初识JUnit

package com.hugui.juint4;

public class T {

	public int add(int x, int y){
		return x + y;
	}
	
	public int divide(int x, int y){
		return x/y;
	}
	
}

//Errors表示程序出错，Failures表示结果测试出错
//运行多个测试

package com.hugui.juint4.test;

//静态引入(可以把那个类里面的静态方法引入进来),以前是import org.junit.*  但1.5之后用下面这种新的语法
import static org.junit.Assert.*;

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.hamcrest.Matchers.*;
import com.hugui.juint4.T;

public class TTest {
	
	/*
	 * 1.	@Test: 测试方法
		a)	(expected=XXException.class)
		b)	(timeout=xxx)
		2.	@Ignore: 被忽略的测试方法
		3.	@Before: 每一个测试方法之前运行
		4.	@After: 每一个测试方法之后运行
		5.	@BeforeClass: 所有测试开始之前运行
		6.	@AfterClass: 所有测试结束之后运行
	 * 
	 */
	
	//@BeforeClass: 所有测试开始之前运行，并且方法必须是static的
	@BeforeClass
	public static void beforeClass(){
		System.out.println("beforClass");
	}
	//@AfterClass: 所有测试结束之后运行，并且方法必须是static的
	@AfterClass
	public static void afterClass(){
		System.out.println("afterClass");
	}
	
	//@Before: 每一个测试方法之前运行
	@Before
	public void before(){
		System.out.println("before");
	}

	//加上Test注解,表示这是,能让jUnit运行时，会帮你一块儿运行
	@Test
	public void testAdd() {
//		/fail("Not yet implemented");
		int z = new T().add(3, 4);
		//判断结果是否是正确的
		assertEquals(7, z);
		
		assertTrue(z>3);
		
		//"z is too small"用来起提示作用
		assertTrue("z is too small", z >3);
		
		assertThat(z, is(7));
		//z要满足allOf里面的所有条件，greaterThan()表示比..大,lessThan()表示比..大
		assertThat(z, allOf(greaterThan(3), lessThan(10)));
		//是什么值都让他通过
		assertThat(z, anything());
		//z是不是接近7.0，误差不超过0.3,但是没有没有编译通过
		//assertThat(z, closeTo(7.0, 0.3));
		/*
		assertThat( n, allOf( greaterThan(1), lessThan(15) ) );
		assertThat( n, anyOf( greaterThan(16), lessThan(8) ) );
		assertThat( n, anything() );
		assertThat( str, is( "hugui" ) );
		assertThat( str, not( "hugui" ) );
		
		b)	assertThat( str, containsString( "hugui" ) );
		assertThat( str, endsWith("hugui" ) ); 
		assertThat( str, startsWith( "hugui" ) ); 
		assertThat( n, equalTo( nExpected ) ); 
		assertThat( str, equalToIgnoringCase( "hugui" ) ); 
		assertThat( str, equalToIgnoringWhiteSpace( "hugui" ) );
		
		c)	assertThat( d, closeTo( 3.0, 0.3 ) );
		assertThat( d, greaterThan(3.0) );
		assertThat( d, lessThan (10.0) );
		assertThat( d, greaterThanOrEqualTo (5.0) );
		assertThat( d, lessThanOrEqualTo (16.0) );
		
		d)	assertThat( map, hasEntry( "hugui", "hugui" ) );
		assertThat( iterable, hasItem ( "hugui" ) );
		assertThat( map, hasKey ( "hugui" ) );
		assertThat( map, hasValue ( "hugui" ) );
		
		*/
		
	}
	
	//expected表示不活什么异常，timeout表示下面代码要在多少时间内完成
	@Test(expected=java.lang.ArithmeticException.class, timeout=100)
	public void testDivide(){
		int z = new T().divide(8, 2);
		assertThat(z, is(4));
	}
	
	//@After: 每一个测试方法之后运行
	@After
	public void after(){
		System.out.println("after");
	}

}