Junit4 Quick Start

1 What is xUnit

xUnit is a test framework based on test-driven development

pythonUnit for python testing

CppUnit for C++ testing

JUnit for java testing

 

2. What is JUnit

Junit is a framework for testing Java code.

 

3 Why use JUnit

Purposeful testing helps us avoid bugs in our code.

 

Four junit official website

http://junit.org/junit4/

jar package download address:

https://github.com/junit-team/junit4/wiki/Download-and-Install

 

Five examples

1. Create the junit4Demo project with the eclipse project.

2. Create the caculate.java program

1. package com.imooc.util;
3. publicclassCaculate{
4. publicint add(int a,int b){
5. return a+b;
6. }
7. publicint subtract(int a,int b){
8. return a-b;
9. }
10. publicint multiply(int a ,int b){
11. return a*b;
12. }
13. publicint divide(int a,int b){
14. return a/b;
15. }
17. }

3. Import the jar package of Junit

选择 junit4Demo，右键【Build Path】->【Add library】->【JUnit】->【Next】->【JUnit4】->【Finish】

4. Create test code

Select the com.imooc.util package, right-click [new] -> [Junit Test Case].

Name it CaculateTest.

code show as below

1. package com.imooc.util;
2. importstatic org.junit.Assert.*;
4. import org.junit.Test;
7. publicclassCaculateTest{
8. @Test
9. publicvoid add(){
10. assertEquals(6,newCaculate().add(3,3));
11. }
12. }

5. Execute the test

Right click【 CaculateTest.java 】->【Run as】->【Junit test】

6. Execution results