1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/at/index-non-numeric-argument-tointeger-invalid.js b/js/src/tests/test262/built-ins/TypedArray/prototype/at/index-non-numeric-argument-tointeger-invalid.js
new file mode 100644
index 0000000000..e3f65c143d
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+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/at/index-non-numeric-argument-tointeger-invalid.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: >
+  Property type and descriptor.
+info: |
+  %TypedArray%.prototype.at( index )
+
+  Let relativeIndex be ? ToInteger(index).
+
+includes: [testTypedArray.js]
+features: [TypedArray, TypedArray.prototype.at]
+---*/
+assert.sameValue(
+  typeof TypedArray.prototype.at,
+  'function',
+  'The value of `typeof TypedArray.prototype.at` is "function"'
+);
+
+testWithTypedArrayConstructors(TA => {
+  assert.sameValue(typeof TA.prototype.at, 'function', 'The value of `typeof TA.prototype.at` is "function"');
+  let a = new TA([0,1,2,3]);
+
+  assert.throws(TypeError, () => {
+    a.at(Symbol());
+  }, '`a.at(Symbol())` throws TypeError');
+});
+
+reportCompare(0, 0);