reactjs - Change element size using Jest

Question

I have following code in my component

var rect = ReactDOM.findDOMNode(this).getBoundingClientRect();

I use d3js and render graph in the component. But when I run test there are any svg tags. I assume that it happens because all rect's fields equals 0.

Here is output for console.log(rect) in browser:

ClientRect {top: 89, right: 808, bottom: 689, left: 8, width: 800…}

and when I run test:

{ bottom: 0, height: 0, left: 0, right: 0, top: 0, width: 0 }

So is there a way to set size of the element?