michael@0: 
michael@0: // Properties cleared in the middle of a single function constructor.
michael@0: 
michael@0: function foo(x, y) {
michael@0:   this.f = 0;
michael@0:   this.g = x + y;
michael@0:   this.h = 2;
michael@0: }
michael@0: 
michael@0: var called = false;
michael@0: var a = 0;
michael@0: var b = {valueOf: function() { Object.defineProperty(Object.prototype, 'g', {set: function() { called = true }}) }};
michael@0: var c = new foo(a, b);
michael@0: 
michael@0: assertEq(called, true);
michael@0: assertEq(c.g, undefined);
michael@0: 
michael@0: // Properties cleared in the middle of a constructor callee.
michael@0: 
michael@0: function foo2(x, y) {
michael@0:   this.a = 0;
michael@0:   this.b = 1;
michael@0:   bar2.call(this, x, y);
michael@0:   this.c = 2;
michael@0: }
michael@0: function bar2(x, y) {
michael@0:   this.d = x + y;
michael@0:   this.e = 3;
michael@0: }
michael@0: 
michael@0: var called2 = false;
michael@0: var xa = 0;
michael@0: var xb = {valueOf: function() { Object.defineProperty(Object.prototype, 'e', {set: function() { called2 = true }}) }};
michael@0: var xc = new foo2(xa, xb);
michael@0: 
michael@0: assertEq(called2, true);
michael@0: assertEq(xc.e, undefined);
michael@0: assertEq(xc.c, 2);
michael@0: 
michael@0: // Properties cleared after a constructor callee.
michael@0: 
michael@0: function foo3() {
michael@0:   this.aa = 0;
michael@0:   this.bb = 1;
michael@0:   bar3.call(this);
michael@0:   this.cc = 2;
michael@0:   baz();
michael@0:   xbar3.call(this);
michael@0:   this.dd = 3;
michael@0: }
michael@0: function bar3() {
michael@0:   this.ee = 4;
michael@0: }
michael@0: function xbar3() {
michael@0:   this.ff = 5;
michael@0: }
michael@0: function baz() {
michael@0:   eval("xbar3.call = function() { called3 = true }");
michael@0: }
michael@0: 
michael@0: var called3 = false;
michael@0: var c3 = new foo3();
michael@0: assertEq(c3.cc, 2);
michael@0: assertEq(c3.ee, 4);
michael@0: assertEq(c3.ff, undefined);
michael@0: assertEq(c3.dd, 3);
michael@0: assertEq(called3, true);