世界上最簡單的 junit demo 程式

首先下在junit所需要的包，這裡就不多說了。

寫個類：

package untitled9;

import java.util.*;

public class SayHello {
  public SayHello() {
  }
  //測試函數
  public String[] split1(String str, String delim) {
    StringTokenizer st = new StringTokenizer(str, delim);
    int length = st.countTokens();
    String[] result = new String[length];
    for (int i = 0; i < length; i++) {
      result[i] = st.nextToken();
    }
    return result;
  }//end split1
  //多項測試函數
  public String[] split2(String str, String delim) {
    final int delimLength = delim.length();
    int pos = 0;
    int index = 0;
    ArrayList list = new ArrayList();

    while((index = str.indexOf(delim,pos)) != 1){
      list.add(str.substring(pos,index));
      pos = index + delimLength;
    }
    list.add(str.substring(pos));
    return ((String[])list.toArray((new String[0])));
  }//end split1
}

/**********************************************/
//以下是測試類別：

package untitled9;

import junit.framework.*;

public class TestSayHello
    extends TestCase {
  private SayHello sayHello = null;

  protected void setUp() throws Exception {
    super.setUp();
    sayHello = new SayHello();
  }

  protected void tearDown() throws Exception {
    sayHello = null;
    super.tearDown();
  }

  //單項測試函數
  public void testSplit() {
    SayHello shello = new SayHello();
    String str = "a,b,c";
    String delim = ",";

    String[] actualReturn = shello.split1(str, delim);

    /**@todo fill in the test code*/
    assertNotNull(actualReturn);
    assertEquals(3, actualReturn.length);
    assertEquals("a", actualReturn[0]);
    assertEquals("b", actualReturn[1]);
    assertEquals("c", actualReturn[2]);
  }
  public static void main(String[] args) {
    junit.swingui.TestRunner.run(TestSayHello.class);
  }
}

//編譯運行就可以了，簡單吧。