1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/built-ins/String/prototype/fontsize/this-val-tostring-err.js b/js/src/tests/test262/annexB/built-ins/String/prototype/fontsize/this-val-tostring-err.js
new file mode 100644
index 0000000000..9bb7b11da6
--- /dev/null
+++ b/js/src/tests/test262/annexB/built-ins/String/prototype/fontsize/this-val-tostring-err.js
@@ -0,0 +1,24 @@
+// 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.fontsize
+es6id: B.2.3.8
+description: Abrupt completion when coercing "this" value to string
+info: |
+    B.2.3.2.1 Runtime Semantics: CreateHTML
+
+    1. Let str be ? RequireObjectCoercible(string).
+    2. Let S be ? ToString(str).
+---*/
+
+var thisVal = {
+  toString: function() {
+    throw new Test262Error();
+  }
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.fontsize.call(thisVal);
+});
+
+reportCompare(0, 0);