Test Classes

• Test methods have names like testFoo

• Test results are verified by assertEquals()

• Test classes extend junit.framework.TestCase

• A simple test for addition:

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