source: trip-planner-front/node_modules/is-arguments/test/index.js

'use strict';

var test = require('tape');
var isArguments = require('../');
var hasToStringTag = require('has-tostringtag/shams')();

test('primitives', function (t) {
        t.notOk(isArguments([]), 'array is not arguments');
        t.notOk(isArguments({}), 'object is not arguments');
        t.notOk(isArguments(''), 'empty string is not arguments');
        t.notOk(isArguments('foo'), 'string is not arguments');
        t.notOk(isArguments({ length: 2 }), 'naive array-like is not arguments');
        t.end();
});

test('arguments object', function (t) {
        t.ok(isArguments(arguments), 'arguments is arguments');
        t.notOk(isArguments(Array.prototype.slice.call(arguments)), 'sliced arguments is not arguments');
        t.end();
});

test('old-style arguments object', function (t) {
        var isLegacyArguments = isArguments.isLegacyArguments || isArguments;
        var fakeOldArguments = {
                callee: function () {},
                length: 3
        };
        t.ok(isLegacyArguments(fakeOldArguments), 'old-style arguments is arguments');
        t.end();
});

test('Symbol.toStringTag', { skip: !hasToStringTag }, function (t) {
        var obj = {};
        obj[Symbol.toStringTag] = 'Arguments';
        t.notOk(isArguments(obj), 'object with faked toStringTag is not arguments');

        var args = (function () {
                return arguments;
        }());
        args[Symbol.toStringTag] = 'Arguments';
        t.notOk(isArguments(obj), 'real arguments with faked toStringTag is not arguments');

        t.end();
});