[Enhancement]: JUnit 4 to JUnit 5 migration

[nagkumar]

Module

Core

Proposal

Currently this code of an example

https://github.com/testcontainers/testcontainers-java/tree/main/examples/redis-backed-cache

Upgrade examples to JUnit 5, currently the code uses junit 4

[nagkumar]

Observe the annotations and imports, all are junit 4

even the gradle dependency shows it as junit 4.x

[eddumelendez]

Thanks for raising this issue, @nagkumar. Would you like to contribute and update our examples with JUnit 5?

[nagkumar]

Thanks for raising this issue, @nagkumar. Would you like to contribute and update our examples with JUnit 5?

Sure @eddumelendez , if you could help me with your further thoughts to achieve this I can follow the same, such as which first few examples to start with.

Also, let me know your views on the following too

1. if you want to retain JUnit4 along with new JUnit5 examples
2. even to upgrade gradle groovy scripts to gradle kotlinDSLs too.
3. Upgrade all the dependencies in gradle script up to date versions.
4. Which version of JDK can I use JDK 19 or 20
5. Should change be certified on Win or Linux (if yes WSL2 way fine)

[eddumelendez]

• even to upgrade gradle groovy scripts to gradle kotlinDSLs too.

• Upgrade all the dependencies in gradle script up to date versions.

Those are no goals of the issue

if you want to retain JUnit4 along with new JUnit5 examples

Let's just use one, in this case JUnit 5.

The order doesn't matter :) If you want to submit them all at once is ok or if do you prefer one by one, it is also ok. Just let us know here so others watching can consider it.

[nagkumar]

What is the purpose of

testcontainers-java\docs\examples as compared to testcontainers-java\examples

i.e. example code within docs folder

Code what is in examples seem to retain boh Junit 4 and 5, any case as per your previous view, we shall just having just Junit 5 post this migration.

[nagkumar]

I would recommend upgrading of all the dependencies to the latest as we can avoid compatibility issues and some dependency's latest versions may more actively support junit 5 than junit 4.

[nagkumar]

• even to upgrade gradle groovy scripts to gradle kotlinDSLs too.

• Upgrade all the dependencies in gradle script up to date versions.

Those are no goals of the issue

if you want to retain JUnit4 along with new JUnit5 examples

Let's just use one, in this case JUnit 5.

The order doesn't matter :) If you want to submit them all at once is ok or if do you prefer one by one, it is also ok. Just let us know here so others watching can consider it.

Can you pl. review my PR for this migration #6950 (comment)

eddumelendez also like to know if you have any timeline to pull this to main?

[nagkumar]

Please do the code review and kindly let me know if I could close this from myside, as I wish to get away from repeat work due to delays - I do see code is changing rapidly, and conflict resolving can be a big time waste for all of us.