1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-is-undefined-or-null-invokes-matchAll.js b/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-is-undefined-or-null-invokes-matchAll.js
new file mode 100644
index 0000000000..17a08e3282
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-is-undefined-or-null-invokes-matchAll.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2018 Peter Wong. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: pending
+description: Behavior when regexp is null or undefined
+info: |
+  String.prototype.matchAll ( regexp )
+    1. Let O be ? RequireObjectCoercible(this value).
+    2. If regexp is neither undefined nor null, then
+      [...]
+    3. Let S be ? ToString(O).
+    4. Let rx be ? RegExpCreate(R, "g").
+    5. Return ? Invoke(rx, @@matchAll, « S »).
+features: [String.prototype.matchAll]
+---*/
+
+var callCount = 0;
+var obj = {};
+RegExp.prototype[Symbol.matchAll] = function() {
+  callCount++;
+  return obj;
+};
+
+assert.sameValue('a'.matchAll(null), obj);
+assert.sameValue(callCount, 1);
+
+assert.sameValue(''.matchAll(undefined), obj);
+assert.sameValue(callCount, 2);
+
+
+reportCompare(0, 0);