Testing exports from library

index.test.tsx

import {
  Button,
  ButtonProps,
  BrandComponent,
  BrandComponentProps,
  Typography,
  TypographyProps,
} from './index'

describe('Component exports', () => {
  it('exports a Button component', () => {
    expect(Button).toBeDefined()
    expect(typeof Button).toBe('function')
  })

  it('exports a ButtonProps type', () => {
    type Props = ButtonProps
    const props: Props = {
      onClick: () => {},
    }
    expect(props).toBeDefined()
  })

  it('exports a BrandComponent component', () => {
    expect(BrandComponent).toBeDefined()
    expect(typeof BrandComponent).toBe('function')
  })

  it('exports a BrandComponentProps type', () => {
    type Props = BrandComponentProps
    const props: Props = {
      variant: 'stacked',
    }
    expect(props).toBeDefined()
  })

  it('exports a Typography component', () => {
    expect(Typography).toBeDefined()
    expect(typeof Typography).toBe('function')
  })

  it('exports a TypographyProps type', () => {
    type Props = TypographyProps
    const props: Props = {
      variant: 'h1',
    }
    expect(props).toBeDefined()
  })
})