1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/WeakMap-set-returns-this.js b/js/src/jit-test/tests/collections/WeakMap-set-returns-this.js
new file mode 100644
index 0000000000..f62c75fa1a
--- /dev/null
+++ b/js/src/jit-test/tests/collections/WeakMap-set-returns-this.js
@@ -0,0 +1,9 @@
+// Bug 1031632 - Map.prototype.set, WeakMap.prototype.set and
+// Set.prototype.add should be chainable
+
+var wm = new WeakMap();
+var bar = {};
+assertEq(wm.set(bar, 'BAR'), wm);
+var foo = {};
+var a = wm.set(foo, 'FOO').get(foo);
+assertEq(a, 'FOO');