package main import ( "bytes" "os/exec" "github.com/go-check/check" ) func (s *DockerSuite) TestLoginWithoutTTY(c *check.C) { cmd := exec.Command(dockerBinary, "login") // Send to stdin so the process does not get the TTY cmd.Stdin = bytes.NewBufferString("buffer test string \n") // run the command and block until it's done if err := cmd.Run(); err == nil { c.Fatal("Expected non nil err when loginning in & TTY not available") } }