testTestIntegrityLevel.js

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// isSealed/isFrozen should short-circuit.

var count = 0;

var target = Object.preventExtensions({a: 1, b: 2, c: 3});

var p = new Proxy(target, {

    getOwnPropertyDescriptor(t, id) {

        count++;

        return Object.getOwnPropertyDescriptor(t, id);

});

assertEq(Object.isSealed(p), false);

assertEq(count, 1);

count = 0;

assertEq(Object.isFrozen(p), false);

assertEq(count, 1);

Object.seal(target);

count = 0;

assertEq(Object.isSealed(p), true);

assertEq(count, 3);

count = 0;

assertEq(Object.isFrozen(p), false);

assertEq(count, 1);

Object.freeze(target);

count = 0;

assertEq(Object.isFrozen(p), true);

assertEq(count, 3);