Guide colocated test file creation for TypeScript projects using Vitest.
npx skills add https://github.com/getsentry/abacus --skill write-tests-getsentry
Please help me install this Agent Skill. Skill: write-tests Source: https://github.com/getsentry/abacus/tree/main/.claude/skills/write-tests Command: npx skills add https://github.com/getsentry/abacus --skill write-tests-getsentry
This Skill helps teams maintain high-quality code by guiding the creation and maintenance of tests that follow project conventions, ensuring tests are colocated with source files for faster discovery and execution.
Run tests with pnpm test to verify all colocated tests run. To add a new test, place it next to the related source file (for example, place a test alongside utils.ts as utils.test.ts) and rerun pnpm test to confirm it passes.
High-intent search queries and answers about installing and using this skill.
To colocate tests in a TypeScript project, place test files directly next to the source files they cover, such as utils.test.ts alongside utils.ts, to reduce context switching and improve file discovery.
The best way to set up MSW mocks for Vitest testing is to follow colocated test patterns that provide structured mock setups for authenticated routes, ensuring reliable and fast validation of network requests.
You can test authenticated routes using Vitest by applying convention-aligned colocated test patterns that provide specific scaffolding for auth testing, ensuring reliable validation of protected endpoints.
Yes, you can use an in-memory PostgreSQL database for Vitest test scaffolding. This approach provides isolated and fast database setups to ensure reliable test results without persistent data.
Colocated testing improves CI reliability for TypeScript projects by encouraging test-driven practices and maintaining convention-aligned test files, which yields faster feedback and more consistent execution.
You should colocate test files to reduce context switching between source and test files, maintain project conventions, and achieve faster test discovery and execution compared to fragmented test directories.
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