source: imaps-frontend/node_modules/has-proto/test/mutator.js

'use strict';

var test = require('tape');
var gPO = require('reflect.getprototypeof/polyfill')();
var gOPD = require('gopd');

var hasProto = require('../');
var hasProtoMutator = require('../mutator');

var getter = require('dunder-proto/get');

test('hasProtoMutator', function (t) {
        var result = hasProtoMutator();
        t.equal(typeof result, 'boolean', 'returns a boolean (' + result + ')');

        var obj = { __proto__: null };
        if (result) {
                t.notOk('toString' in obj, 'null object lacks toString');
                t.equal(gPO(obj), null);
                if (gOPD && getter) {
                        t.equal(getter(obj), null);
                }
        } else if (hasProto()) {
                t.notOk('toString' in obj, 'null object lacks toString');
                if (gOPD && getter) {
                        t.equal(getter(obj), null);
                }
        } else {
                t.ok('toString' in obj, 'without proto, null object has toString');
                t.equal(gPO(obj), Object.prototype);
        }

        t.end();
});