message: add fontSize tests to Heading
diff: @@ -63,6 +63,12 @@ describe('Heading', () => {
  expect(render(<Heading nowrap theme={theme} />)).toEqual(render(<span className="no-wrap" />))
  })
  + it('renders fontSize', () => {
  + for (const fontSize of theme.fontSizes) {
  + expect(render(<Heading fontSize={fontSize} theme={theme} />)).toHaveStyleRule('font-size', fontSize + 'px')
  + }
  + })
  +
  xit('renders fontSize with f* classes using inverse scale', () => {
  expect(render(<Heading fontSize={0} theme={theme} />)).toEqual(render(<span className="f6" />))
  expect(render(<Heading fontSize={1} theme={theme} />)).toEqual(render(<span className="f5" />))
  