1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/startsWith/searchstring-found-with-position.js b/js/src/tests/test262/built-ins/String/prototype/startsWith/searchstring-found-with-position.js
new file mode 100644
index 0000000000..bae9a17f2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/startsWith/searchstring-found-with-position.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 21.1.3.18
+description: >
+  Returns true if searchString appears as a substring of the given string with a
+  given position.
+info: |
+  21.1.3.18 String.prototype.startsWith ( searchString [ , position ] )
+
+  ...
+  11. Let len be the number of elements in S.
+  12. Let start be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. If searchLength+start is greater than len, return false.
+  15. If the sequence of elements of S starting at start of length searchLength
+  is the same as the full element sequence of searchStr, return true.
+  ...
+---*/
+
+var str = 'The future is cool!';
+
+assert(
+  str.startsWith('The future', 0),
+  'str.startsWith("The future", 0) === true'
+);
+assert(
+  str.startsWith('future', 4),
+  'str.startsWith("future", 4) === true'
+);
+assert(
+  str.startsWith(' is cool!', 10),
+  'str.startsWith(" is cool!", 10) === true'
+);
+
+reportCompare(0, 0);