1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.replace/subst-before.js b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.replace/subst-before.js
new file mode 100644
index 0000000000..71d88fb145
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.replace/subst-before.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    Substitution pattern: text before match
+es6id: 21.2.5.8
+info: |
+    16. Repeat, for each result in results,
+        [...]
+        m. If functionalReplace is true, then
+           [...]
+        n. Else,
+           i. Let replacement be GetSubstitution(matched, S, position,
+              captures, replaceValue).
+        [...]
+
+    21.1.3.14.1 Runtime Semantics: GetSubstitution
+
+    Code units: 0x0024, 0x0060
+
+    Unicode Characters: $`
+
+    Replacement text:
+    If position is 0, the replacement is the empty String. Otherwise the
+    replacement is the substring of str that starts at index 0 and whose last
+    code unit is at index `position-1`.
+features: [Symbol.replace]
+---*/
+
+assert.sameValue(/a/[Symbol.replace]('abc', '[$`]'), '[]bc');
+assert.sameValue(/b/[Symbol.replace]('abc', '[$`]'), 'a[a]c');
+
+reportCompare(0, 0);