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('dynamic injection', () => {
    beforeEach(() => {
      
      
      
      
      
      onAfterResetModules = () => {
        const DOMProperty = require('DOMProperty');
        DOMProperty.injection.injectDOMPropertyConfig({
          isCustomAttribute: function(name) {
            return name.indexOf('foo-') === 0;
          },
          Properties: {foobar: null},
        });
      };
      resetModules();
    });
    afterEach(() => {
      onAfterResetModules = null;
    });
    itRenders('injected attributes', async render => {
      const e = await render(<div foobar="simple" foo-xyz="simple" />, 0);
      expect(e.getAttribute('foobar')).toBe('simple');
      expect(e.getAttribute('foo-xyz')).toBe('simple');
    });
  });
});