Headless glass platform

[jperedadnr]

Hi there, TestFX developers and users!

You might be aware of this open PR in the OpenJFX sandbox: openjdk/jfx-sandbox#2, a (WIP) PR to add a first class headless glass platform to OpenJFX.

See https://bugs.openjdk.org/browse/JDK-8324941 for a more detailed description, and see the mailing list thread: https://mail.openjdk.org/pipermail/openjfx-dev/2024-January/045030.html

We have some ongoing development, not yet upstreamed to the sandbox, under: https://github.com/jperedadnr/jfx-sandbox/tree/1-headless and we have some builds ready for those eager to test it:

• Windows x86_64: https://download2.gluonhq.com/openjfx/forks/jperedadnr/jfx-sandbox/openjfx-23+398_null_windows-x86_64_bin-sdk.zip
• Linux x86_64: https://download2.gluonhq.com/openjfx/forks/jperedadnr/jfx-sandbox/openjfx-23+395_null_linux-x86_64_bin-sdk.zip
• macOS x86_64: https://download2.gluonhq.com/openjfx/forks/jperedadnr/jfx-sandbox/openjfx-23+396_null_mac-x86_64_bin-sdk.zip
• macOS aarch64: https://download2.gluonhq.com/openjfx/forks/jperedadnr/jfx-sandbox/openjfx-23+397_null_mac-aarch64_bin-sdk.zip

Those links just have the latest JavaFX SDK 23-ea with the headless platform included.

In order to test this SDK with TestFX, we have forked it, and modified the build files to allow running with JDK 17+/JavaFX 17+, and then replaced the Monocle plaform with the new Headless platform. The changes are here: https://github.com/jperedadnr/TestFX/tree/headless

You can see that we have barely modified the code, and all the tests (500+) run just fine (except for capturing pixels/screen, not supported yet, and for awt tests).

Also as a quick test for others, we have this sample: https://github.com/jperedadnr/Example-TestFX/tree/headless that uses the SDK and a snapshot of TestFX that we have built and deployed to our Nexus for convenience.

It would be great if you could give it a try, and provide some feedback, either here, or to the open PR.

Thank you!

[mvsoder]

Oh wow! This is fantastic! I'll review things as I get a chance. I'm looking forward to Java 17+ support as well.

[credmond]

Thanks @jperedadnr! Will check this out and revert.