package mtest import ( . "testing" "github.com/mediocregopher/mediocre-go-lib/mcfg" ) func TestRun(t *T) { cmp := Component() Env(cmp, "ARG", "foo") arg := mcfg.String(cmp, "arg", mcfg.ParamRequired()) Run(cmp, t, func() { if *arg != "foo" { t.Fatalf(`arg not set to "foo", is set to %q`, *arg) } }) }