node_modules/object-inspect/test/fn.js

var inspect = require('../');
var test = require('tape');

test('function', function (t) {
    t.plan(1);
    var obj = [1, 2, function f(n) { return n; }, 4];
    t.equal(inspect(obj), '[ 1, 2, [Function: f], 4 ]');
});

test('function name', function (t) {
    t.plan(1);
    var f = (function () {
        return function () {};
    }());
    f.toString = function toStr() { return 'function xxx () {}'; };
    var obj = [1, 2, f, 4];
    t.equal(inspect(obj), '[ 1, 2, [Function (anonymous)] { toString: [Function: toStr] }, 4 ]');
});

test('anon function', function (t) {
    var f = (function () {
        return function () {};
    }());
    var obj = [1, 2, f, 4];
    t.equal(inspect(obj), '[ 1, 2, [Function (anonymous)], 4 ]');

    t.end();
});