Accompanies this article: Unit-Testing-Exec-Command-In-Golang
Package funshell contains the ShellCommand function which is being tested.
ShellCommand just kicks off the shell command echo 'fun!'.
The main function in main.go just calls this, catches errors and then prints out anything that was output to stdout.
Package funshell_test runs some simple unit tests against ShellCommand.
Run the program with go run main.go.
Run the tests with go test ./...