1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-symbol-typeerror.js b/js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-symbol-typeerror.js
new file mode 100644
index 0000000000..95e3e3fa38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-symbol-typeerror.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: Type error when "this" value is a Symbol
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  2. Let S be ? ToString(str).
+
+  ToString ( argument )
+  Argument Type: Symbol
+  Result: Throw a TypeError exception
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+assert.sameValue(typeof String.prototype.trimStart, "function");
+
+var trimStart = String.prototype.trimStart;
+var symbol = Symbol();
+
+assert.throws(
+  TypeError,
+  function() {
+    trimStart.call(symbol);
+  },
+  'String.prototype.trimStart.call(Symbol())'
+);
+
+reportCompare(0, 0);