1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-is-undefined.js b/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-is-undefined.js
new file mode 100644
index 0000000000..255c0d5a09
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-is-undefined.js
@@ -0,0 +1,30 @@
+// 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
+info: |
+  String.prototype.matchAll ( regexp )
+    1. Let O be ? RequireObjectCoercible(this value).
+    2. If regexp is neither undefined nor null, then
+      [...]
+    3. Return ? MatchAllIterator(regexp, O).
+
+  MatchAllIterator( regexp, O )
+    [...]
+    2. If ? IsRegExp(regexp) is true, then
+      [...]
+    3. Else,
+      a. Let R be RegExpCreate(regexp, "g").
+features: [String.prototype.matchAll]
+includes: [compareArray.js, compareIterator.js, regExpUtils.js]
+---*/
+
+var str = 'a';
+
+assert.compareIterator(str.matchAll(undefined), [
+  matchValidator([''], 0, str),
+  matchValidator([''], 1, str)
+]);
+
+reportCompare(0, 0);