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diff --git a/js/src/tests/test262/built-ins/isNaN/shell.js b/js/src/tests/test262/built-ins/isNaN/shell.js
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+++ b/js/src/tests/test262/built-ins/isNaN/shell.js
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+// GENERATED, DO NOT EDIT
+// file: isConstructor.js
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: |
+ Test if a given function is a constructor function.
+defines: [isConstructor]
+features: [Reflect.construct]
+---*/
+
+function isConstructor(f) {
+ if (typeof f !== "function") {
+ throw new Test262Error("isConstructor invoked with a non-function value");
+ }
+
+ try {
+ Reflect.construct(function(){}, [], f);
+ } catch (e) {
+ return false;
+ }
+ return true;
+}
+
+// file: nans.js
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+ A collection of NaN values produced from expressions that have been observed
+ to create distinct bit representations on various platforms. These provide a
+ weak basis for assertions regarding the consistent canonicalization of NaN
+ values in Array buffers.
+defines: [NaNs]
+---*/
+
+var NaNs = [
+ NaN,
+ Number.NaN,
+ NaN * 0,
+ 0/0,
+ Infinity/Infinity,
+ -(0/0),
+ Math.pow(-1, 0.5),
+ -Math.pow(-1, 0.5),
+ Number("Not-a-Number"),
+];