35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
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'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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