blob: b9a7ad8012488d320a6210dc7bdeb9e62dcb3ec7 [file] [log] [blame]
// 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.
function TestBasics() {
var log = [];
var proxy = new Proxy({}, {
get: function(target, key) {
log.push("get " + String(key));
if (key === 'x') return 1;
},
has: function(target, key) {
log.push("has " + String(key));
if (key === 'x') return true;
return false;
}
});
var x = 'local';
with (proxy) {
assertEquals(1, x);
}
assertEquals(['has assertEquals', 'has x', 'get Symbol(Symbol.unscopables)',
'get x'], log);
}
TestBasics();
function TestInconsistent() {
var log = [];
var proxy = new Proxy({}, {
get: function(target, key) {
log.push("get " + String(key));
return undefined;
},
has: function(target, key) {
log.push("has " + String(key));
if (key === 'x') return true;
return false;
}
});
var x = 'local';
with (proxy) {
assertEquals(void 0, x);
}
assertEquals(['has assertEquals', 'has x', 'get Symbol(Symbol.unscopables)',
'get x'], log);
}
TestInconsistent();
function TestUseProxyAsUnscopables() {
var x = 1;
var object = {
x: 2
};
var calls = 0;
var proxy = new Proxy({}, {
has: function() {
assertUnreachable();
},
get: function(target, key) {
assertEquals('x', key);
calls++;
return calls === 2 ? true : undefined;
}
});
object[Symbol.unscopables] = proxy;
with (object) {
assertEquals(2, x);
assertEquals(1, x);
}
// HasBinding, HasBinding
assertEquals(2, calls);
}
TestUseProxyAsUnscopables();
function TestThrowInHasUnscopables() {
var x = 1;
var object = {
x: 2
};
function CustomError() {}
var calls = 0;
var proxy = new Proxy({}, {
has: function() {
assertUnreachable();
},
get: function(target, key) {
if (calls++ === 0) {
throw new CustomError();
}
assertUnreachable();
}
});
object[Symbol.unscopables] = proxy;
assertThrows(function() {
with (object) {
x;
}
}, CustomError);
}
TestThrowInHasUnscopables();
var global = this;
function TestGlobalShouldIgnoreUnscopables() {
global.x = 1;
var proxy = new Proxy({}, {
get: function() {
assertUnreachable();
},
has: function() {
assertUnreachable();
}
});
global[Symbol.unscopables] = proxy;
assertEquals(1, global.x);
assertEquals(1, x);
global.x = 2;
assertEquals(2, global.x);
assertEquals(2, x);
x = 3;
assertEquals(3, global.x);
assertEquals(3, x);
}
TestGlobalShouldIgnoreUnscopables();