michael@0: function testStrict() {
michael@0:     var n = 10, a = [];
michael@0:     for (var i = 0; i < 10; ++i) {
michael@0:         a[0] = (n === 10);
michael@0:         a[1] = (n !== 10);
michael@0:         a[2] = (n === null);
michael@0:         a[3] = (n == null);
michael@0:     }
michael@0:     return a.join(",");
michael@0: }
michael@0: assertEq(testStrict(), "true,false,false,false");