1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-matchAll-is-undefined-or-null.js b/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-matchAll-is-undefined-or-null.js
new file mode 100644
index 0000000000..ae29ed7feb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/matchAll/regexp-matchAll-is-undefined-or-null.js
@@ -0,0 +1,40 @@
+// 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[@@matchAll] is undefined or null
+info: |
+  String.prototype.matchAll ( regexp )
+    1. Let O be ? RequireObjectCoercible(this value).
+    2. If regexp is neither undefined nor null, then
+      a. Let matcher be ? GetMethod(regexp, @@matchAll).
+      b. If matcher is not undefined, then
+        [...]
+    3. Let S be ? ToString(O).
+    4. Let rx be ? RegExpCreate(R, "g").
+    5. Return ? Invoke(rx, @@matchAll, « S »).
+features: [Symbol.matchAll, String.prototype.matchAll]
+---*/
+
+var regexp = /./g;
+var callCount = 0;
+var arg;
+var obj = {};
+var str = 'abc';
+RegExp.prototype[Symbol.matchAll] = function(string) {
+  arg = string;
+  callCount++;
+  return obj;
+};
+
+regexp[Symbol.matchAll] = undefined;
+assert.sameValue(str.matchAll(regexp), obj);
+assert.sameValue(arg, str);
+assert.sameValue(callCount, 1);
+
+regexp[Symbol.matchAll] = null;
+assert.sameValue(str.matchAll(regexp), obj);
+assert.sameValue(arg, str);
+assert.sameValue(callCount, 2);
+
+reportCompare(0, 0);