test_getweakmapkeys.html (1816B)
1 <!DOCTYPE HTML> 2 <html> 3 <!-- 4 https://bugzilla.mozilla.org/show_bug.cgi?id=688277 5 --> 6 <head> 7 <meta charset="utf-8"> 8 <title>Tests for nondeterministicGetWeakMapKeys</title> 9 <script src="/tests/SimpleTest/SimpleTest.js"></script> 10 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> 11 <script type="application/javascript"> 12 /** Test for Bug 688277 **/ 13 14 /* Fail gracefully if junk is passed in. */ 15 is(SpecialPowers.nondeterministicGetWeakMapKeys(11), undefined, 16 "nondeterministicGetWeakMapKeys should return undefined for non-objects"); 17 is(SpecialPowers.nondeterministicGetWeakMapKeys({}), undefined, 18 "nondeterministicGetWeakMapKeys should return undefined for non-weakmap objects"); 19 is(SpecialPowers.nondeterministicGetWeakMapKeys(null), undefined, 20 "nondeterministicGetWeakMapKeys should return undefined for null"); 21 22 /* return an empty array for an empty WeakMap */ 23 let mempty = new WeakMap(); 24 is(SpecialPowers.nondeterministicGetWeakMapKeys(mempty).length, 0, 25 "nondeterministicGetWeakMapKeys should return empty array for empty weakmap"); 26 27 /* Test freeing/nonfreeing. */ 28 let m = new WeakMap(); 29 let liveKeys = new Array(); 30 31 let add_elements = function () { 32 let k1 = {}; 33 m.set(k1, "live1"); 34 liveKeys.push(k1); 35 36 let k2 = {}; 37 m.set(k2, "dead1"); 38 39 let k = {}; 40 m.set(k, k); /* simple cycle */ 41 }; 42 43 add_elements(); 44 45 SpecialPowers.exactGC(function () { 46 let keys = SpecialPowers.nondeterministicGetWeakMapKeys(m); 47 is(liveKeys.length, 1, "Wrong number of live keys."); 48 is(keys.length, 1, "Should have one weak map key."); 49 is(m.get(keys[0]), "live1", "live1 should be live"); 50 SimpleTest.finish(); 51 }); 52 53 SimpleTest.waitForExplicitFinish(); 54 </script> 55 </head> 56 <body> 57 <p id="display"></p> 58 </body> 59 </html>