d0db1c39ca
ES6 specifies the function name property (it was not part of ES5) and
it specifies the name of Function.prototype to the empty string ("" and
not "Empty"). This makes us match Firefox, Safari and IE developer
preview.
BUG=v8:4033
LOG=N
R=adamk@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1080393004
Cr-Commit-Position: refs/heads/master@{#28021}
116 lines
2.4 KiB
JavaScript
116 lines
2.4 KiB
JavaScript
// Copyright 2015 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.
|
|
|
|
function getStrictF() {
|
|
'use strict';
|
|
return function f() {};
|
|
}
|
|
|
|
|
|
function getSloppyF() {
|
|
return function f() {};
|
|
}
|
|
|
|
|
|
function test(testFunction) {
|
|
testFunction(getStrictF());
|
|
testFunction(getSloppyF());
|
|
}
|
|
|
|
|
|
function testDescriptor(f) {
|
|
var descr = Object.getOwnPropertyDescriptor(f, 'name');
|
|
assertTrue(descr.configurable);
|
|
assertFalse(descr.enumerable);
|
|
assertEquals('f', descr.value);
|
|
assertFalse(descr.writable);
|
|
}
|
|
test(testDescriptor);
|
|
|
|
|
|
function testSet(f) {
|
|
f.name = 'g';
|
|
assertEquals('f', f.name);
|
|
}
|
|
test(testSet);
|
|
|
|
|
|
function testSetStrict(f) {
|
|
'use strict';
|
|
assertThrows(function() {
|
|
f.name = 'g';
|
|
}, TypeError);
|
|
}
|
|
test(testSetStrict);
|
|
|
|
|
|
function testReconfigureAsDataProperty(f) {
|
|
Object.defineProperty(f, 'name', {
|
|
value: 'g',
|
|
});
|
|
assertEquals('g', f.name);
|
|
Object.defineProperty(f, 'name', {
|
|
writable: true
|
|
});
|
|
f.name = 'h';
|
|
assertEquals('h', f.name);
|
|
|
|
f.name = 42;
|
|
assertEquals(42, f.name);
|
|
}
|
|
test(testReconfigureAsDataProperty);
|
|
|
|
|
|
function testReconfigureAsAccessorProperty(f) {
|
|
var name = 'g';
|
|
Object.defineProperty(f, 'name', {
|
|
get: function() { return name; },
|
|
set: function(v) { name = v; }
|
|
});
|
|
assertEquals('g', f.name);
|
|
f.name = 'h';
|
|
assertEquals('h', f.name);
|
|
}
|
|
test(testReconfigureAsAccessorProperty);
|
|
|
|
|
|
function testFunctionToString(f) {
|
|
Object.defineProperty(f, 'name', {
|
|
value: {toString: function() { assertUnreachable(); }},
|
|
});
|
|
assertEquals('function f() {}', f.toString());
|
|
}
|
|
test(testFunctionToString);
|
|
|
|
|
|
(function testSetOnInstance() {
|
|
// This needs to come before testDelete below
|
|
assertTrue(Function.prototype.hasOwnProperty('name'));
|
|
|
|
function f() {}
|
|
delete f.name;
|
|
assertEquals('', f.name);
|
|
|
|
f.name = 42;
|
|
assertEquals('', f.name); // non writable prototype property.
|
|
assertFalse(f.hasOwnProperty('name'));
|
|
|
|
Object.defineProperty(Function.prototype, 'name', {writable: true});
|
|
|
|
f.name = 123;
|
|
assertTrue(f.hasOwnProperty('name'));
|
|
assertEquals(123, f.name);
|
|
})();
|
|
|
|
|
|
(function testDelete() {
|
|
function f() {}
|
|
assertTrue(delete f.name);
|
|
assertFalse(f.hasOwnProperty('name'));
|
|
assertEquals('', f.name);
|
|
|
|
assertTrue(delete Function.prototype.name);
|
|
assertEquals(undefined, f.name);
|
|
})();
|