Junit4

SimpleJunit4 Test

public class SimpleJunit {
    @Before public void setUp(){
         //such as initialize db connection
    }
    @Test public void test0(){
        assertEquals(1,1);
        assertNull(null); 
       //org.junit.Assert....
    }
    @After  public void teardown(){
        //such as close db connection
    }
}

junit4执行顺序

BeforeClass ->[Before->Test-After,Before->Test-After]->AfterClass

junit4的类变量，非static变量在每次Test都会恢复到类定义是的值

Private String var1=“123”;
Private static String var2=“345”;
@Test public void test0{System.out.println(var1); System.out.println(var2);
var1=“678”;var2=“789”};//123,345
@Test public void test1{System.out.println(var1); System.out.println(var2);//123,789

想一次测试多个用例
import org.junit.runner.RunWith;
import org.junit.runners.Suite.SuiteClasses;
import org.junit.runners.Suite;
@RunWith(value = Suite.class)
@SuiteClasses(value={ProductControllerTest.class, 
POPISpringTest.class })
public class SuiteTest{ }
也可右键包文件夹进行批量执行，但不能选择多个文件执行
忽略某个方法
@Ignore("暂时不测了")
@Test public void test0(){}
单独测试某个方法
右键点击方法名进行测试

Junit4Assert 一些常见的Assert

assertEquals(expect,actual);
assertEquals(double expect,double actual,double delta)
     可以在delta指定的差异范围内判断是否相等，如asserEquals(1,1.001,0.01) is true
      assertEquals(1,1.002,0.001) is false,because 1.002-1=0.002>0.001
assertEquals([message],expect,actual);
     message 会在不等的情况下输出，如assertEquals("It's wrong", 1, 0);
     //It's wrong expected:<1> but was:<0>
assertSame(expect,actual) 是通过 expect == actual 判断的
assertThat([String reason], T actual,Matcher<T> matcher)
     Matcher是由 Hamcest提供的一套匹配符，它更接近自然语言，可读性高，更加灵活
     如assertThat(“Junit is a wonderfull tool", StringContains.containsString("C#")); is false
fail
    多用于发生异常时

hamcrest Matcher

assertThat("C#",org.hamcrest.core.IsEqual.equalTo("C#"));
assertThat("C# is a wonderful language",org.hamcrest.core.StringEndsWith.endsWith("language"));
assertThat(5,org.hamcrest.core.AllOf.allOf(org.hamcrest.number.OrderingComparison.greaterThan(6), org.hamcrest.number.OrderingComparison.lessThan(8)));

其他的可以“点”出来，不知道怎么用的最好还是看看源代码