CSSE 375 BORG Test Insertion Assignment

Table of Contents

1 Introduction

This is an exercise designed to familiarize you with the techniques in Michael Feather's book, chapter 9 and 10.

In particular, you will probably want to use:

  • Extract Interface (362)
  • Extract Method (415)
  • Subclass and Override Method (401)

2 The Code

This code is taken from the BORG Java Calendar project (https://mikeberger.github.io/borg_calendar/). This is not the complete project, because building it requires some complicated libraries and is a pain. It also has been modified s lightly to reduce the difficulty of the assignment, but it is still fairly realistic.

You should be able to get the code from your svn repo.

Take a look at this file: [src/net/sf/borg/model/EmailReminder.java]

This is code designed to send daily reminder emails with a summary of the day's activities. Your goal will be to test the sendEmail method.

3 Installing lombok

So I've discovered that the BORG project requires an external library to be installed on your eclipse. I didn't notice because it was already installed on mine. The library to want to install is lombok. You can probably install it by simply double clicking on the lombok.jar included with your project download and installing it on your eclipse.

If you have permission problems, it may be that you have to run it as administrator. To do that:

  1. Type cmd in your windows search bar
  2. Right click the Cmd.exe that should come up and select Run As Administrator
  3. At the command line type
    java -jar C:\Wherever\lombok.jar"

    then proceed with the install from there.

Once your install lombok you must also:

  • Restart eclipse
  • Clean your project (Project -> Clean… -> Select BORGEmail and click OK)

If you have trouble, stop by and see me!

4 Your Assignment

Write a unit test for the send email method. Of course this test should not actually send email. Your test should test two things:

  1. Test that when multiple email addresses are specified in the form "email1@foo.com,email2@foo.com", the system sends 2 messages (not one message to a bogus address).
  2. Ensure that the first line of the appointment text is included in the message body.

You should change the sendEmail method and other parts of the code as little as possible, but you can change them. Use automated UI refactoring tools as much as possible to ensure your change does not introduce much risk.

You should not need to use a Mocking framework or any other specialized testing tool beyond jUnit.

Write your test code + any classes you add to the system in the (already created) package yourCodeGoesHere.

5 How to Submit your Code

You will submit via SVN.

6 Grading

If your test works and the rest of the code is only slightly modified you should get 10/10.

If the test works but the code seems greatly changed, 6/10.

If you were unable to get the code under test but clearly made an attempt along the lines of Feather's approach, 4/10.

7 Something to be careful of

Under no circumstances should you be copying code from the original function under test into your your testing classes. For example, here's an incorrect approach that was submitted:

private class TestingEmailReminder extends EmailReminder {

        public ArrayList<String> appointmentTexts;
        public ArrayList<String> emailAddresses;
        public int emailsSent;

        public TestingEmailReminder(AppointmentModelInterface appointments) {
                this.appointmentTexts = new ArrayList<String>();
                this.emailAddresses = new ArrayList<String>();
                this.emailsSent = 0;

        protected String addAppointmentText(String tx, Appointment appt) {
                if (appt.isEncrypted())
                        tx += Resource.getResourceString("EncryptedItemShort");
                else {
                        // only show first line of appointment text
                        String s = appt.getText();
                        int ii = s.indexOf('\n');
                        if (ii != -1) {
                                tx += s.substring(0, ii);
                        } else {
                                tx += s;
                return tx;

//even more copied code below this

See how addAppointmentText basically has code copied from EmailReminder? This is very bad. Why? Because the test implies that it tests the original code, but actually it is testing a copy of the original code in a test class. If the original code changes (perhaps gets a bug added) this test won't detect it because it is still testing the code in the test class.

This is a lot different than something like:

public class TestingClass extends RealClass {
    protected int displayIntegerEntryPopupDialog() {
        return 4;

Because the goal of the test is not to check that the dialog displays correctly. In the BORGEmail case, our goal is to ensure that the email's contents are correct which means we need to test the real code for that. But it is not our goal to ensure that SendJavaMail.sendMail works - so we can pull out that part if necessary.

Author: Buffalo

Created: 2015-05-12 Tue 09:41

Emacs 24.4.1 (Org mode 8.2.10)