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34 lines
1.1 KiB
34 lines
1.1 KiB
'use strict'; |
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var test = require('tape'); |
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var getDunderProto = require('../get'); |
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test('getDunderProto', { skip: !getDunderProto }, function (t) { |
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if (!getDunderProto) { |
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throw 'should never happen; this is just for type narrowing'; // eslint-disable-line no-throw-literal |
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} |
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// @ts-expect-error |
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t['throws'](function () { getDunderProto(); }, TypeError, 'throws if no argument'); |
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// @ts-expect-error |
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t['throws'](function () { getDunderProto(undefined); }, TypeError, 'throws with undefined'); |
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// @ts-expect-error |
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t['throws'](function () { getDunderProto(null); }, TypeError, 'throws with null'); |
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t.equal(getDunderProto({}), Object.prototype); |
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t.equal(getDunderProto([]), Array.prototype); |
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t.equal(getDunderProto(function () {}), Function.prototype); |
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t.equal(getDunderProto(/./g), RegExp.prototype); |
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t.equal(getDunderProto(42), Number.prototype); |
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t.equal(getDunderProto(true), Boolean.prototype); |
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t.equal(getDunderProto('foo'), String.prototype); |
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t.end(); |
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}); |
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test('no dunder proto', { skip: !!getDunderProto }, function (t) { |
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t.notOk('__proto__' in Object.prototype, 'no __proto__ in Object.prototype'); |
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t.end(); |
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});
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