WeakSet-delete.js - mozsearch

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var ws = new WeakSet;

// Delete on empty

assertEq(ws.delete({}), false);

// Delete existing

var value = {};

ws.add(value);

assertEq(ws.has(value), true);

assertEq(ws.delete(value), true);

assertEq(ws.has(value), false);

// Delete non-empty

for (var i = 0; i < 10; i++)

    ws.add({});

assertEq(ws.add(value), ws);

assertEq(ws.has(value), true);

assertEq(ws.delete(value), true);

assertEq(ws.has(value), false);

assertEq(ws.delete(value), false);

assertEq(ws.has(value), false);

// Delete primitive

assertEq(ws.delete(15), false);

// Delete with cross-compartment WeakSet

ws = new (newGlobal().WeakSet);

WeakSet.prototype.add.call(ws, value);

assertEq(WeakSet.prototype.has.call(ws, value), true);

assertEq(WeakSet.prototype.delete.call(ws, value), true);

assertEq(WeakSet.prototype.has.call(ws, value), false);

assertEq(WeakSet.prototype.delete.call(ws, value), false);