Mocking React Router’s match object in component unit tests

Recently our UI team has switched from Enzyme to Kent Dodd’s Testing Library for a much improved, simplified experience in testing JavaScript and React components.

The issue
We have a growing number of applications which rely upon React Router to to handle client-side routing, and a good number of “container” components are dependent upon a URL parameter value for making network requests.

When testing these components with Testing Library / Jest, we need a way to mock routes and…