Migrate jest to vitest

[Atis9]

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Project	Deployment	Actions	Updated (UTC)
nyantech-com	Ready	Preview, Comment	Feb 10, 2026 4:54am

[Copilot]

Pull request overview

This PR migrates the project’s unit/integration testing setup from Jest to Vitest to run React/Next.js tests on a Vite-powered runner.

Changes:

• Add Vitest configuration and setup (jsdom env, Testing Library jest-dom matchers, Next.js component mocks).
• Update existing test files/mocks from jest.* to vi.* and update npm scripts to run Vitest.
• Remove Jest configuration and dependencies.

Reviewed changes

Copilot reviewed 8 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
vitest.setup.tsx	Adds Vitest test setup (jest-dom matchers + mocks for next/image and next/link).
vitest.config.ts	Introduces Vitest config (jsdom, setup file, coverage).
tsconfig.json	Adds Vitest global types (currently in a way that can break other global types).
package.json	Switches scripts to Vitest and replaces Jest-related devDependencies with Vitest/Vite deps.
next-env.d.ts	Changes Next-generated route types import path (currently points to a dev-only output path).
lib/posts.test.ts	Migrates module mocks from Jest to Vitest (vi.mock, vi.fn).
tests/posts-page.test.tsx	Migrates mocks from Jest to Vitest.
tests/page.test.tsx	Migrates mocks from Jest to Vitest.
jest.setup.tsx	Removed Jest setup file.
jest.config.ts	Removed Jest config file.

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