<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=688277 --> <head> <meta charset="utf-8"> <title>Tests for nondeterministicGetWeakMapKeys</title> <script src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> <script type="application/javascript"> /** Test for Bug 688277 **/ /* Fail gracefully if junk is passed in. */ is(SpecialPowers.nondeterministicGetWeakMapKeys(11), undefined, "nondeterministicGetWeakMapKeys should return undefined for non-objects"); is(SpecialPowers.nondeterministicGetWeakMapKeys({}), undefined, "nondeterministicGetWeakMapKeys should return undefined for non-weakmap objects"); is(SpecialPowers.nondeterministicGetWeakMapKeys(null), undefined, "nondeterministicGetWeakMapKeys should return undefined for null"); /* return an empty array for an empty WeakMap */ let mempty = new WeakMap(); is(SpecialPowers.nondeterministicGetWeakMapKeys(mempty).length, 0, "nondeterministicGetWeakMapKeys should return empty array for empty weakmap"); /* Test freeing/nonfreeing. */ let m = new WeakMap(); let liveKeys = new Array(); let add_elements = function () { let k1 = {}; m.set(k1, "live1"); liveKeys.push(k1); let k2 = {}; m.set(k2, "dead1"); let k = {}; m.set(k, k); /* simple cycle */ }; add_elements(); SpecialPowers.exactGC(function () { let keys = SpecialPowers.nondeterministicGetWeakMapKeys(m); is(liveKeys.length, 1, "Wrong number of live keys."); is(keys.length, 1, "Should have one weak map key."); is(m.get(keys[0]), "live1", "live1 should be live"); SimpleTest.finish(); }); SimpleTest.waitForExplicitFinish(); </script> </head> <body> <p id="display"></p> </body> </html>