69 lines
1.5 KiB
HTML
69 lines
1.5 KiB
HTML
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<!DOCTYPE html>
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<html>
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<body>
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<script src="../../resources/js-test-pre.js"></script>
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<script>
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description("Tests various cases of const variable shadowing on Window.");
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let sentinel = "good";
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</script>
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<script>
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debug("Should throw because Window has a non-configurable location own property.");
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</script>
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<script>
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const location = 3;
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sentinel = "bad";
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</script>
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<script>
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shouldBeEqualToString("sentinel", "good");
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</script>
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<script>
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debug("");
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debug("Should throw because window has an own property foo that is not configurable, even though its value is undefined.");
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Object.defineProperty(window, 'foo', {value: undefined, configurable: false, writable: true});
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</script>
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<script>
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const foo = 3;
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sentinel = "bad";
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</script>
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<script>
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shouldBeEqualToString("sentinel", "good");
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</script>
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<script>
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debug("");
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debug("Should work because Window's own bar property is configurable.");
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Object.defineProperty(window, 'bar', {value: 2, configurable: true, writable: true});
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sentinel = "bad";
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</script>
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<script>
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const bar = 3;
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sentinel = "good";
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shouldBe("bar", "3");
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</script>
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<script>
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shouldBeEqualToString("sentinel", "good");
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</script>
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<script>
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debug("");
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debug("Should work because dispatchEvent is not an own property, it comes from the prototype chain.");
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sentinel = "bad"
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</script>
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<script>
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const dispatchEvent = 3;
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sentinel = "good";
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shouldBe("dispatchEvent", "3");
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</script>
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<script>
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shouldBeEqualToString("sentinel", "good");
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</script>
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<script>
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successfullyParsed = true;
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</script>
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<script src="../../resources/js-test-post.js"></script>
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</body>
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</html>
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