1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/isWellFormed/length.js b/js/src/tests/test262/built-ins/String/prototype/isWellFormed/length.js
new file mode 100644
index 0000000000..25dacc03cf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/isWellFormed/length.js
@@ -0,0 +1,24 @@
+// |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: >
+  String.prototype.isWellFormed.length value and descriptor.
+info: |
+  String.prototype.isWellFormed( )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+features: [String.prototype.isWellFormed]
+---*/
+
+verifyProperty(String.prototype.isWellFormed, 'length', {
+  configurable: true,
+  enumerable: false,
+  writable: false,
+  value: 0
+});
+
+reportCompare(0, 0);