# detect the path to the yanglint binary
if { [info exists ::env(YANGLINT)] } {
    set yanglint "$env(YANGLINT)"
} else {
    set yanglint "../../../../build/yanglint"
}

# set the timeout to 1 second
set timeout 1

# expect a single line of anchored regex output
proc expect_output {output} {
    expect {
        -re "^${output}$" {}
        timeout {exit 1}
    }
}

# send a command and either expect some anchored regex output if specified or just an empty line
proc expect_command {command has_output output} {
    send -- "${command}\r"

    if ($has_output==1) {
        expect {
            -re "^${command}\r\n${output}$" {}
            timeout {exit 1}
        }
    } else {
        # input echoes
        expect {
            -re "^${command}\r\n$" {}
            timeout {exit 1}
        }
        expect {
            -re "^> $" {}
            timeout {exit 1}
        }
    }
}

# send a completion request and check if the anchored regex output matches
proc expect_completion {input output} {
    send -- "${input}\t"

    expect {
        # expecting echoing input, output and 10 terminal control characters
        -re "^${input}\r> ${output}.*\r.*$" {}
        timeout {exit 1}
    }
}

# send a completion request and check if the anchored regex hint options match
proc expect_hint {input prev_input hints} {
    set output {}
    foreach i $hints {
        # each element might have some number of spaces and CRLF around it
        append output "${i} *(?:\\r\\n)?"
    }

    send -- "${input}\t"

    expect {
        # expecting the hints, previous input from which the hints were generated
        # and some number of terminal control characters
        -re "^\r\n${output}\r> ${prev_input}.*\r.*$" {}
        timeout {exit 1}
    }
}