package com.lt.Demo.TestDemo;import java.util.Arrays;import java.util.Collection;import org.junit.After;import org.junit.AfterClass;import org.junit.Before;import org.junit.BeforeClass;import org.junit.Test;import org.junit.runner.RunWith;import org.junit.runners.Parameterized;import org.junit.runners.Parameterized.Parameters;import static org.junit.Assert.*;@RunWith(Parameterized.class)public class CalculatorTest {    private int param;    private int result;    @Parameters    public static Collection data() {        return Arrays.asList(new Object[][] { { 2, 4 }, { 0, 0 }, { -3, 9 }, });    }        Calculator calculator = new Calculator();    public CalculatorTest(int param,int result) {        this.param = param;        this.result = result;        System.out.println("构造函数被调用");    }    @BeforeClass    public static void testBeforeClass() {        System.out.println("BeforeClass");    }        @Before    public void init() throws ArithmeticException {        System.out.println("BeforeMethod");        calculator.clear();    }    @Test    public void testPlusSelf()    {                calculator.PlusSelf(param);        assertEquals(result, calculator.getResult());        System.out.println("testPlusSelf：use data");            }        @Test    public void testAdd() {        int a = 10;        int b = 100;        calculator.add(a, b);        int expectAnswer = 110;        System.out.println("testAdd：not use data");        assertEquals(expectAnswer, calculator.getResult());    }        @After    public void testAfter() {        System.out.println("AfterMethod");    }        @AfterClass    public static void testAfterClass() {        System.out.println("AfterClass");    }    }

BeforeClass构造函数被调用BeforeMethodtestPlusSelf：use dataAfterMethod构造函数被调用BeforeMethodtestAdd：not use dataAfterMethod构造函数被调用BeforeMethodtestPlusSelf：use dataAfterMethod构造函数被调用BeforeMethodtestAdd：not use dataAfterMethod构造函数被调用BeforeMethodAfterMethod构造函数被调用BeforeMethodtestAdd：not use dataAfterMethodAfterClass