Properly disable APT execution for test sources when using KAPT #1386
Description
Problem
When running a test that creates module canvases via Documenter the Javadoc is not visible because the annotation processor from spring-modulith-apt runs for our test sources as well which overrides the javadoc.json.
We are using Kotlin and our test sources are located in src/test/kotlin. Because we are also using Gradle, the APT is configured with Kapt:
kapt("org.springframework.modulith:spring-modulith-apt:1.4.3")
When running the test, the SpringModulithProcessor is executed via Gradle's kaptKotlin and afterwards by kaptTestKotlin. Both extract Javadoc into build/generated-spring-modulith/javadoc.json whereas the second task effectively overwrites the javadoc.json from the first run.
Solution
As far as I see the SpringModulithProcessor should not run for test executions at all. The problem seems to be simply BuildSystemUtils.getTestTarget() which checks the Java path build/classes/java/test but not build/classes/kotlin/test.
Workaround
With enabled Gradle caching, I can first execute the gradle kaptKotlin task, followed by the gradle test task. This prevents the kaptTestKotlin task from running and ensures that the javadoc.json file remains unchanged. The Javadoc is then included in the canvas documentation.