Version: **15.0.0-rc.1**
Fiddle: https://jsfiddle.net/69z2wepo/33980/ (check console)

For an example providing `NaN` to a css property will result in "_NaN is an invalid value for the fontSize css style property_".
Now I'm aware that there is an error in my code but I have no idea which component I should check.
I would like to have something like this: "_NaN is an invalid value for the fontSize style property. Check the render method of Header_".
I'll be happy to try to solve this if this is something we want to do.

);
    });
    it('should treat menuitem as a void element but still create the closing tag', function() {
      var container = document.createElement('div');
      var returnedValue = ReactDOMServer.renderToString(<menu><menuitem /></menu>);
      expect(returnedValue).toContain('</menuitem>');
      expect(function() {
        ReactDOM.render(<menu><menuitem>children</menuitem></menu>, container);
      }).toThrow(
        'menuitem is a void element tag and must not have `children` or use ' +
        '`props.dangerouslySetInnerHTML`.'
      );
    });
    it('should validate against multiple children props', function() {
      expect(function() {
        mountComponent({children: '', dangerouslySetInnerHTML: ''});
      }).toThrow(
        'Can only set one of `children` or `props.dangerouslySetInnerHTML`.'
      );
    });
    it('should validate against use of innerHTML', function() {
      spyOn(console, 'error');
      mountComponent({innerHTML: '<span>Hi Jim!</span>'});
      expect(console.error.argsForCall.length).toBe(1);
      expect(console.error.argsForCall[0][0]).toContain(
        'Directly setting property `innerHTML` is not permitted. '
      );
    });
    it('should validate use of dangerouslySetInnerHTML', function() {
      expect(function() {