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

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

A formatted diff between the old and new test has been generated at test-migration-notes/EnvironmentVariablesTest.html)
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🤖 🤖 This PR was created using Claude-code 🤖 🤖

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Claude Execution Message

Claude finished running successfully.

Perfect! The migration is complete. Let me provide a summary:

Migration Complete ✓

I have successfully migrated the EnvironmentVariablesTest from the Nebula/Groovy framework to the new Java-based testing framework. Here's what was done:

Summary of Changes:

1. Added delineator comments to the original Groovy file for review purposes
2. Created the new Java test file at /repo/environment-variables/src/test/java/com/palantir/gradle/utils/environmentvariables/EnvironmentVariablesTest.java
3. Successfully compiled the new test without any errors
4. Verified best practices - the test follows all guidelines from the testing guide

Key Migration Points:

• Class structure: Changed from extends IntegrationSpec to @GradlePluginTests annotation
• Test methods: Converted to snake_case Java method names with proper parameter injection
• Setup: Used @BeforeEach with RootProject parameter injection
• Build execution: Changed runTasksSuccessfully() to gradle.withArgs(...).buildsSuccessfully()
• Assertions: Migrated to fluent AssertJ-style assertions using assertThat(result).output().contains(...)
• Helper method: Created setupBuildFile() that returns GradleFile for potential chaining

Files Created/Modified:

1. ✅ /repo/environment-variables/src/test/groovy/com/palantir/gradle/utils/environmentvariables/EnvironmentVariablesTest.groovy - Added delineator comments
2. ✅ /repo/environment-variables/src/test/java/com/palantir/gradle/utils/environmentvariables/EnvironmentVariablesTest.java - New migrated test
3. ✅ /repo/test-migration-errors.md - Documentation of the migration process and learnings

The test compiled successfully on the first attempt and follows all best practices from the testing guide!

Claude Code Metrics

Metric	Value
Total cost	$0.31033645
Total Duration (API)	47
Total Duration (WALL)	8084
Token usage	136768 (input), 132446 (output)

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Migration Notes

Test Migration Notes - EnvironmentVariablesTest

Migration Summary

Successfully migrated EnvironmentVariablesTest.groovy to Java-based testing framework.

First Pass - Initial Migration

Changes Made:

1. Class structure: Changed from extends IntegrationSpec to @GradlePluginTests annotation
2. Test method names: Converted from Groovy string format to snake_case Java method names
   • 'can get testing variables' → can_get_testing_variables
   • 'isCircleNode0OrLocal returns true on circle node 0' → isCircleNode0OrLocal_returns_true_on_circle_node_0
   • etc.
3. Setup method: Converted Groovy def setup() to Java @BeforeEach void setup(RootProject project)
4. Build file setup: Created helper method setupBuildFile() that returns GradleFile (following guide pattern for reusable build file configurations)
5. Method invocations:
   • Changed runTasksSuccessfully('help') to gradle.withArgs("help").buildsSuccessfully()
   • Captured result as InvocationResult type
6. Assertions: Changed from Groovy assertions to fluent AssertJ-style assertions
   • stdout.contains("Variable: test") → assertThat(result).output().contains("Variable: test")
7. String formatting: Used Java text blocks ("""...""") for multi-line Gradle script content
8. Parameter injection: Added GradleInvoker gradle parameter to each test method

Issues Found: None

The test compiled successfully on the first attempt. The migration was straightforward because:

• The original test had a simple structure with no complex setup
• All tests followed the same pattern (run gradle, check output)
• No file manipulation beyond the build file
• No complex assertions

Second Pass - Best Practices Review

Review Against Testing Guide:

✅ Using @GradlePluginTests annotation correctly
✅ Parameter injection (GradleInvoker, RootProject) used appropriately
✅ .buildsSuccessfully() method used instead of old .build() method
✅ Fluent assertions with assertThat(result).output().contains(...) pattern
✅ Test names in snake_case format
✅ Delineator comments preserved for review
✅ Text blocks used for Gradle script content
✅ Helper method returns GradleFile for potential chaining (following guide pattern)

No Changes Needed

The test already follows all best practices from the testing guide. The helper method pattern matches the example in the guide where build file setup methods return GradleFile for potential further configuration.

Third Pass - Final Review

No additional issues found. The test is ready for use.

Key Learnings:

1. The setupBuildFile() helper method pattern is useful when the same build file content is used across multiple tests
2. Returning GradleFile from helper methods enables fluent API chaining even if not used in this specific test
3. Environment variable testing in the new framework uses the same pattern as the old framework (passing -P__TESTING=true and related properties)
4. The fluent assertion API makes output checking more readable than the old Groovy contains() method

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