testFramework

Test fixtures and base classes for this plugin's own tests. Not shipped — it is consumed as testImplementation project(':testFramework') and does not appear in the distribution ZIP.

It also vendors copies of IntelliJ Platform test infrastructure (Gradle importing test cases, SDK test helpers, EEL test utilities) that the platform does not publish in a consumable form.

Grails version support

Not applicable: this code targets the IntelliJ Platform test framework, not Grails.

Gotcha: test data is resolved from the working directory

GrailsTestUtil.getTestRootPath() resolves paths with new File(""), i.e. the test JVM's working directory, which Gradle defaults to the project directory of the project that owns the test task:

public static String getTestRootPath(String directory) {
  return FileUtil.toSystemIndependentName(new File("").getAbsoluteFile() + directory);
}

Roughly 25 test classes call getTestRootPath("/testdata/..."). testdata/ must therefore live in the project that owns the tests. Do not “fix” this by setting test { workingDir = ... } — that hides the coupling rather than removing it.

Build

Kotlin is still required here: 16 of the vendored platform files are Kotlin and are deliberately kept as-is so future platform upgrades can be reconciled against upstream.