vitest-configuration

What it does

This skill enables AI agents to configure and manage Vitest, a fast unit testing framework designed for Vite-based projects. It handles setup tasks such as initializing test environments, defining configuration files, and integrating specific plugins to streamline the testing workflow.

When to use it

• Setting up an initial test environment for a new Vite or React project.
• Customizing Vitest options like coverage thresholds, reporters, or environment settings (e.g., Node.js vs. Browser).
• Integrating third-party plugins or custom matchers into the testing suite.
• Automating the generation of vitest.config.ts or vite.config.ts test blocks.

Key capabilities

• Initializes Vitest projects with default or custom configurations.
• Manages environment variables and global setup files for tests.
• Configures coverage reporting tools and output formats.
• Sets up specific test runners and file patterns to match project structure.

Example prompts

• "Configure Vitest to run in the Node.js environment with 80% code coverage."
• "Create a vitest.config.ts file that uses the Playwright test runner."
• "Set up Vitest to ignore specific folders and use the Jest-style snapshot format."

Tips & gotchas

Ensure your project is already initialized with Vite before attempting to configure Vitest, as they are tightly coupled. Always verify that the chosen environment (Node or Browser) matches the dependencies installed in your package.json to avoid runtime errors during test execution.