tests: add tests

tests/Button.test.tsx

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+import { expect, test } from 'vitest'
+import { render, screen, cleanup } from '@testing-library/react'
+import { Button } from '@/components/Button'
+
+test('button', () => {
+  render(<Button>Hello</Button>)
+
+  expect(screen.getByText('Hello')).toBeDefined()
+
+  cleanup()
+})
+
+test('button-with-link', () => {
+  render(<Button href="/country-road">Hello</Button>)
+
+  expect(screen.getByText('Hello').getAttribute('href')).toBe('/country-road')
+
+  cleanup()
+})

tests/Home.test.tsx

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+import { expect, test } from 'vitest'
+import { render, screen, within } from '@testing-library/react'
+import Home from '../pages'
+
+test('home', () => {
+  render(<Home />)
+  const main = within(screen.getByRole('main'))
+  expect(main.getByRole('heading', { level: 1, name: /DevOps jednoduše pro všechny./i })).toBeDefined()
+
+    const meets = screen.getAllByText(/Domluvme si schůzku/i)
+    meets.map(
+      (m) => expect(m.getAttribute('href'))
+        .toBe('https://calendly.com/vojtechmares/30min')
+    )
+
+  // const footer = within(screen.getByRole('contentinfo'))
+  // const link = within(footer.getByRole('link'))
+  // expect(link.getByRole('img', { name: /vercel logo/i })).toBeDefined()
+})