Automate Vitest testing pattern adoption in TypeScript and JavaScript projects.
npx skills add https://github.com/KilloconQ/dotfiles --skill vitest-4
Please help me install this Agent Skill. Skill: vitest-4 Source: https://github.com/KilloconQ/dotfiles/tree/main/opencode/.config/opencode/skills/vitest-4 Command: npx skills add https://github.com/KilloconQ/dotfiles --skill vitest-4
Vitest 4 testing patterns and best practices streamline test writing, organization, and reliability by providing consistent patterns for asserts, mocks, spies, and module mocking.
Write a Vitest test file following describe/it/test blocks with asserts; for example, import { describe, it, test, expect } from "vitest"; run tests via vitest to verify behavior.
High-intent search queries and answers about installing and using this skill.
Vitest supports parameterized tests for running multiple data scenarios and snapshot testing for tracking UI or output changes. These features, combined with structured test organization, help verify behavior comprehensively across varied inputs and maintain reliable frontend test suites.
Maintainable Vitest unit tests use the AAA pattern within isolated describe, it, and test blocks to separate setup, execution, and assertion phases clearly. This structure ensures reliable mocks and spies while keeping your TypeScript frontend or backend test suites organized.
The best way to mock modules in Vitest is using vi.mock for module-level mocking and spies to track function calls. This approach ensures robust testing workflows by replacing dependencies and validating interactions without altering actual implementations.
Use toEqual for deep equality checks ignoring undefined properties, and toStrictEqual for strict type and structure matching in Vitest assertions. Applying explicit matchers correctly prevents false positives and ensures your TypeScript objects match expected schemas exactly.
Testing async workflows with Vitest involves awaiting promises inside it blocks and utilizing fake timers to control time-dependent operations. Proper restoration of mocks and timers after each test maintains isolation and prevents cascading test failures.
Vitest supports parameterized tests for running multiple data scenarios and snapshot testing for tracking UI or output changes. These features, combined with structured test organization, help verify behavior comprehensively across varied inputs and maintain reliable frontend test suites.
testdriveraiAutomate TestDriver test execution with Vitest and coverage reporting.
dorrioExecute all defined test suites and generate code coverage reports.
Mte90Automate JavaScript project setup with ESLint, Prettier, Jest, and Vite.
matteocervelliGenerate test scaffolding and templates for Python and JavaScript/TypeScript modules.
