recipe produces not compiling code during JFall preconference workshop

[nicenemo]

What version of OpenRewrite are you using?

Latest provided by the maven plugin ran from the commandline

How are you running OpenRewrite?

During a Workshop at the JFall preconference I migrated an old toy project, Jnoaber, from Java 8 to Java 25.
For this I used gemini CLI.
It compiles and it runs. See [this Branch] (https://github.com/nicenemo/jnoaber/tree/improved_testing)

Next I ran the following recipe with the mvn commandline:

mvn -U org.openrewrite.maven:rewrite-maven-plugin:run -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-testing-frameworks:RELEASE -Drewrite.activeRecipes=org.openrewrite.java.testing.junit5.JUnit5BestPractices -Drewrite.exportDatatables=true

I don't include openrewrite plugins in my pom.xml.

This gave the following message:

[INFO] Printing available datatables to: target/rewrite/datatables/2025-11-05_14-33-24-904
[WARNING] Changes have been made to src/test/java/eu/hanskruse/noaber/test/ComposeTest.java by:
[WARNING]     org.openrewrite.java.testing.junit.JupiterBestPractices
[WARNING]         org.openrewrite.java.testing.cleanup.RemoveTestPrefix
[WARNING]         org.openrewrite.java.testing.cleanup.TestsShouldNotBePublic
[WARNING] Changes have been made to src/test/java/eu/hanskruse/noaber/test/EitherTest.java by:
[WARNING]     org.openrewrite.java.testing.junit.JupiterBestPractices
[WARNING]         org.openrewrite.java.testing.junit5.CleanupAssertions
[WARNING]             org.openrewrite.java.testing.cleanup.AssertEqualsBooleanToAssertBoolean
[WARNING]             org.openrewrite.java.testing.cleanup.AssertNotEqualsBooleanToAssertBoolean
[WARNING]         org.openrewrite.java.testing.cleanup.TestsShouldNotBePublic
[WARNING] Changes have been made to src/test/java/eu/hanskruse/noaber/test/PatternMatchingTest.java by:
[WARNING]     org.openrewrite.java.testing.junit.JupiterBestPractices
[WARNING]         org.openrewrite.java.testing.cleanup.TestsShouldNotBePublic
[WARNING] Changes have been made to src/test/java/eu/hanskruse/noaber/test/RightAppliedTest.java by:
[WARNING]     org.openrewrite.java.testing.junit.JupiterBestPractices
[WARNING]         org.openrewrite.java.testing.cleanup.RemoveTestPrefix
[WARNING]         org.openrewrite.java.testing.cleanup.TestsShouldNotBePublic
[WARNING] Changes have been made to src/test/java/eu/hanskruse/noaber/test/StreamableTest.java by:
[WARNING]     org.openrewrite.java.testing.junit.JupiterBestPractices
[WARNING]         org.openrewrite.java.testing.cleanup.RemoveTestPrefix
[WARNING]         org.openrewrite.java.testing.cleanup.TestsShouldNotBePublic
[WARNING] Changes have been made to src/test/java/eu/hanskruse/noaber/test/TupleTest.java by:
[WARNING]     org.openrewrite.java.testing.junit.JupiterBestPractices
[WARNING]         org.openrewrite.java.testing.cleanup.RemoveTestPrefix
[WARNING]         org.openrewrite.java.testing.cleanup.TestsShouldNotBePublic
[WARNING]         org.openrewrite.java.testing.junit5.AssertTrueInstanceofToAssertInstanceOf
[WARNING] Please review and commit the results.
[WARNING] Estimate time saved: 14m

This does not compile because an import for assertInstanceOf is now missing in the TupleTest.java class.

I checked in the failing code here

[timtebeek]

Thanks for the report! Linking the likely test here for context:
https://github.com/nicenemo/jnoaber/blob/bbbd51f754d9a665bbccf11374bb58188a72d055/src/test/java/eu/hanskruse/noaber/test/TupleTest.java#L408-L412

    final Tuple tail = sut.tail();
    if (sut instanceof Tuple1) {
      assertTrue(tail instanceof Tuple0);
      return;
    }