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

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

Is this right? TestDependencyVersionsTaskSpec.html

A formatted diff between the old and new test can be viewed here

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

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Claude Execution Message

Claude finished running successfully.

Excellent! The migration is complete and successful. Let me now create a summary of what was accomplished:

Migration Summary

I have successfully migrated the test class TestDependencyVersionsTaskSpec.groovy to TestDependencyVersionsTaskTest.java. Here's what was done:

✅ Completed Tasks

1. Added delineator comments to the original Groovy test file to help reviewers compare the old and new implementations.

2. Migrated the test class from Groovy/Spock to Java/JUnit 5:

   • Changed from extending AbstractTestingPluginSpec to using @GradlePluginTests annotation
   • Converted test method names to snake_case format
   • Replaced Spock's setup() with JUnit's @BeforeEach
   • Replaced runTasksSuccessfully() with gradle.withArgs().buildsSuccessfully()
   • Created a helper method applyStandardBuildWithoutGcv() to replace the build file variable from the Groovy version
   • Used TestDependencyVersions.version() API directly instead of static imports
   • Used fluent properties file API instead of the old TestContentHelpers.addVersionsToPropsFile()

3. Fixed compilation errors:

   • Corrected the file assertion pattern to use projectFile.assertThat() instead of assertThat(file)
   • Changed from storing File objects to ArbitraryFile objects
   • Fixed import statements to use the correct framework packages

4. Applied best practices from the testing guide:

   • Used fluent API chaining with proper formatting
   • Used the structured plugins() API for adding plugins
   • Used propertiesFile().appendProperty() for properties files
   • Maintained all original comments including delineators
   • Used text blocks for multi-line strings

📝 Documentation

Created test-migration-errors.md documenting:

• All errors encountered during migration
• Solutions applied
• Discovery methods used to find solutions

✅ Verification

The migrated test compiles successfully with ./gradlew :gradle-plugin-testing:compileTestJava.

Claude Code Metrics

Metric	Value
Total cost	$0.9088358000000002
Total Duration (API)	134
Total Duration (WALL)	12938
Token usage	290990 (input), 336522 (output)

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Migration Notes

Test Migration Errors and Solutions

This document tracks errors encountered during the migration of TestDependencyVersionsTaskSpec.groovy to TestDependencyVersionsTaskTest.java.

Initial Migration Phase

Error 1: Incorrect assertion method for File objects

Problem: Used assertThat(outputFile) from GradlePluginTestAssertions with a File object, which is not supported.

// Incorrect
assertThat(outputFile).exists();

Error Message:

error: no suitable method found for assertThat(File)
    method GradlePluginTestAssertions.assertThat(TaskOutcome) is not applicable
    method GradlePluginTestAssertions.assertThat(InvocationResult) is not applicable

Solution: Changed from storing a File object to storing an ArbitraryFile (which is returned by project.buildDir().file()), and used its assertThat() method:

// Correct
private ArbitraryFile outputFile;
outputFile = rootProject.buildDir().file("plugin-testing/dependency-versions.properties");
outputFile.assertThat().exists();

Discovery Method: Examined existing test files and read the testing guide's "File Assertions" section. Also explored the framework source code at /tmp/gradle-plugin-testing to understand the Directory and ArbitraryFile classes.

Error 2: Incorrect import for ProjectFile

Problem: Initially tried to import ProjectFile from com.palantir.gradle.testing.project package.

Error Message:

error: cannot find symbol
import com.palantir.gradle.testing.project.ProjectFile;
  symbol:   class ProjectFile
  location: package com.palantir.gradle.testing.project

Solution: Corrected the import to use ArbitraryFile from com.palantir.gradle.testing.files.arbitrary:

import com.palantir.gradle.testing.files.arbitrary.ArbitraryFile;

Discovery Method: Used grep to find the correct package location in the framework source at /tmp/gradle-plugin-testing, and read the Directory.java interface to understand the return type of the file() method.

Best Practices Review Phase

Issue 3: Method chaining on single line

Problem: Chained multiple .add() calls on a single line, which reduces readability.

// Before
project.buildGradle().plugins().add("groovy").add("com.palantir.gradle-plugin-testing");

Solution: Split the chain across multiple lines for better readability:

// After
project.buildGradle()
        .plugins()
        .add("groovy")
        .add("com.palantir.gradle-plugin-testing");

Discovery Method: Reviewed the testing-guide.md examples and compared with the existing migrated test file PluginTestingJunitPluginTest.java.

Issue 4: Using old TestContentHelpers API with File objects

Problem: Called TestContentHelpers.addVersionsToPropsFile() which requires a File object, forcing the use of .path().toFile() conversions.

// Before
TestContentHelpers.addVersionsToPropsFile(
        project.file("versions.props").path().toFile(),
        java.util.List.of("org.junit.jupiter:junit-jupiter", ...));

Solution: Used the fluent PropertiesFile API directly instead:

// After
project.propertiesFile("versions.props")
        .appendProperty("org.junit.jupiter:junit-jupiter", TestDependencyVersions.version("org.junit.jupiter:junit-jupiter"))
        .appendProperty("com.netflix.nebula:nebula-test", TestDependencyVersions.version("com.netflix.nebula:nebula-test"))
        // ... more properties

Discovery Method: Re-read the "Properties Files" section of the testing guide which explicitly states to use appendProperty(key, value) for properties files.

Summary

The main challenges were:

1. Understanding the correct assertion API for file objects (use projectFile.assertThat() not assertThat(file))
2. Finding the correct types and packages in the new framework
3. Following best practices for fluent API usage and avoiding conversion to legacy types

The migration was successful after addressing these issues, and the test now compiles correctly.

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