Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // Flags: --strong-mode |
| 6 | |
| 7 | "use strict"; |
| 8 | |
| 9 | function getClass() { |
| 10 | class Foo { |
| 11 | static get bar() { return 0 } |
| 12 | get bar() { return 0 } |
| 13 | } |
| 14 | return Foo; |
| 15 | } |
| 16 | |
| 17 | function getClassExpr() { |
| 18 | return (class { static get bar() { return 0 } get bar() { return 0 } }); |
| 19 | } |
| 20 | |
| 21 | function getClassStrong() { |
| 22 | "use strong"; |
| 23 | class Foo { |
| 24 | static get bar() { return 0 } |
| 25 | get bar() { return 0 } |
| 26 | } |
| 27 | return Foo; |
| 28 | } |
| 29 | |
| 30 | function getClassExprStrong() { |
| 31 | "use strong"; |
| 32 | return (class { static get bar() { return 0 } get bar() { return 0 } }); |
| 33 | } |
| 34 | |
| 35 | function addProperty(o) { |
| 36 | o.baz = 1; |
| 37 | } |
| 38 | |
| 39 | function convertPropertyToData(o) { |
| 40 | assertTrue(o.hasOwnProperty("bar")); |
| 41 | Object.defineProperty(o, "bar", { value: 1 }); |
| 42 | } |
| 43 | |
| 44 | function testWeakClass(classFunc) { |
| 45 | assertDoesNotThrow(function(){addProperty(classFunc())}); |
| 46 | assertDoesNotThrow(function(){addProperty(classFunc().prototype)}); |
| 47 | assertDoesNotThrow(function(){convertPropertyToData(classFunc())}); |
| 48 | assertDoesNotThrow(function(){convertPropertyToData(classFunc().prototype)}); |
| 49 | } |
| 50 | |
| 51 | function testStrongClass(classFunc) { |
| 52 | assertThrows(function(){addProperty(classFunc())}, TypeError); |
| 53 | assertThrows(function(){addProperty(classFunc().prototype)}, TypeError); |
| 54 | assertThrows(function(){convertPropertyToData(classFunc())}, TypeError); |
| 55 | assertThrows(function(){convertPropertyToData(classFunc().prototype)}, |
| 56 | TypeError); |
| 57 | } |
| 58 | |
| 59 | testWeakClass(getClass); |
| 60 | testWeakClass(getClassExpr); |
| 61 | |
| 62 | testStrongClass(getClassStrong); |
| 63 | testStrongClass(getClassExprStrong); |
| 64 | |
| 65 | // Check strong classes don't freeze their parents. |
| 66 | (function() { |
| 67 | let parent = getClass(); |
| 68 | |
| 69 | let classFunc = function() { |
| 70 | "use strong"; |
| 71 | class Foo extends parent { |
| 72 | static get bar() { return 0 } |
| 73 | get bar() { return 0 } |
| 74 | } |
| 75 | return Foo; |
| 76 | } |
| 77 | |
| 78 | testStrongClass(classFunc); |
| 79 | assertDoesNotThrow(function(){addProperty(parent)}); |
| 80 | assertDoesNotThrow(function(){convertPropertyToData(parent)}); |
| 81 | })(); |
| 82 | |
| 83 | // Check strong classes don't freeze their children. |
| 84 | (function() { |
| 85 | let parent = getClassStrong(); |
| 86 | |
| 87 | let classFunc = function() { |
| 88 | class Foo extends parent { |
| 89 | static get bar() { return 0 } |
| 90 | get bar() { return 0 } |
| 91 | } |
| 92 | return Foo; |
| 93 | } |
| 94 | |
| 95 | assertThrows(function(){addProperty(parent)}, TypeError); |
| 96 | assertThrows(function(){convertPropertyToData(parent)}, TypeError); |
| 97 | testWeakClass(classFunc); |
| 98 | })(); |