Hello! Thanks for this effort Harald. I really like the motivation.

I took a look at the PoC and tried to run it with Podman (IIRC officially unsupported by TestContainers so mileage may vary). It took up to 30 seconds to initialize containers already downloaded from quay.io for a test class. I'm also not a big fan of a common parent class for each test class and I would prefer to have an additional few lines of code in each test class. Otherwise it runs fine.

Thanks to having multiple Maven modules with tests it is currently possible to parallelize the run of individual modules in Jenkins matrix configuration. Is it possible to download all needed containers in a preparation step to not have to do this in every matrix configuration? Initialization like this would add some execution time to the test run.

IMHO it is hard to say if stability will improve in the usual large scale HAL tests are running in. Jenkins nodes we use are virtualized. I can imagine that using TestContainers may improve stability in terms of dependencies - now we would be sure browser and VNC are always present and properly configured but that's not a common problem from my experience. How would using TestContainers improve stability?

If all the changes you mentioned are aimed only at upstream (since you mention GH actions and TeamCity), would it be possible to still run tests without TestContainers?

Does the TestContainers solution suppose to replace existing testsuite?

Thanks!

On Mon, Jan 31, 2022 at 7:43 PM Harald Pehl <hpehl@redhat.com> wrote:

TLDR;

I've setup a PoC [1] for an alternative way to test the HAL management console.
The PoC is based on Testcontainers [2], Arquillian [3] and JUnit 5. Although
this is primarily intended for UI testing, the usage of Testcontainers could
also be interesting for the WildFly test suite.

---

The existing HAL test suite [4] is a rich test suite for the HAL management
console. It contains 300+ UI tests based on Arquillian [3].

The UI tests require a browser and a running WildFly instance as an execution
environment. This makes is hard to run the tests on a CI server. Another issue
is that the tests are not very stable and often run into timeouts. To execute
the complete test suite you need a stable environment.

Recently I came across Testcontainers [2], which provide a nice API to start
arbitrary containers before / after (all) unit tests. The library also provides
an elegant way to start and use browsers in remote web containers.

Therefore, I decided to implement a PoC which provides an alternative and
more stable way to test the HAL management console. Tests are self
contained and can run in CI environments such as GH Actions or Teamcity.

At the same time the new approach has to be compatible with the existing test
suite. Tests should be runnable w/o major code changes using the new approach.

The result is [1]. If you're interested, feel free to take a look and let me
know what you think!

---
[1] https://github.com/hpehl/manatoko
[2] https://www.testcontainers.org/
[3] http://arquillian.org/arquillian-graphene/
[4] https://github.com/hal/testsuite.next
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