I've added an #e2e test for ensuring that calls to an external API work, and I really love that I can tie this all in one test file:

1. set up the expected call to the remote API
2. Describe the action that triggers this call
3. Verify that it happened

https://github.com/NordicSemiconductor/asset-tracker-cloud-aws-js/blob/676490a0ddc6d8489801c834412ce336846aa218/features/UnwiredLabsCellGeolocation.feature