Chris James:

Write a simple web server in Go with test driven development. Learn how to use mocking to let you break the problem down into small iterative chunks. All using standard library, source code is available to read.

The linked page is a sub-section of the Learn Go with tests GitBook. Do you enjoy TDD and want to learn Go? Or do you enjoy Go and want to learn TDD? Either way, this looks like a great (WIP) resource.