RFR: 8339170: ☂ Convert tests to JUnit 5

[Andy Goryachev]

On Fri, 11 Apr 2025 20:36:48 GMT, Marius Hanl <mhanl at openjdk.org> wrote:

> These are the remaining bits and pieces in order to completely remove the JUnit Vintage Engine, and therefore JUnit 4 from JavaFX.
> After that, we should either document, that JUnit5 is used (just as information) or close [JDK-8296284](https://bugs.openjdk.org/browse/JDK-8296284) (Since you can not use JUnit4 anymore).
> 
> This also removes the `org.hamcrest` dependency, which is actually only used in one test where it can easily be replaced by a `Predicate` (instead of `Matcher`). I'm not convinced that we should keep that dependency for just one test.
> 
> Note: I could not get the `:swt` tests to compile/test, in order to run the tests. 
> I need some guidance here how to instruct `Gradle` to compile this module (and if I need anything else? like swt?).
> 
> Also, this probably needs an extra ticket in the JBS?

modules/javafx.swt/src/test/java/test/javafx/embed/swt/SWTCursorsTest.java line 44:

> 42: 
> 43:     @Rule
> 44:     public SwtRule ctx = new SwtRule();

this looks like a breaking change - what would be the junit5 equivalent of `@Rule`?

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PR Review Comment: https://git.openjdk.org/jfx/pull/1774#discussion_r2040300789