Run the [`fixtures/ssr` test harness](https://github.com/facebook/react/tree/master/fixtures/ssr). In the terminal, the following warning is logged:

```
Warning: Unknown prop `onClick` on <a> tag. Remove this prop from the element. For details, see https://fb.me/react-unknown-prop
  in a (at Page.js:12)
  in p (at Page.js:18)
  in div (at Page.js:17)
  in Page (at App.js:12)
  in div (at App.js:10)
  in body (at Chrome.js:17)
  in html (at Chrome.js:9)
  in Chrome (at App.js:9)
  in App (at render.js:18)
```

SSR behavior should match client-side behavior and not warn for a valid attribute.
);
    });
    describe('checkboxes', function() {
      itRenders('a checkbox that is checked with an onChange', async render => {
        const e = await render(
          <input type="checkbox" checked={true} onChange={() => {}} />,
        );
        expect(e.checked).toBe(true);
      });
      itRenders('a checkbox that is checked with readOnly', async render => {
        const e = await render(
          <input type="checkbox" checked={true} readOnly={true} />,
        );
        expect(e.checked).toBe(true);
      });
      itRenders(
        'a checkbox that is checked and no onChange/readOnly',
        async render => {
          
          
          const e = await render(<input type="checkbox" checked={true} />, 1);
          expect(e.checked).toBe(true);
        },
      );
      itRenders('a checkbox with defaultChecked', async render => {
        const e = await render(<input type="checkbox" defaultChecked={true} />);
        expect(e.checked).toBe(true);
        expect(e.getAttribute('defaultChecked')).toBe(null);
      });
      itRenders(