org.junit.runners.model. InvalidTestClassError: Invalid test class ‘com.zhj.esdemo. MysqlTests‘: 1.

One 、 error message ：

org.junit.runners.model.InvalidTestClassError: Invalid test class 'com.zhj.esdemo.MysqlTests':
  1. Method mapperUse() should be public

Two 、 Troubleshooting and common causes

My unit test class is written like this ,@SpringBootTest The notes are ,@Test Also have ,@Autowired Also have

Then look carefully at this error message , Guess yes MysqlTest This name is illegal

After changing the name, it still doesn't work

2.1 One @Test’ Method called another @Test Method

The reason why this blogger is also wrong is In a belt @Test Method to adjust another belt @Test The key word method This exception occurs

The solution is simple , Remove the called method @Test Just fine

2.2 Guide Package error ,org.junit.Test That's right

The wrong package ....

The reason for this is the use of org.junit.jupiter.api.Test

You should use org.junit.Test That's right