1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExpStringIteratorPrototype/next/custom-regexpexec.js b/js/src/tests/test262/built-ins/RegExpStringIteratorPrototype/next/custom-regexpexec.js
new file mode 100644
index 0000000000..b7970c1db2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExpStringIteratorPrototype/next/custom-regexpexec.js
@@ -0,0 +1,57 @@
+// 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 with a custom RegExp exec
+info: |
+  %RegExpStringIteratorPrototype%.next ( )
+    [...]
+    9. Let match be ? RegExpExec(R, S).
+
+  Runtime Semantics: RegExpExec ( R, S )
+    1. Assert: Type(R) is Object.
+    2. Assert: Type(S) is String.
+    3. Let exec be ? Get(R, "exec").
+    4. If IsCallable(exec) is true, then
+      a. Let result be ? Call(exec, R, « S »).
+      b. If Type(result) is neither Object or Null, throw a TypeError exception.
+      c. Return result.
+features: [Symbol.matchAll]
+---*/
+
+var regexp = /./g;
+var str = 'abc';
+var iter = regexp[Symbol.matchAll](str);
+
+var callArgs, callCount;
+function callNextWithExecReturnValue(returnValue) {
+  callArgs = undefined;
+  callCount = 0;
+
+  RegExp.prototype.exec = function() {
+    callArgs = arguments;
+    callCount++;
+    return returnValue;
+  }
+
+  return iter.next();
+}
+
+var firstExecReturnValue = ['ab'];
+var result = callNextWithExecReturnValue(firstExecReturnValue);
+assert.sameValue(result.value, firstExecReturnValue);
+assert(!result.done);
+
+assert.sameValue(callArgs.length, 1);
+assert.sameValue(callArgs[0], str);
+assert.sameValue(callCount, 1);
+
+result = callNextWithExecReturnValue(null);
+assert.sameValue(result.value, undefined);
+assert(result.done);
+
+assert.sameValue(callArgs.length, 1);
+assert.sameValue(callArgs[0], str);
+assert.sameValue(callCount, 1);
+
+reportCompare(0, 0);