1 files changed, 7 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Map-set-returns-this.js b/js/src/jit-test/tests/collections/Map-set-returns-this.js
new file mode 100644
index 0000000000..2120b09a35
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Map-set-returns-this.js
@@ -0,0 +1,7 @@
+// Bug 1031632 - Map.prototype.set, WeakMap.prototype.set and
+// Set.prototype.add should be chainable
+
+var m = new Map();
+assertEq(m.set('oof', 'RAB'), m);
+var a = m.set('foo', 'BAR').get('foo');
+assertEq(a, 'BAR');