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// Test handling of false return from a handler.defineProperty() hook.
load(libdir + "asserts.js");
var obj = {x: 1, y: 2};
var nope = false;
var p = new Proxy(obj, {
defineProperty(target, key, desc) { return nope; }
});
// Object.defineProperty throws on failure.
print(1);
assertThrowsInstanceOf(() => Object.defineProperty(p, "z", {value: 3}), TypeError);
assertEq("z" in obj, false);
assertThrowsInstanceOf(() => Object.defineProperty(p, "x", {value: 0}), TypeError);
// Setting a property ultimately causes [[DefineOwnProperty]] to be called.
// In strict mode code only, this is a TypeError.
print(2);
assertEq(p.z = 3, 3);
assertThrowsInstanceOf(() => { "use strict"; p.z = 3; }, TypeError);
// Other falsy values also trigger failure.
print(3);
for (nope of [0, -0, NaN, ""])
assertThrowsInstanceOf(() => { "use strict"; p.z = 3; }, TypeError);
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