Dealing with Java - Multimedia Introduction to Programming Using Java - page 476

Test t= new Test();
t.testInstance()
The first line creates an instance of class Test and stores its name in a new vari-
able t . The second line calls t 's function testInstance , which yields 5 .

I.2.3 Javadoc

DrJava has a facility for creating and displaying Javadoc comments. Click the
item Javadoc on the right of the tool bar at the top of the DrJava window. A nav-
igation window appears, which asks you to select a folder into which the Javadoc
files will be placed. We suggest that you create a new folder titled “doc” within
the folder for the project you are working with and select it. After you select the
folder, DrJava creates the Javadoc files —be patient; it can take a few moments.
Finally, a new window will appear with the Javadoc spec in it, in the same for-
mat as the Java API specifications.

I.2.4 Using JUnit in DrJava

The application JUnit is designed to facilitate the testing of Java programs. JUnit
can be used in many contexts; here, we show how to use it in DrJava.
We use as an example the testing of function max of class SimpleMath in
Fig. I.2, which is assumed to be in file SimpleMath.java . We have deliberately

public class SimpleMath {
/** = maximum of x and y */
public static int max( int x, int y) {
if (x <= y)
{ return y - 1; }
return x;

}

}

import junit.framework.TestCase;
public class TestMax extends TestCase {
public void testXBigger()
{ assertEquals(7, SimpleMath.max(7, 5)); }

public void testYBigger()
{ assertEquals(5, SimpleMath.max(-5, 5)); }

public void testXYSame()
{ assertEquals(8, SimpleMath.max(8, 8)); }

}
Figure I.2:

Using JUnit to test method max