assertDataWasCopied.php

<?php
    /**
     * Asserts that all data in the fields of $from is present in $to,
     * except don't care about $exceptFields in $from.
     *
     * Works with private fields. Ignores static fields. Ignores empty fields.
     *
     * This is useful as a basic sanity check that data was copied without
     * asserting it field-by-field, which is error-prone.
     * If a new field appears in the source object, the test breaks and forces
     * you to consider it.
     *
     * @todo Support $from and $to being arrays.
     * 
     * @param object $from
     * @param object $to
     * @param array $exceptFields
     */
    protected function assertDataWasCopied($from, $to, $exceptFields = [])
    {
        // ...
    }