Introduce additional tests for support of generics

[sbrannen]

Overview

Issues #333, #976, and #978 addressed the topics of generics and overridden methods in various ways; however, as conjectured in #978, we may still have lingering bugs in this regard.

Dedicated test class

ReflectionUtilsWithGenericTypeHierarchiesTests contains a set of interesting and some unclear cases.

Deliverables

For each of the following, introduce additional tests across multiple-level class hierarchies using generic interfaces, generic abstract classes, etc.

In other words, try to break the search algorithms.

• ReflectionUtils.findMethod(*)
• ReflectionUtils.findMethods(*)

[sbrannen]

This issue is up for grabs in case anyone in the community wants to take a stab at breaking our reflection utilities. 😉

PRs with failing tests are extremely welcome!

[SeriyBg]

@sbrannen, I cannot build the project with gradle.

A problem occurred evaluating root project 'junit5'.
> Could not find method runJunit4() for arguments [true] on object of type org.junit.gen5.gradle.JUnitExtension.

Am I missing something or doing something wrong?

[sbrannen]

You're using the alpha version of JUnit 5.

We just released 5.0 M6, and 5.0 RC1 work is being performed in master.

[sbrannen]

If you perform a fresh git clone https://github.com/junit-team/junit5.git, everything should build just fine.