I have been writing a unit test for the connect module using the simpleTest module. The following is a discussion of my experiences. This article from Lullabot is what I mainly used as a reference. Note that if you are following this article be sure to read the comments at the bottom. Especially that hook_simpletest is not required.

Installing SimpleTest

In Drupal 5 simpleTest uses a PHP library for its testing. In later versions of Drupal this library is not used. Once you have finished downloading the simpleTest module read the INSTALL.txt file. The only extra step to configuring this module is to download the simpleTest PHP library and placing it in the ...all/modules/simpletest/simpletest directory.

General links

• Download the simpleTest Module here:  drupal.org/project/simpletest
• How to write your own test (Drupal 6.7): drupal.org/node/273612
• Unit Testing Group: groups.drupal.org/unit-testing
• Hack for SimpleTest(Browser) on Vista: http://drupal.org/node/304216
• ***Module Developers Guide to Simpletest: www.lullabot.com/articles/drupal-module-developer-guide-simpletest*** This is a great resource for black-box testing. Note to read comments, some of the article is out of date.
• Unit Tests: drupal.org/node/30008This is a good resource for white-box testing.

Here are some notes on the installation and configuration of the FCKEditor module in drupal 6.

Installation

fckEditor module
IMCE module (for file/image upload)

• When installing FCKEditor be sure to follow instructions in the README.txt file
• There is a good video which guides you through the install

Introduction:
This discussion references the upgrade process for cck_time module. One should look at the cck_time.module for Drupal 5 and Drupal 6 while reading the discussion of the functions and what they do.

Useful links:
Updating CCK Modules from 5.x to 6.x
CCK Handbook
Drupal 6 Form Api Reference