50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
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# 🧪 Testgen Guide
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The `testgen` command generates high-quality unit tests for your existing code files using AI. It's designed to match your project's testing conventions and use the most modern practices for each language.
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### Benefits
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- **Go**: Table-driven `t.Parallel()` matching codebase.
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- **Python**: Pytest with `@parametrize`.
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- **C**: Check framework suites.
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- **C++**: Google Test `EXPECT_*`.
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- **Boosts coverage**; safe preview.
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### Usage
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Generate comprehensive unit tests for Go/Python/C/C++ files using AI.
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```bash
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grokkit testgen internal/grok/client.go
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grokkit testgen app.py --yes
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grokkit testgen foo.c bar.cpp
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```
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### Safety Features
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- **Lang detection** via `internal/linter`.
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- **Unified diff preview**.
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- **Y/N confirmation** (`--yes` to auto-confirm).
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### Options
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| Flag | Description |
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|------|-------------|
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| `--yes`, `-y` | Skip the confirmation prompt and write tests immediately |
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| `--model`, `-m` | Override the default model (e.g., `grok-4`) |
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### How it Works
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1. **Language Detection**: Grokkit detects the language using its internal linter.
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2. **Context Analysis**: It reads the source file and any existing test file.
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3. **AI Generation**: It sends the source code to Grok with a language-specific system prompt.
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4. **Style Matching**: Grok is instructed to use modern idioms and match the project's testing style.
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5. **Interactive Diff**: If a test file already exists, it shows a diff of the proposed changes.
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### Best Practices
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- **Start with unit tests**: Test individual functions and methods.
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- **Run tests immediately**: After `testgen` completes, run `make test` or your language-specific test runner to verify the generated tests.
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- **Review for accuracy**: AI-generated tests are a great starting point, but always review them to ensure the logic and assertions are correct.
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- **Coverage**: Use `make test-cover` (for Go) to see how much your new tests have improved your coverage.
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