1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/isWellFormed/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/String/prototype/isWellFormed/return-abrupt-from-this.js
new file mode 100644
index 0000000000..5796e786f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/isWellFormed/return-abrupt-from-this.js
@@ -0,0 +1,25 @@
+// |reftest| shell-option(--enable-well-formed-unicode-strings) skip-if(!String.prototype.isWellFormed||!xulRuntime.shell) -- String.prototype.isWellFormed is not enabled unconditionally, requires shell-options
+// Copyright (C) 2022 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-string.prototype.iswellformed
+description: >
+  Return abrupt from RequireObjectCoercible(this value).
+info: |
+  String.prototype.isWellFormed( )
+
+  1. Let O be ? RequireObjectCoercible(this value).
+
+features: [String.prototype.isWellFormed]
+---*/
+assert.sameValue(typeof String.prototype.isWellFormed, 'function');
+
+assert.throws(TypeError, function () {
+  String.prototype.isWellFormed.call(undefined);
+}, '`String.prototype.isWellFormed.call(undefined)` throws TypeError');
+
+assert.throws(TypeError, function () {
+  String.prototype.isWellFormed.call(null);
+}, '`String.prototype.isWellFormed.call(null)` throws TypeError');
+
+reportCompare(0, 0);