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Test Info:
<!DOCTYPE HTML>
<html>
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<meta charset="utf-8">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=793969">Mozilla Bug 793969</a>
<p id="display"></p>
<div id="content" style="display: none">
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<pre id="test">
<script type="application/javascript">
function checkThrows(f, desc, skipMessageCheck) {
try {
f();
ok(false, "Should have thrown for " + desc);
} catch (e) {
ok(true, "threw correctly");
if (!skipMessageCheck)
ok(/denied/.exec(e) ||
/can't redefine non-configurable property/.exec(e),
"Correctly threw a security exception: " + e);
}
}
// NB: These sets will be no-ops (throw in strict mode) because setting an inherited readonly value prop has those semantics.
checkThrows(function() { "use strict"; location.valueOf = 'hah'; }, 'Shadow with string', /* skipMessageCheck = */ true);
checkThrows(function() { "use strict"; location.valueOf = function() { return {a: 'hah'};} }, 'Shadow with function', /* skipMessageCheck = */ true);
checkThrows(function() { Object.defineProperty(location, 'valueOf', { value: function() { return 'hah'; } }); }, 'defineProperty with value');
checkThrows(function() { delete location.valueOf; Object.defineProperty(location, 'valueOf', { value: function() { return 'hah'; } }); }, 'delete + defineProperty with value');
checkThrows(function() { Object.defineProperty(location, 'valueOf', { get: function() { return 'hah'; } }); }, 'defineProperty with getter');
checkThrows(function() { delete location.valueOf; Object.defineProperty(location, 'valueOf', { get: function() { return 'hah'; } }); }, 'delete + defineProperty with getter');
Object.prototype.valueOf = function() { return 'hah'; };
is(({}).valueOf(), 'hah', "Shadowing on Object.prototype works for vanilla objects");
is(location.valueOf(), location, "Shadowing on Object.prototype and Location.prototype doesn't for location objects");
location[Symbol.toPrimitive] = function() { return 'hah'; }
is(location + "", location.toString(), "Should't be able to shadow with toPrimitive");
</script>
</pre>
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