test_getweakmapkeys.html

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https://bugzilla.mozilla.org/show_bug.cgi?id=688277

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  <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>

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