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Design, construction, & unit testing

Software Engineering

Semester ProjectChih-Hong Jeng & Farn Wang

fall 2006

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Deadline and what you need to prepare

Deadline: 2006/11/21 (by Prof. Wang’s schedule)

It seems to be difficult to finish it on time You have to ask for sure.

What you need to prepare for submission: A demonstration of your current progress, i.e.,

your program must run in some way… A written report specifying your functionalities,

a brief manual. Your code, your test data.

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Implementation

Problems relating to Rational Rose®: Lack of integration with current software

developing IDE. You have to write your code outside Rose®. When you use Java as your developing

platform, the code generation and reverse engineering requires IBM VisualAge

VisualAge is totally out of date, but you can still find it.

Not included in IBM Academic Initiative, use trial version.

Now everyone uses Eclipse, Netbeans, Jbuilder or… Rational Software Architect support the integration

of Java into Eclipse.

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So…

If you are using Java platform, I encourage you to switch your platform into IBM XDE developer for Java. It has Eclipse bundled in it. Although it remains an older product. But I’m trying to import Rose project into XDE

What about the one using C++?

Yes, it supports the translation from model to standard C++ and Visual C++ 6.0

But I think that you will not use those old tools.

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Good Gospel!

You may use what ever IDE you like to implement your code. Use UML as your guideline toward your

implementation. As you submit your code, you may have to

spend some time describing the relation between your code and your diagram.

But make sure that you perform unit testing.

In Java, this is achieved by using JUnit.

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JUnit

JUnit is a testing framework. By applying the tools it offered, you may reduce the probability writing “wrong” test programs. It’s a tool enabling you to perform unit testing

with ease. You don’t have to use

“system.out.println(“”);” It has been bundled in various IDEs.

Java NetBeans, Borland JBuilder, Eclipse… In JUnit you have to "Keep the bar green

to keep the code clean."

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Using JUnit to check correctness:Sample GCD calculator

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A glance of Netbeans IDE

Appearance of Appearance of windowwindow

Main part of calculating Main part of calculating GCDGCD

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GCD.java

public class GCD { /** Creates a new instance of GCD */ public GCD() { } public int use_gcd(int num1, int num2) { int r = 0; while(num2 != 0) { r = num1 % num2; num1 = num2; num2 = r; } return num1;

} }

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We want to generate JUnit test case template of GCD.java

Tools Create JUnit tests

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The content of GCDTest.java (All these contents are generated automatically)

Modify it based on your understanding of the GCD module!

// Assertion: Check if the expected result and generated result are the same!

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A simple modification of test cases

Note that all these fixtures can be managed. Visit www.Junit.org for more!

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Execute the Unit Test

When the word is green, it means that it passes;

When the word is red, it means that it fails.

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End