1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/at/length.js b/js/src/tests/test262/built-ins/TypedArray/prototype/at/length.js
new file mode 100644
index 0000000000..acd90fd31c
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+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/at/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.at
+description: >
+  TypedArray.prototype.at.length value and descriptor.
+info: |
+  %TypedArray%.prototype.at( index )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js, testTypedArray.js]
+features: [TypedArray.prototype.at]
+---*/
+assert.sameValue(
+  typeof TypedArray.prototype.at,
+  'function',
+  'The value of `typeof TypedArray.prototype.at` is "function"'
+);
+
+assert.sameValue(
+  TypedArray.prototype.at.length, 1,
+  'The value of TypedArray.prototype.at.length is 1'
+);
+
+verifyNotEnumerable(TypedArray.prototype.at, 'length');
+verifyNotWritable(TypedArray.prototype.at, 'length');
+verifyConfigurable(TypedArray.prototype.at, 'length');
+
+reportCompare(0, 0);