在Eclipse外应用JUnit测试

Eclipse IDE 集成了JUnit开源单元测试框架。如果不借助Eclipse的图形界面工具来生成并运行我们的JUnit测试，该怎么实现呢？

1. 首先需要在类路径下添加JUnit-4.X jar 包。

2. 编写需要测试的方法。

public class Calculator {	private Calculator(){}		public static int add(int x, int y) {		return x + y;  // 正确	}		public static int subtract(int x,int y) {		return y - x;  // 错误	}		public static int multiply(int x, int y) {		throw new RuntimeException(); // 抛出异常	}		public static int divide(int x, int y) {		return x / y;  // divided by 0	}		public static int module(int x , int y) {		for(;;); //死循环	}}

import static org.junit.Assert.*;import org.junit.After;import org.junit.Before;import org.junit.Test;import static org.zjut.junit.Calculator.*;public class CalculatorTest {	@Before	public void setUp() throws Exception {		System.out.println("Before testing");	}	@After	public void tearDown() throws Exception {		System.out.println("After testing");	}	@Test	public void testAdd() {		assertEquals("add", 3, add(1, 2));	}	@Test	public void testSubtract() {		assertEquals("subtract", 3, subtract(5, 2));	}	@Test	public void testMultiply() {		assertEquals("multiply", 9, multiply(3, 3));	}	@Test(expected = ArithmeticException.class)	public void testDivide() {		divide(3, 0);	}	@Test(timeout=200)	public void testModule() {		module(1, 2);	}}

public class Main {	public static void main(String[] args) {		Result result = JUnitCore.runClasses(CalculatorTest.class);		for(Failure failure : result.getFailures()) {			System.out.println(failure.getMessage());			//System.out.println(failure.getTrace());			//System.out.println(failure.getException());			//System.out.println(failure.getDescription());		}	}}

Before testingAfter testingBefore testingAfter testingBefore testingAfter testingBefore testingAfter testingBefore testingAfter testingsubtract expected:<3> but was:<-3>nulltest timed out after 200 milliseconds