| 1 | 'use strict';
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| 2 |
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| 3 | var test = require('tape');
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| 4 |
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| 5 | var getProto = require('../');
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| 6 |
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| 7 | test('getProto', function (t) {
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| 8 | t.equal(typeof getProto, 'function', 'is a function');
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| 9 |
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| 10 | t.test('can get', { skip: !getProto }, function (st) {
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| 11 | if (getProto) { // TS doesn't understand tape's skip
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| 12 | var proto = { b: 2 };
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| 13 | st.equal(getProto(proto), Object.prototype, 'proto: returns the [[Prototype]]');
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| 14 |
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| 15 | st.test('nullish value', function (s2t) {
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| 16 | // @ts-expect-error
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| 17 | s2t['throws'](function () { return getProto(undefined); }, TypeError, 'undefined is not an object');
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| 18 | // @ts-expect-error
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| 19 | s2t['throws'](function () { return getProto(null); }, TypeError, 'null is not an object');
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| 20 | s2t.end();
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| 21 | });
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| 22 |
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| 23 | // @ts-expect-error
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| 24 | st['throws'](function () { getProto(true); }, 'throws for true');
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| 25 | // @ts-expect-error
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| 26 | st['throws'](function () { getProto(false); }, 'throws for false');
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| 27 | // @ts-expect-error
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| 28 | st['throws'](function () { getProto(42); }, 'throws for 42');
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| 29 | // @ts-expect-error
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| 30 | st['throws'](function () { getProto(NaN); }, 'throws for NaN');
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| 31 | // @ts-expect-error
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| 32 | st['throws'](function () { getProto(0); }, 'throws for +0');
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| 33 | // @ts-expect-error
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| 34 | st['throws'](function () { getProto(-0); }, 'throws for -0');
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| 35 | // @ts-expect-error
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| 36 | st['throws'](function () { getProto(Infinity); }, 'throws for ∞');
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| 37 | // @ts-expect-error
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| 38 | st['throws'](function () { getProto(-Infinity); }, 'throws for -∞');
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| 39 | // @ts-expect-error
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| 40 | st['throws'](function () { getProto(''); }, 'throws for empty string');
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| 41 | // @ts-expect-error
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| 42 | st['throws'](function () { getProto('foo'); }, 'throws for non-empty string');
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| 43 | st.equal(getProto(/a/g), RegExp.prototype);
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| 44 | st.equal(getProto(new Date()), Date.prototype);
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| 45 | st.equal(getProto(function () {}), Function.prototype);
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| 46 | st.equal(getProto([]), Array.prototype);
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| 47 | st.equal(getProto({}), Object.prototype);
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| 48 |
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| 49 | var nullObject = { __proto__: null };
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| 50 | if ('toString' in nullObject) {
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| 51 | st.comment('no null objects in this engine');
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| 52 | st.equal(getProto(nullObject), Object.prototype, '"null" object has Object.prototype as [[Prototype]]');
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| 53 | } else {
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| 54 | st.equal(getProto(nullObject), null, 'null object has null [[Prototype]]');
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| 55 | }
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| 56 | }
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| 57 |
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| 58 | st.end();
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| 59 | });
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| 60 |
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| 61 | t.test('can not get', { skip: !!getProto }, function (st) {
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| 62 | st.equal(getProto, null);
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| 63 |
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| 64 | st.end();
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| 65 | });
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| 66 |
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| 67 | t.end();
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| 68 | });
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