1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/built-ins/String/prototype/substr/length-negative.js b/js/src/tests/test262/annexB/built-ins/String/prototype/substr/length-negative.js
new file mode 100644
index 0000000000..48e90b1aac
--- /dev/null
+++ b/js/src/tests/test262/annexB/built-ins/String/prototype/substr/length-negative.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-string.prototype.substr
+es6id: B.2.3.1
+description: Behavior when "length" is a negative number
+info: |
+    [...]
+    7. Let resultLength be min(max(end, 0), size - intStart).
+    8. If resultLength ≤ 0, return the empty String "".
+---*/
+
+assert.sameValue('abc'.substr(0, -1), '', '0, -1');
+assert.sameValue('abc'.substr(0, -2), '', '0, -2');
+assert.sameValue('abc'.substr(0, -3), '', '0, -3');
+assert.sameValue('abc'.substr(0, -4), '', '0, -4');
+
+assert.sameValue('abc'.substr(1, -1), '', '1, -1');
+assert.sameValue('abc'.substr(1, -2), '', '1, -2');
+assert.sameValue('abc'.substr(1, -3), '', '1, -3');
+assert.sameValue('abc'.substr(1, -4), '', '1, -4');
+
+assert.sameValue('abc'.substr(2, -1), '', '2, -1');
+assert.sameValue('abc'.substr(2, -2), '', '2, -2');
+assert.sameValue('abc'.substr(2, -3), '', '2, -3');
+assert.sameValue('abc'.substr(2, -4), '', '2, -4');
+
+assert.sameValue('abc'.substr(3, -1), '', '3, -1');
+assert.sameValue('abc'.substr(3, -2), '', '3, -2');
+assert.sameValue('abc'.substr(3, -3), '', '3, -3');
+assert.sameValue('abc'.substr(3, -4), '', '3, -4');
+
+reportCompare(0, 0);