Missing go.mod in "Writing a unit test in Go" video.

[kenshih]

Hello, Just a heads up...
https://egghead.io/lessons/egghead-writing-a-unit-test-in-go

When running your tutorial: "Writing a unit test in Go" on go version go1.16.5 darwin/amd64, I get the following error:

go: go.mod file not found in current directory or any parent directory; see 'go help modules'

Consider adding a go.mod file here & updating that video?

# file go.mod
module example.com/mod

(Also not, this video tests the code from "Writing a Function that Multiplies a Number by Two in Go", not the video that directly precedes it: "Returning Multiple Values from a Function in Go". So you have to revert your function first before running the test.)

Thanks for the videos. I enjoyed them.