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5093c3037d
* Reject exceptional input to `isConstructor` Prior to this commit, the `isConstructor` harness function would return `false` when invoked with a value that lacked a [[Call]] internal method. While it's true that such values are not constructors, there are no tests which benefit from using `isConstructor` to make such an assertion. Extend `isConstructor` to throw an error when invoked with a non-function object. Update a test which was misleadingly invoking the function with the value `undefined`. * fixup! Reject exceptional input to `isConstructor`
22 lines
514 B
JavaScript
22 lines
514 B
JavaScript
// Copyright (C) 2017 André Bargull. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: |
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Test if a given function is a constructor function.
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defines: [isConstructor]
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---*/
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function isConstructor(f) {
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if (typeof f !== "function") {
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throw new Test262Error("isConstructor invoked with a non-function value");
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}
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try {
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Reflect.construct(function(){}, [], f);
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} catch (e) {
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return false;
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}
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return true;
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}
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