Clive, 2nd ed. User's manual. Section 2 
SYNOPSYS

import "clive/cmd/test"

func Cmd(t *testing.T, cmd string) (cout, cerr string, fails bool)
func Cmds(t *testing.T, runs []Run)
func InstallCmd(t *testing.T)
type Run struct { ... }

DESCRIPTION

Help for testing commands

CONSTANTS

TYPES

type Run struct {
	Line     string
	Out, Err string
	Fails    bool
	Ok       bool // if set, out, err and fails are ignored
}

FUNCTIONS

func Cmd(t *testing.T, cmd string) (cout, cerr string, fails bool)
    Run cmd and make sure that the out and err streams are as given. The command
    runs at /tmp/cmdtest where zx/fstest.MkTree has created our usual file
    testing tree, in case the command needs input. It is run using "sh -c 'cd
    /tmp/cmdtest; ' ". go install is run before running the command.

func Cmds(t *testing.T, runs []Run)

func InstallCmd(t *testing.T)
    Installs the command, for use before running the tests.

User's manual, 2nd ed. Section 2