TestGen AI 🤖🧪

An AI-powered CLI tool that automatically generates Dart unit tests using Google's Gemini AI. Improve your test coverage with intelligent test case generation!

Features ✨

🚀 Generate tests for Dart functions/classes
🧠 AI-powered edge case detection
⚙️ Simple CLI interface
📊 Integrates with package:coverage (future update)

Quick Start

1. Install

dart pub add test_gen

2. Configuration

i. Get Gemini API Key

ii. Set environment variable:

Linux/macOS

export GEMINI_API_KEY="your_key"

Windows

$env:GEMINI_API_KEY="your_key"

3. Generate tests

dart run test_gen -i lib/subfolder(if any)/file_name.dart

E.g:

dart run test_gen -i lib/math.dart

Example 🧪

Input File (lib/math.dart)

int add(int a, int b) => a + b;

Generated Test (test/math_test.dart):

import 'package:test/test.dart';
import '../lib/math.dart';

void main() {
  test('adds two numbers', () {
    expect(add(2, 3), 5);
  });
}

CLI Options

Option	Short	Description	Default
`--input`	`-i`	Input Dart file (required)	-
`--output`	`-o`	Output directory	`test/`
`--verbose`	`-v`	Show detailed output	`false`

Troubleshooting 🚨

Common Issues

Missing API Key: Ensure GEMINI_API_KEY is set

Invalid Input Path: Verify file exists and is a Dart file

Test Validation Errors: Review generated tests for AI hallucinations

Features Roadmap 🗺️

Coverage analysis integration
Batch processing for entire directories
Test validation system
Custom prompt templates

Building from Source 🛠️

Clone repository

git clone https://github.com/yourusername/test_gen_dart.git
cd test_gen_dart

Install dependencies

dart pub get

Run development version

dart run test_gen -i lib/example.dart

Project Structure

Path	Type	Purpose
`bin/test_gen.dart`	CLI Entry	Command line interface handling and argument parsing
`lib/test_generator.dart`	Core Logic	Contains implementation of test generation logic
`lib/sample/`	Examples	Sample input files
`test/`	Unit Tests	Sample output tests for verification