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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`
33 lines
1.2 KiB
JavaScript
33 lines
1.2 KiB
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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Including isConstructor.js will expose one function:
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isConstructor
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includes: [isConstructor.js]
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features: [generators, Reflect.construct]
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---*/
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assert.sameValue(typeof isConstructor, "function");
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assert.throws(Test262Error, () => isConstructor(), "no argument");
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assert.throws(Test262Error, () => isConstructor(undefined), "undefined");
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assert.throws(Test262Error, () => isConstructor(null), "null");
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assert.throws(Test262Error, () => isConstructor(123), "number");
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assert.throws(Test262Error, () => isConstructor(true), "boolean - true");
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assert.throws(Test262Error, () => isConstructor(false), "boolean - false");
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assert.throws(Test262Error, () => isConstructor("string"), "string");
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assert.throws(Test262Error, () => isConstructor({}), "Object instance");
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assert.throws(Test262Error, () => isConstructor([]), "Array instance");
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assert.sameValue(isConstructor(function(){}), true);
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assert.sameValue(isConstructor(function*(){}), false);
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assert.sameValue(isConstructor(() => {}), false);
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assert.sameValue(isConstructor(Array), true);
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assert.sameValue(isConstructor(Array.prototype.map), false);
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