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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/browsers/the-window-object/window-indexed-properties-strict.html - WPT Dashboard Interop Dashboard
<!doctype html>
<meta charset=utf-8>
<title>Indexed properties of the window object (strict mode)</title>
<link rel="author" title="Ms2ger" href="ms2ger@gmail.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<iframe></iframe>
<script>
test(function() {
"use strict";
assert_false("-1" in window, "-1 not in window");
assert_equals(window[-1], undefined);
window[-1] = "foo";
assert_equals(window[-1], "foo");
});
test(function() {
"use strict";
assert_throws_js(TypeError, function() {
window[0] = "foo";
});
assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { value: "bar" }))
assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { get() { return "baz" } }))
assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { set(v) { return "qux" } }))
assert_equals(window[0],
document.getElementsByTagName("iframe")[0].contentWindow);
assert_throws_js(TypeError, () => delete window[0]);
});
test(function() {
"use strict";
assert_throws_js(TypeError, function() {
window[1] = "foo";
});
assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { value: "bar" }))
assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { get() { return "baz" } }))
assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { set(v) { return "qux" } }))
assert_equals(window[1], undefined);
assert_equals(Object.getOwnPropertyDescriptor(window, 1), undefined);
assert_equals(delete window[1], true);
});
test(function() {
"use strict";
assert_throws_js(TypeError, () => { window[4294967294] = 1; });
assert_false(Reflect.set(window, 4294967294, 2));
assert_false(Reflect.defineProperty(window, 4294967294, { value: 3 }));
assert_throws_js(TypeError, () => Object.defineProperty(window, 4294967294, { get: () => 4 }));
assert_equals(window[4294967294], undefined);
assert_false(4294967294 in window);
assert_true(delete window[4294967294]);
}, "Borderline numeric key: 2 ** 32 - 2 is an index (strict mode)");
test(function() {
"use strict";
window[4294967295] = 1;
assert_equals(window[4294967295], 1);
assert_true(Reflect.set(window, 4294967295, 2));
assert_equals(window[4294967295], 2);
assert_true(Reflect.defineProperty(window, 4294967295, { value: 3 }));
assert_equals(window[4294967295], 3);
Object.defineProperty(window, 4294967295, { get: () => 4 });
assert_equals(window[4294967295], 4);
assert_true(delete window[4294967295]);
assert_false(4294967295 in window);
}, "Borderline numeric key: 2 ** 32 - 1 is not an index (strict mode)");
test(function() {
"use strict";
var proto = Window.prototype;
[-1, 0, 1].forEach(function(idx) {
assert_false(idx in proto, idx + " in proto");
});
});
</script>