1// Copyright 2016 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#include "src/v8.h"
6
7#include "test/cctest/cctest.h"
8
9namespace {
10
11int* global_use_counts = NULL;
12
13void MockUseCounterCallback(v8::Isolate* isolate,
14                            v8::Isolate::UseCounterFeature feature) {
15  ++global_use_counts[feature];
16}
17}
18
19TEST(DefineGetterSetterThrowUseCount) {
20  v8::Isolate* isolate = CcTest::isolate();
21  v8::HandleScope scope(isolate);
22  LocalContext env;
23  int use_counts[v8::Isolate::kUseCounterFeatureCount] = {};
24  global_use_counts = use_counts;
25  CcTest::isolate()->SetUseCounterCallback(MockUseCounterCallback);
26
27  // __defineGetter__ and __defineSetter__ do not increment
28  // kDefineGetterOrSetterWouldThrow on success
29  CompileRun(
30      "var a = {};"
31      "Object.defineProperty(a, 'b', { value: 0, configurable: true });"
32      "a.__defineGetter__('b', ()=>{});");
33  CHECK_EQ(0, use_counts[v8::Isolate::kDefineGetterOrSetterWouldThrow]);
34  CompileRun(
35      "var a = {};"
36      "Object.defineProperty(a, 'b', { value: 0, configurable: true });"
37      "a.__defineSetter__('b', ()=>{});");
38  CHECK_EQ(0, use_counts[v8::Isolate::kDefineGetterOrSetterWouldThrow]);
39
40  // __defineGetter__ and __defineSetter__ do not increment
41  // kDefineGetterOrSetterWouldThrow on other errors
42  v8::Local<v8::Value> resultProxyThrow = CompileRun(
43      "var exception;"
44      "try {"
45      "var a = new Proxy({}, { defineProperty: ()=>{throw new Error;} });"
46      "a.__defineGetter__('b', ()=>{});"
47      "} catch (e) { exception = e; }"
48      "exception");
49  CHECK_EQ(0, use_counts[v8::Isolate::kDefineGetterOrSetterWouldThrow]);
50  CHECK(resultProxyThrow->IsObject());
51  resultProxyThrow = CompileRun(
52      "var exception;"
53      "try {"
54      "var a = new Proxy({}, { defineProperty: ()=>{throw new Error;} });"
55      "a.__defineSetter__('b', ()=>{});"
56      "} catch (e) { exception = e; }"
57      "exception");
58  CHECK_EQ(0, use_counts[v8::Isolate::kDefineGetterOrSetterWouldThrow]);
59  CHECK(resultProxyThrow->IsObject());
60
61  // __defineGetter__ and __defineSetter__ increment
62  // kDefineGetterOrSetterWouldThrow when they would throw per spec (B.2.2.2)
63  CompileRun(
64      "var a = {};"
65      "Object.defineProperty(a, 'b', { value: 0, configurable: false });"
66      "a.__defineGetter__('b', ()=>{});");
67  CHECK_EQ(1, use_counts[v8::Isolate::kDefineGetterOrSetterWouldThrow]);
68  CompileRun(
69      "var a = {};"
70      "Object.defineProperty(a, 'b', { value: 0, configurable: false });"
71      "a.__defineSetter__('b', ()=>{});");
72  CHECK_EQ(2, use_counts[v8::Isolate::kDefineGetterOrSetterWouldThrow]);
73}
74