Mender authentication integration with CI (a mock configuration)

I would like to be able to perform some tests with MenderClient for the product that I’m currently working on, but without need to have full Mender configuration (A/B partition ect). Covering following test cases would help me:

  1. Update MenderClient can connect to mender server (test mender client authentication)
  2. MenderClient can fetch an artifact and verify signature against a key (test of mender client artifact verification)

Is there any way to stop other than update/verify steps by tweaking a configuration (creating effectively mock configuration)? Or there are already similar cases are covered by Mender tests?