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Vikaskanturi
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test-gen-agent

Generate JUnit 5 and pytest suites for migrated Java and Python code.

Updated Apr 4, 2026
Search Tags:#pytest#llm#test-generation#junit#test-coverage#java-to-python#migration-agent
One-click install
npx skills add https://github.com/Vikaskanturi/java_to_python_migration_agent --skill test-gen-agent-vikaskanturi
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-gen-agent
Source: https://github.com/Vikaskanturi/java_to_python_migration_agent/tree/main/skills_extracted/test-gen-agent
Command: npx skills add https://github.com/Vikaskanturi/java_to_python_migration_agent --skill test-gen-agent-vikaskanturi

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Manually writing and validating equivalent unit tests for migrated Java and Python code is time-consuming and error-prone; this agent automates generation, validation, and mapping of tests to ensure behavioral parity after migration.

Core Features & Use Cases

  • Dual-language test generation: Produces complete JUnit 5 test classes for Java and pytest modules for Python from paired source files.
  • Mismatch-driven regression tests: Reads validation mismatches and emits targeted tests to guard previously failing behaviors.
  • Validation and reporting: Verifies Python tests via pytest --collect-only, builds a coverage map, and saves test_state and coverage artifacts to output/state and output/reports.
  • LLM-driven prompts: Uses structured prompts to extract java_tests and python_tests JSON fields, handles LLM failures with error states, and writes parseable test files for CI use.
  • Use case: When migrating a Java library to idiomatic Python, run this agent to automatically produce mirrored test suites and a coverage report to include in the migration deliverable.

Quick Start

Run the test generation agent on a completed migration state to produce JUnit and pytest suites, validate Python tests, and write a coverage map and test state file.

Frequently Asked Questions about test-gen-agent

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate pytest and JUnit tests for migrated Java to Python code?▼

To generate pytest and JUnit tests for migrated Java to Python code, apply a test generation agent to each paired source file. It produces complete JUnit 5 and pytest suites, mocks external dependencies, and saves coverage artifacts to ensure behavioral parity.

What is cross-language test parity and how does it apply to Java Python migration?▼

Cross-language test parity ensures migrated Python code behaves identically to original Java code. The agent generates mirrored pytest and JUnit 5 test suites from paired files, including regression tests for known validation mismatches to maintain this parity.

Can I automatically create regression tests for Java Python migration mismatches?▼

Yes, you can automatically create regression tests for Java Python migration mismatches. The agent reads validation mismatches from the migration state and emits targeted tests to guard previously failing behaviors in the generated JUnit and pytest suites.

How do I validate pytest collection and generate coverage maps for migrated Python code?▼

To validate pytest collection and generate coverage maps, the agent runs pytest --collect-only on the produced Python tests. It then builds a coverage map targeting 80 to 100 percent branch coverage and saves test state JSON files to output directories.

Does this test generation tool work without external dependencies for Java to Python migration?▼

Yes, the test generation tool works without external dependencies for Java to Python migration. It uses LLM-driven prompts to extract test structures and mocks external dependencies in the generated JUnit 5 and pytest suites to ensure isolated validation.

What is the best way to achieve 80 to 100 percent branch coverage for migrated Python code?▼

The best way to achieve 80 to 100 percent branch coverage for migrated Python code is using an automated test generation agent. It produces comprehensive pytest suites, validates them with pytest --collect-only, and outputs detailed coverage maps identifying untested branches.

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