Make sure you have Go 1.13 or higher installed.
https://golang.org/doc/install
Set-up the standard Go environment variables according to latest guidance (see https://golang.org/doc/install#install).
From the project root, run:
go build ./...
go test ./...
go mod tidy
From the project root, run:
go test ./...
or
go test ./... -cover
or
go test -v ./... -cover
depending on whether you want to see test coverage and how verbose the output you want.