junit3 和 jnuit4　的一些小区别 demo-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_203/article/details/81954355

本文通过两个具体的测试类，展示了 JUnit 3 和 JUnit 4 的使用方法。包括测试用例的设置、多种测试方法如容量测试、元素查找及移除等，并介绍了异常测试的实践。

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package org.junit.samples;

import java.util.ArrayList;
import java.util.List;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

/**
* A sample test case, testing {@link java.util.Vector}.
* 必须继承TestCase
*/
public class ListTest3 extends TestCase {
protected List<Integer> fEmpty;
protected List<Integer> fFull;

public static void main(String[] args) {
junit.textui.TestRunner.run(suite());
}

@Override
protected void setUp() {
  fEmpty = new ArrayList<Integer>();
  fFull = new ArrayList<Integer>();
  fFull.add(1);
  fFull.add(2);
  fFull.add(3);
}

public static Test suite() {

//just test for junit3
return new TestSuite(ListTest.class);
}

//测试方法必须以test开头

public void testCapacity() {
  int size = fFull.size();
  for (int i = 0; i < 100; i++)
   fFull.add(new Integer(i));
  assertTrue(fFull.size() == 100 + size);
}

public void testContains() {
assertTrue(fFull.contains(1));
assertTrue(!fEmpty.contains(1));
}

public void testElementAt() {
int i = fFull.get(0);
assertTrue(i == 1);

  try {
   fFull.get(fFull.size());
  } catch (IndexOutOfBoundsException e) {
   return;
  }
  fail("Should raise an ArrayIndexOutOfBoundsException");
}

public void testRemoveAll() {
  fFull.removeAll(fFull);
  fEmpty.removeAll(fEmpty);
  assertTrue(fFull.isEmpty());
  assertTrue(fEmpty.isEmpty());
}

public void testRemoveElement() {
fFull.remove(new Integer(3));
assertTrue(!fFull.contains(3));
}
}

package org.junit.samples;

import org.junit.*;
import org.junit.junitfaq.SimpleTest4;

import static org.junit.Assert.*;
import java.util.*;

import junit.framework.TestSuite;

/**
* A sample test case, testing {@link java.util.Vector}.
*
*/
public class ListTest4 {
protected List<Integer> fEmpty;
protected List<Integer> fFull;

public static void main(String[] args) {
// junit.textui.TestRunner.run(suite());
org.junit.runner.JUnitCore.main("org.junit.samples.ListTest4");
}

// suite for junit4
public static junit.framework.Test suite() {
return new junit.framework.JUnit4TestAdapter(ListTest4.class);
}

// suite for junit3
// public static Test suite() {
// return new TestSuite(ListTest4.class);
// }

@Before 此处必须是public
public void setUp() {
  fEmpty = new ArrayList<Integer>();
  fFull = new ArrayList<Integer>();
  fFull.add(1);
  fFull.add(2);
  fFull.add(3);
}

@Test
public void testCapacity() {
  int size = fFull.size();
  for (int i = 0; i < 100; i++)
   fFull.add(new Integer(i));
  assertTrue(fFull.size() == 100 + size);
}

@Test
public void testContains() {
assertTrue(fFull.contains(1));
assertTrue(!fEmpty.contains(1));
}

@Test
public void testElementAt() {
int i = fFull.get(0);
assertTrue(i == 1);

  try {
   fFull.get(fFull.size());
  } catch (IndexOutOfBoundsException e) {
   return;
  }
  fail("Should raise an ArrayIndexOutOfBoundsException");
}

@Test
public void testRemoveAll() {
  fFull.removeAll(fFull);
  fEmpty.removeAll(fEmpty);
  assertTrue(fFull.isEmpty());
  assertTrue(fEmpty.isEmpty());
}

@Test
public void testRemoveElement() {
fFull.remove(new Integer(3));
assertTrue(!fFull.contains(3));
}
}

junit4 下异常的测试

@Test(expected=IndexOutOfBoundsException.class)
public void testIndexOutOfBoundsException() {
  ArrayList emptyList = new ArrayList();
  Object o = emptyList.get(0);
  assertEquals(0, collection.size());
}

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