js/src/jit-test/tests/proxy/testDirectProxyGet12.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

load(libdir + "asserts.js");

let {object: target, transplant} = transplantableObject(options);
let otherGlobal = newGlobal({newCompartment: true});

var returnValue = 42;
var handler = {
  get(t, p) {
    if (returnValue != 42) {
      transplant(otherGlobal);
      Object.defineProperty(target, "x", {
        value: 42,
        writable: false,
        configurable: false,
      });
    }
    return returnValue;
  }
};
var proxy = new Proxy(target, handler);

function testGet(p) {
  return p.x;
}

for (i = 0; i < 200; i++) {
  assertEq(testGet(proxy), returnValue);
}

returnValue = 43;
assertThrowsInstanceOf(function () { testGet(proxy) }, TypeError);