How to test Java Classes using JUnit5 and Reflection API

I have created a project which is intended to demonstrate the following using Java, Maven and JUnit5

• If the Class exists in project.
• If the class contains a method with a specific name
• If a method is public, private
• If a method contains parameters with specific types
• If a method returns a specific type

And there could be more additions to such a list.

This project makes use of ReflectionUtils class from Junit5 and Java's Reflection API

The codebase and tests are available at GitHub

Comments

[Sergiy Yevtushenko]

What is the purpose of such a tests?

[Harit Himanshu]

This is so that a learner can make progress on a certain set of tasks and verify their progress. The audience is developers learning java and creating their first project

[Stephen Nutbrown]

This sounds like a bad idea. Your tests should be checking that your unit of code meets it's external facing contracts; it should not need to assess the internal private methods and fields.

[Harit Himanshu]

That depends on the use case. This is so that a learner can make progress on a certain set of tasks and verify their progress. The audience is developers learning java and creating their first project