Excavator: Migrate Groovy nebula test ConjureLocalPluginTest to the new Java Junit framework

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Changes produced by the roomba/migrate-gradle-testing-junit-framework check.

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🤖 🤖 This PR was created using Claude-code 🤖 🤖

Model: opus

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Claude Execution Message

Claude finished running successfully.

Migration complete. Here's a summary of what was done:

Files modified:

• gradle-conjure/src/test/groovy/com/palantir/gradle/conjure/ConjureLocalPluginTest.groovy - Added ***DELINEATOR FOR REVIEW comments before each method and Spock keywords (when:, then:, expect:)

Files created:

• gradle-conjure/src/test/java/com/palantir/gradle/conjure/ConjureLocalPluginTest.java - Migrated test with all 5 test methods
• gradle-conjure/src/test/java/com/palantir/gradle/conjure/TestVersions.java - Moved from groovy directory so Java tests can reference it
• test-migration-errors.md - Documents errors encountered and fixes applied

Key migration decisions:

1. Plugin application - apply plugin: 'com.palantir.conjure-local' replaced with .plugins().add("com.palantir.conjure-local")
2. standardBuildFile - Converted from a Groovy variable to a helper method returning GradleFile, using append() with format parameters for version interpolation
3. SubProject handling - Used rootProject.subproject("name") for tests that don't reference the SubProject variable (to avoid Error Prone's StrictUnusedVariable check); used SubProject parameter injection for tests that do use it
4. Assertions - Converted Spock implicit assertions to explicit assertThat() calls with .as() descriptions for file and output assertions
5. Task outcome checks - Converted result.tasks(TaskOutcome.FAILED)*.path.contains(...) to assertThat(result).task(":taskName").failed()

Claude Code Metrics

Metric	Value
Total cost	$3.18361175
Total Duration (API)	761602 ms
Total Duration (WALL)	788535 ms
Token usage	125 (input), 37219 (output)
Cached tokens	78996 (creation), 2792554 (read)

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Migration Notes

Test Migration Errors - ConjureLocalPluginTest

Error 1: TestVersions class not found during compilation

Error: cannot find symbol - variable TestVersions (7 occurrences)

Cause: TestVersions.java was located in src/test/groovy/ directory. The Java compiler (compileTestJava) only compiles sources in src/test/java/, so it could not resolve TestVersions referenced from the migrated Java test.

Fix: Moved TestVersions.java from src/test/groovy/com/palantir/gradle/conjure/ to src/test/java/com/palantir/gradle/conjure/. The Groovy compiler (compileTestGroovy) depends on compileTestJava output, so existing Groovy tests still compile successfully since they can reference the Java-compiled TestVersions class.

Error 2: StrictUnusedVariable Error Prone check for SubProject parameters

Error: [StrictUnusedVariable] The parameter 'java' is never read (and similar for postman)

Cause: Initially used SubProject java and SubProject postman as method parameters to create subprojects (mirroring the original addSubproject("java") / addSubproject("postman") calls). However, these SubProject variables were never read in the method bodies - they were only needed for the side effect of creating the subproject. The Palantir Error Prone StrictUnusedVariable check flagged these.

Fix: Replaced unused SubProject parameter injection with rootProject.subproject("name") calls inside the method body. This creates the subproject without introducing an unused parameter. Tests that DO use the SubProject variable (e.g., generate_conjure_generates_code_in_subprojects and supports_custom_postman_generator) kept SubProject parameter injection.

Second Pass Review Notes

• Verified all 5 test methods were migrated (none skipped)
• Verified .plugins().add("com.palantir.conjure-local") used instead of apply plugin: in text block
• Verified .as() descriptions are used on file assertions and output assertions where context is helpful
• Verified text blocks have no leading newlines
• Verified single .append() calls used (no multiple calls per block)
• Added blank line before // ***DELINEATOR FOR REVIEW: expect comment in custom_generator_throws_if_generator_missing for consistency with original formatting
• No additional changes were needed on the second pass review

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