• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.0
• Operating System version: macos
• Java version: 1.8

functions

1. Upgrade junit to junit 5
2. Upgrade the test cases

Why do this ?

• Some new features：test extensions 、Future of JVM testing、easier parameterized tests
• Java 8 lambda support
• Optimized api
• Basically compatible with junit4

Please read the referenced article 《7 reasons why you should start using JUnit 5 today》

How to write junit5 test case ?

Please see 《JUnit 5 User Guide》 : https://junit.org/junit5/docs/current/user-guide/