Exercise 1: Compile and run the simple addition test

• For simplicity put junit.jar and commons-lang-2.1.jar from the lib directory into a new empty directory.

• Put this code into a file named FractionTest.java in that same directory:

  import junit.framework.TestCase;
  import org.apache.commons.lang.math.*;
  
  public class FractionTest extends TestCase {
  
      public void testAddition() {
        
          Fraction half = Fraction.getFraction(2, 4);
          Fraction fourth = Fraction.getFraction(1, 4);
          
          Fraction actual = half.add(fourth);
          Fraction expected = Fraction.getFraction(3, 4);
          assertEquals(expected, actual);
          
      }
      
  }

• Compiling:

  $ javac -classpath junit.jar:commons-lang-2.1.jar FractionTest.java

• Running:

  $ java -classpath .:junit.jar:commons-lang-2.1.jar junit.swingui.TestRunner FractionTest