firefly-iii/app/tests/factories/Limit.php

<?php
use Carbon\Carbon;
use League\FactoryMuffin\Facade;

Facade::define(
    'Limit',
    [

        'component_id' => 'factory|Budget',
        'startdate'    => function () {
                $start = new Carbon;
                $start->startOfMonth();

                return $start;
            },
        'amount'       => 100,
        'repeats'      => 'boolean',
        'repeat_freq'  => function () {
                $frequencies = ['daily', 'weekly', 'monthly', 'quarterly', 'half-year', 'yearly'];

                return $frequencies[rand(0, 5)];
            }


    ]
);