JUnit4 基本用法實例

本教程介紹了在JUnit4中支持的基本註解。

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

/**
* @author yiibai
*
*/
public class JunitTest1 {

private Collection collection;

@BeforeClass
public static void oneTimeSetUp() {
    // one-time initialization code   
    System.out.println("@BeforeClass - oneTimeSetUp");
}

@AfterClass
public static void oneTimeTearDown() {
    // one-time cleanup code
    System.out.println("@AfterClass - oneTimeTearDown");
}

@Before
public void setUp() {
    collection = new ArrayList();
    System.out.println("@Before - setUp");
}

@After
public void tearDown() {
    collection.clear();
    System.out.println("@After - tearDown");
}

@Test
public void testEmptyCollection() {
    assertTrue(collection.isEmpty());
    System.out.println("@Test - testEmptyCollection");
}

@Test
public void testOneItemCollection() {
    collection.add("itemA");
    assertEquals(1, collection.size());
    System.out.println("@Test - testOneItemCollection");
}

}

運行結果：

@BeforeClass - oneTimeSetUp
@Before - setUp
@Test - testEmptyCollection
@After - tearDown
@Before - setUp
@Test - testOneItemCollection
@After - tearDown
@AfterClass - oneTimeTearDown

在JUnit 4中，必須聲明「@BeforeClass」和「@AfterClass」的方法是靜態方法。