source: imaps-frontend/node_modules/functions-have-names/test/index.js

'use strict';

var test = require('tape');

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

test('named functions', function (t) {
        function f() {} // eslint-disable-line func-style
        var g = function h() {};

        t.equal(typeof hasNames, 'function', 'is a function');
        t.equal(hasNames(), f.name === 'f' && g.name === 'h', 'functions have names or not as expected');

        t.end();
});

var oDP = Object.defineProperty;
if (oDP) {
        try {
                oDP({}, 'a', { value: 1 });
        } catch (e) {
                oDP = null;
        }
}

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

        if (hasNames()) {
                var fn = function f() {};
                if (oDP) {
                        try {
                                oDP(fn, 'name', { configurable: true, value: 'foo' });
                        } catch (e) {}
                        if (fn.name === 'f') {
                                t.equal(hasNames.functionsHaveConfigurableNames(), false, 'function names are not configurable');
                        } else if (fn.name === 'foo') {
                                t.equal(hasNames.functionsHaveConfigurableNames(), true, 'function names are not configurable');
                        } else {
                                t.fail('functions have names, but something surprising has happened. Please report this!');
                        }
                } else {
                        t.equal(hasNames.functionsHaveConfigurableNames(), false, 'function names are not configurable');
                }
        } else {
                t.equal(hasNames.functionsHaveConfigurableNames(), false, 'functions do not have names');
        }

        t.end();
});

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

        var fn = function f() {};
        if (typeof fn.bind !== 'function') {
                t.equal(hasNames.boundFunctionsHaveNames(), false, 'bound functions do not have names, because .bind does not exist');
        } else if (hasNames()) {
                t.equal(hasNames.boundFunctionsHaveNames(), fn.bind().name !== '', 'bound functions have names');
        } else {
                t.equal(hasNames.boundFunctionsHaveNames(), false, 'bound functions do not have names, because none do');
        }

        t.end();
});