svgElement.getBoundingClientRect() always returns zeros while testing with nodejs

I created some svg element and want to determine its size with

svgElement.getBoundingClientRect()

My code works if the svgElement is appended to the document with

document.body.appendChild(svgElement)

and if I run the code in the browser (google chrome).

However, while testing with nodejs and jest, the width and the height of the resulting bounding rect are always zero.

=>What can I do to correctly run the code with nodejs?