NewCmd converts an Input into a command.

NewCmdArgs converts an Input value into argument strings for use in exec.Command.

Which returns the absolute path to where the CLI would be installed based on GOPATH.

DefaultStderr is the default value for the --stderr flag.

DefaultStdout is the default value for the --stdout flag.

DefaultStdoutFromStdin is the standard output emitted by testecho when it receives DefaultStdout via standard input.

DefaultStdoutFromStdinNested is the standard output emitted by testecho when it receives DefaultStdoutFromStdin via standard input.

Input defines the CLI flags to use in a testecho invocation.