEquals([
"[[OwnPropertyKeys]]",
"[[GetOwnProperty]](\"456\")",
"[[Get]](\"456\")",
"[[GetOwnProperty]](\"a\")",
"[[Get]](\"a\")",
"[[GetOwnProperty]](\"HIDDEN\")"
], log);
}
TestOrder();
function TestOrderWithDuplicates() {
var O = {
a: 1,
[Symbol.iterator]: null
};
O[456] = 123;
Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN });
O[priv] = 56;
var priv = %CreatePrivateSymbol("private");
var log = [];
var P = new Proxy(O, {
ownKeys(target) {
log.push("[[OwnPropertyKeys]]");
return [ "a", Symbol.iterator, "a", "456", "HIDDEN", "HIDDEN", "456" ];
},
get(target, name) {
log.push(`[[Get]](${JSON.stringify(name)})`);
return Reflect.get(target, name);
},
getOwnPropertyDescriptor(target, name) {
log.push(`[[GetOwnProperty]](${JSON.stringify(name)})`);
return Reflect.getOwnPropertyDescriptor(target, name);
},
set(target, name, value) {
assertUnreachable();
}
});
assertEquals([1, 1, 123, 123], Object.values(P));
assertEquals([
"[[OwnPropertyKeys]]",
"[[GetOwnProperty]](\"a\")",
"[[Get]](\"a\")",
"[[GetOwnProperty]](\"a\")",
"[[Get]](\"a\")",
"[[GetOwnProperty]](\"456\")",
"[[Get]](\"456\")",
"[[GetOwnProperty]](\"HIDDEN\")",
"[[GetOwnProperty]](\"HIDDEN\")",
"[[GetOwnProperty]](\"456\")",
"[[Get]](\"456\")",
], log);
}
TestOrderWithDuplicates();
function TestPropertyFilter() {
var object = { prop3: 30 };
object[2] = 40;
object["prop4"] = 50;
Object.defineProperty(object, "prop5", { value: 60, enumerable: true });
Object.defineProperty(object, "prop6", { value: 70, enumerable: false });
Object.defineProperty(object, "prop7", {
enumerable: true, get() { return 80; }});
var sym = Symbol("prop8");
object[sym] = 90;
values = Object.values(object);
assertEquals(5, values.length);
assertEquals([40,30,50,60,80], values);
}
TestPropertyFilter();
function TestWithProxy() {
var obj1 = {prop1:10};
var proxy1 = new Proxy(obj1, { });
assertEquals([10], Object.values(proxy1));
var obj2 = {};
Object.defineProperty(obj2, "prop2", { value: 20, enumerable: true });
Object.defineProperty(obj2, "prop3", {
get() { return 30; }, enumerable: true });
var proxy2 = new Proxy(obj2, {
getOwnPropertyDescriptor(target, name) {
return Reflect.getOwnPropertyDescriptor(target, name);
}
});
assertEquals([20, 30], Object.values(proxy2));
var obj3 = {};
var count = 0;
var proxy3 = new Proxy(obj3, {
get(target, property, receiver) {
return count++ * 5;
},
getOwnPropertyDescriptor(target, property) {
return { configurable: true, enumerable: true };
},
ownKeys(target) {
return [ "prop0", "prop1", Symbol("prop2"), Symbol("prop5") ];
}
});
assertEquals([0, 5], Object.values(proxy3));
}
TestWithProxy();
function TestMutateDuringEnumeration() {
var aDeletesB = {
get a() {
delete this.b;
return 1;
},
b: 2
};
assertEquals([1], Object.values(aDeletesB));
var aRemovesB = {
get a() {
Object.defineProperty(this, "b", { enumerable: false });
return 1;
},
b: 2
};
assertEquals([1], Object.values(aRemovesB));
var aAddsB = { get a() { this.b = 2; return 1; } };
assertEquals([1], Object.values(aAddsB));
var aMakesBEnumerable = {};
Object.defineProperty(aMakesBEnumerable, "a", {
get() {
Object.defineProperty(this, "b", { enumerable: true });
return 1;
},
enumerable: true
});
Object.defineProperty(aMakesBEnumerable, "b", {
value: 2, configurable:true, enumerable: false });
assertEquals([1, 2], Object.values(aMakesBEnumerable));
}
TestMutateDuringEnumeration();
(function TestElementKinds() {
var O1 = { name: "1" }, O2 = { name: "2" }, O3 = { name: "3" };
var PI = 3.141592653589793;
var E = 2.718281828459045;
function fastSloppyArguments(a, b, c) {
delete arguments[0];
arguments[0] = a;
return arguments;
}
function slowSloppyArguments(a, b, c) {
delete arguments[0];
arguments[0] = a;
Object.defineProperties(arguments, {
0: {
enumerable: true,
value: a
},
9999: {
enumerable: false,
value: "Y"
}
});
arguments[10000] = "X";
return arguments;
}
var element_kinds = {
FAST_SMI_ELEMENTS: [ [1, 2, 3], [1, 2, 3] ],
FAST_HOLEY_SMI_ELEMENTS: [ [, , 3], [ 3 ] ],
FAST_ELEMENTS: [ [O1, O2, O3], [O1, O2, O3] ],
FAST_HOLEY_ELEMENTS: [ [, , O3], [O3] ],
FAST_DOUBLE_ELEMENTS: [ [E, NaN, PI], [E, NaN, PI] ],
FAST_HOLEY_DOUBLE_ELEMENTS: [ [, , NaN], [NaN] ],
DICTIONARY_ELEMENTS: [ Object.defineProperties({ 10000: "world" }, {
100: { enumerable: true, value: "hello" },
99: { enumerable: false, value: "nope" }
}), [ "hello", "world" ] ],
FAST_SLOPPY_ARGUMENTS_ELEMENTS: [
fastSloppyArguments("a", "b", "c"), ["a", "b", "c"] ],
SLOW_SLOPPY_ARGUMENTS_ELEMENTS: [
slowSloppyArguments("a", "b", "c"), [ "a", "b", "c", "X"]],
FAST_STRING_WRAPPER_ELEMENTS: [ new String("str"), ["s", "t", "r"] ],
SLOW_STRING_WRAPPER_ELEMENTS: [
Object.defineProperties(new String("str"), {
10000: { enumerable: false, value: "X" },
9999: { enumerable: true, value: "Y" }
}), ["s", "t", "r", "Y"] ],
};
for (let [kind, [object, expected]] of Object.entries(element_kinds)) {
let result1 = Object.values(object);
assertEquals(expected, result1, `fast Object.values() with ${kind}`);
let proxy = new Proxy(object, {});
let result2 = Object.values(proxy);
assertEquals(result1, result2, `slow Object.values() with ${kind}`);
}
})();