1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-not-obj-coercible.js b/js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-not-obj-coercible.js
new file mode 100644
index 0000000000..a4529c288a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-not-obj-coercible.js
@@ -0,0 +1,24 @@
+// 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: The "this" value must be object-coercible
+info: |
+  1. Let O be ? RequireObjectCoercible(this value).
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+var trimStart = String.prototype.trimStart;
+
+assert.sameValue(typeof trimStart, 'function');
+
+assert.throws(TypeError, function() {
+  trimStart.call(undefined);
+}, 'undefined');
+
+assert.throws(TypeError, function() {
+  trimStart.call(null);
+}, 'null');
+
+reportCompare(0, 0);