source: frontend/node_modules/own-keys/test/index.js

'use strict';

var test = require('tape');
var hasSymbols = require('has-symbols/shams')();
var hasPropertyDescriptors = require('has-property-descriptors')();

var ownKeys = require('../');

/** @type {(a: PropertyKey, b: PropertyKey) => number} */
function comparator(a, b) {
        if (typeof a === 'string' && typeof b === 'string') {
                return a.localeCompare(b);
        }
        if (typeof a === 'number' && typeof b === 'number') {
                return a - b;
        }
        return typeof a === 'symbol' ? 1 : -1;
}

test('ownKeys', function (t) {
        t.equal(typeof ownKeys, 'function', 'is a function');
        t.equal(
                ownKeys.length,
                1,
                'has a length of 1'
        );

        t.test('basics', function (st) {
                var obj = { a: 1, b: 2 };
                if (hasPropertyDescriptors) {
                        Object.defineProperty(obj, 'c', {
                                configurable: true,
                                enumerable: false,
                                writable: true,
                                value: 3
                        });
                }

                st.deepEqual(
                        ownKeys(obj).sort(comparator),
                        (hasPropertyDescriptors ? ['a', 'b', 'c'] : ['a', 'b']).sort(comparator),
                        'includes non-enumerable properties'
                );

                st.end();
        });

        t.test('symbols', { skip: !hasSymbols }, function (st) {
                /** @type {Record<PropertyKey, unknown>} */
                var obj = { a: 1 };
                var sym = Symbol('b');
                obj[sym] = 2;

                var nonEnumSym = Symbol('c');
                Object.defineProperty(obj, nonEnumSym, {
                        configurable: true,
                        enumerable: false,
                        writable: true,
                        value: 3
                });

                st.deepEqual(
                        ownKeys(obj).sort(comparator),
                        ['a', sym, nonEnumSym].sort(comparator),
                        'works with symbols, both enum and non-enum'
                );

                st.end();
        });

        t.end();
});