Provide JUnit 5 GrpcTestExtension

What version of gRPC are you using?

1.18.0

What did you expect to see?

In order to be able to test with JUnit 5 I would like to have a comparable solution like GrpcCleanupRule but as JUnit 5 extension.

Example

In my PoC project mmichaelis/poc-grpc you may see an example, which is very similar to your GrpcCleanupRule (because that was my intention 😄): In module grpc-test you will find the class GrpcTestExtension and an example usage in HelloServiceImplTest.

Help wanted?

I may assist in adding this to the grpc-java project, but there are several questions:

• First of all: Do you like the extension?
• Where to place the JUnit 5 extension? Into testing module? Or an extra module?
• And if it is an extra module: How to share code? My intention would be to refactor GrpcCleanupRule, so that GrpcTestExtension and the JUnit 4 rule share as much code as possible.

[creamsoup]

personally i would like to use junit5. but, internally we only have junit 4.12. junit5 requires pretty big change, so unfortunately it won’t happen any time in near future.

[asarkar]

@marcphilipp Added to the “JUnit Jupiter Extensions” section.