1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/WeakSet-delete.js b/js/src/jit-test/tests/collections/WeakSet-delete.js
new file mode 100644
index 0000000000..0309ad7131
--- /dev/null
+++ b/js/src/jit-test/tests/collections/WeakSet-delete.js
@@ -0,0 +1,32 @@
+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);