message: tidy up OcticonButton tests
diff: @@ -7,8 +7,19 @@ const Circle = ({r = 8}) => <circle cx={r} cy={r} r={r} />
  Circle.size = [16, 16]
  describe('OcticonButton', () => {
  + /**
  + * these are the props we always expect to see on the <button>;
  + * you can test additional values by comparing the rendered
  + * result with:
  + *
  + * ```js
  + * <button {..defaultButtonProps} disabled>...
  + * ```
  + */
  + const defaultButtonProps = {'aria-label': '', className: 'btn-link text-inherit'}
  +
  it('renders a button with an Octicon', () => {
  - expect(render(<OcticonButton icon={Circle} />)).toEqual(render(<button aria-label=""><Octicon icon={Circle} /></button>))
  + expect(render(<OcticonButton icon={Circle} />)).toEqual(render(<button {...defaultButtonProps}><Octicon icon={Circle} /></button>))
  })
  it('respects the "disabled" prop', () => {
  @@ -25,6 +36,6 @@ describe('OcticonButton', () => {
  })
  it('passes the "size" prop to the Octicon', () => {
  - expect(render(<OcticonButton icon={Circle} size={128} />)).toEqual(render(<button aria-label=""><Octicon icon={Circle} size={128} /></button>))
  + expect(render(<OcticonButton icon={Circle} size={128} />)).toEqual(render(<button {...defaultButtonProps}><Octicon icon={Circle} size={128} /></button>))
  })
  })
  