Software testing (Junit3 JUNIT4)

1. Overview

2. Software Testing

3. The JUnit framework

4. Assert

5, TestCase class

6. Create the Tested class

 package com.ljb.junit;/** *  tested Class (import Junit.jar)  *  @author  ljb * @ version 2015 March 13  */public class Calculator { //  Results  private  static int result;  //   public void add  (int n )   {  result += n; }  //  minus  public void minus  (int  n)  {  result -= n; }  //  by  public void mult   (int n)  {  result *= n; }  //  except  public void  div  (int n)  {  if  (n == 0)  {    SYSTEM.OUT.PRINTLN ("Divisor cannot be 0!");   } else {   result /= n;  }  //  zeroing  public void clear  ()  {  result = 0; }  //  Obtain the result of the Operation &NBsp;public int getresult  ()  {  return result; }} 

7, creating test classes

package com.ljb.junit;import junit.framework.assert;import junit.framework.testcase;/** *   Create tested Classes  *  @author  LJB *  @version  2015 March 13  */public class  calculatortest extends testcase { //  creating a tested class object  Calculator calc =  New calculator ();  protected void setup ()  throws Exception {   Super.setup ();   system.out.println ("Pre-Test ...");   calc.clear (); } protected  Void teardown ()  throws exception {  super.teardown ();   System.out.println ("After test ...");  } public void testadd ()  {  calc.add (3);   calc.add (2);   int result = calc.getresult ();   assert.assertequals (5,  result);  } public void testminus ()  {  calc.minus (1);   Calc.minus (2);   int resulT = calc.getresult ();   assert.assertequals ( -3, result);  } public void  testmult ()  {  calc.add (1);   calc.mult (2);   int result =  calc.getresult ();   assert.assertequals (2, result); } public void  Testdiv ()  {  calc.add (5);   calc.div (2);  int result =  Calc.getresult ();   system.out.println (result);   assert.assertequals (2, result);  }}

Note: Removing an assert is also possible because TestCase inherits the Assert class

Operation Result:

Before the test ...
After the test ...
Before the test ...
After the test ...
Before the test ...
After the test ...
Before the test ...
2
After the test ...
8, Junit4 commonly used annotations

9. Abnormal test

10. Time Test

Software testing (Junit3 JUNIT4)