source: imaps-frontend/node_modules/es-shim-unscopables/test/index.js

'use strict';

var test = require('tape');
var inspect = require('object-inspect');
var v = require('es-value-fixtures');
var forEach = require('for-each');
var hasOwn = require('hasown');

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

var sortSymbols = function (a, b) {
        return inspect(a).localeCompare(inspect(b));
};

test('shimUnscopables', function (t) {
        t.equal(typeof shimUnscopables, 'function', 'is a function');

        forEach(v.nonStrings, function (notNonEmptyString) {
                t['throws'](
                        function () { shimUnscopables(notNonEmptyString); },
                        TypeError,
                        inspect(notNonEmptyString) + ' is not a non-empty String'
                );
        });

        t['throws'](
                function () { shimUnscopables('x'); },
                TypeError,
                inspect('x') + ' is not on Array.prototype'
        );

        t.test('no symbols', { skip: typeof Symbol === 'function' }, function (st) {
                st.doesNotThrow(function () { shimUnscopables('forEach'); });

                st.end();
        });

        t.test('symbols, no unscopables', { skip: typeof Symbol !== 'function' || Symbol.unscopables }, function (st) {
                st.deepEqual(Object.getOwnPropertySymbols(Array.prototype), [Symbol.iterator]);

                shimUnscopables('forEach');

                st.deepEqual(Object.getOwnPropertySymbols(Array.prototype), [Symbol.iterator]);

                st.end();
        });

        t.test('Symbol.unscopables', { skip: typeof Symbol !== 'function' || !Symbol.unscopables }, function (st) {
                st.deepEqual(
                        Object.getOwnPropertySymbols(Array.prototype).sort(sortSymbols),
                        [Symbol.iterator, Symbol.unscopables]
                );
                st.notOk(hasOwn(Array.prototype[Symbol.unscopables], 'forEach'), 'unscopables map lacks forEach');

                shimUnscopables('forEach');

                st.deepEqual(
                        Object.getOwnPropertySymbols(Array.prototype).sort(sortSymbols),
                        [Symbol.iterator, Symbol.unscopables]
                );
                st.equal(Array.prototype[Symbol.unscopables].forEach, true, 'unscopables map has forEach');

                st.end();
        });

        t.end();
});