🤖 Unit Test Agent 4J (uta): A production-ready, AI-powered CLI agent designed to automate JUnit 5 test generation. Built with Java 21 & LangChain4j. Features context-aware analysis, configurable LLM backends (OpenAI/DeepSeek), and a "write-once, run-anywhere" cross-platform architecture.

Unit Test Agent 4j

An AI-powered Java unit test generation agent. Automatically generates high-quality JUnit 5 + Mockito tests.

Features

• 🤖 Multi-LLM Support - OpenAI, Anthropic, DeepSeek, Zhipu AI
• 🔧 Self-Healing - Auto-fixes compilation errors and test failures
• 📊 Coverage-Driven - Analyzes coverage and supplements missing tests
• 🔄 Iterative Mode - Generates tests one method at a time
• ✅ LSP Syntax Check - Optional semantic analysis before compile
• 🔄 Dynamic Phase Switching - Saves 40-60% tokens (v2.2.0)

Quick Install

Linux / macOS

curl -sSL https://raw.githubusercontent.com/codelogickeep/unit-test-agent-4j/main/build.sh | bash
export PATH="$PATH:$HOME/.utagent"

Windows (PowerShell 7+)

irm https://raw.githubusercontent.com/codelogickeep/unit-test-agent-4j/main/build.ps1 | iex

Workflow

┌─────────────┐   ┌─────────────┐   ┌─────────────┐   ┌─────────────┐
│  Analysis   │ → │ Generation  │ → │Verification │ → │   Repair    │
│ Read source │   │ Write tests │   │Compile/Test │   │ Fix errors  │
└─────────────┘   └─────────────┘   └─────────────┘   └─────────────┘
                                            │                │
                                            └────────────────┘
                                              Loop until pass

1. Analysis - Read and analyze source code (AST, dependencies, complexity)
2. Generation - Generate test code based on patterns and knowledge base
3. Verification - Compile, run tests, check coverage
4. Repair - Auto-fix failures, repea