window-indexed-properties-strict.html (3159B)
1 <!doctype html> 2 <meta charset=utf-8> 3 <title>Indexed properties of the window object (strict mode)</title> 4 <link rel="author" title="Ms2ger" href="ms2ger@gmail.com"> 5 <link rel="help" href="https://html.spec.whatwg.org/multipage/#window"> 6 <link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-window-item"> 7 <link rel="help" href="https://webidl.spec.whatwg.org/#getownproperty"> 8 <link rel="help" href="https://webidl.spec.whatwg.org/#defineownproperty"> 9 <script src="/resources/testharness.js"></script> 10 <script src="/resources/testharnessreport.js"></script> 11 <div id=log></div> 12 <iframe></iframe> 13 <script> 14 test(function() { 15 "use strict"; 16 assert_false("-1" in window, "-1 not in window"); 17 assert_equals(window[-1], undefined); 18 window[-1] = "foo"; 19 assert_equals(window[-1], "foo"); 20 }); 21 test(function() { 22 "use strict"; 23 assert_throws_js(TypeError, function() { 24 window[0] = "foo"; 25 }); 26 assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { value: "bar" })) 27 assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { get() { return "baz" } })) 28 assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { set(v) { return "qux" } })) 29 assert_equals(window[0], 30 document.getElementsByTagName("iframe")[0].contentWindow); 31 assert_throws_js(TypeError, () => delete window[0]); 32 }); 33 test(function() { 34 "use strict"; 35 assert_throws_js(TypeError, function() { 36 window[1] = "foo"; 37 }); 38 assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { value: "bar" })) 39 assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { get() { return "baz" } })) 40 assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { set(v) { return "qux" } })) 41 assert_equals(window[1], undefined); 42 assert_equals(Object.getOwnPropertyDescriptor(window, 1), undefined); 43 assert_equals(delete window[1], true); 44 }); 45 test(function() { 46 "use strict"; 47 assert_throws_js(TypeError, () => { window[4294967294] = 1; }); 48 assert_false(Reflect.set(window, 4294967294, 2)); 49 assert_false(Reflect.defineProperty(window, 4294967294, { value: 3 })); 50 assert_throws_js(TypeError, () => Object.defineProperty(window, 4294967294, { get: () => 4 })); 51 assert_equals(window[4294967294], undefined); 52 assert_false(4294967294 in window); 53 assert_true(delete window[4294967294]); 54 }, "Borderline numeric key: 2 ** 32 - 2 is an index (strict mode)"); 55 test(function() { 56 "use strict"; 57 window[4294967295] = 1; 58 assert_equals(window[4294967295], 1); 59 assert_true(Reflect.set(window, 4294967295, 2)); 60 assert_equals(window[4294967295], 2); 61 assert_true(Reflect.defineProperty(window, 4294967295, { value: 3 })); 62 assert_equals(window[4294967295], 3); 63 Object.defineProperty(window, 4294967295, { get: () => 4 }); 64 assert_equals(window[4294967295], 4); 65 assert_true(delete window[4294967295]); 66 assert_false(4294967295 in window); 67 }, "Borderline numeric key: 2 ** 32 - 1 is not an index (strict mode)"); 68 test(function() { 69 "use strict"; 70 var proto = Window.prototype; 71 [-1, 0, 1].forEach(function(idx) { 72 assert_false(idx in proto, idx + " in proto"); 73 }); 74 }); 75 </script>