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echo_handler_test.go
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echo_handler_test.go
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package telnet
import (
"bytes"
"testing"
)
func TestEchoHandler(t *testing.T) {
tests := []struct{
Bytes []byte
Expected []byte
}{
{
Bytes: []byte{},
Expected: []byte{},
},
{
Bytes: []byte("a"),
Expected: []byte("a"),
},
{
Bytes: []byte("b"),
Expected: []byte("b"),
},
{
Bytes: []byte("c"),
Expected: []byte("c"),
},
{
Bytes: []byte("apple"),
Expected: []byte("apple"),
},
{
Bytes: []byte("banana"),
Expected: []byte("banana"),
},
{
Bytes: []byte("cherry"),
Expected: []byte("cherry"),
},
{
Bytes: []byte("apple banana cherry"),
Expected: []byte("apple banana cherry"),
},
{
Bytes: []byte{255, 255},
Expected: []byte{255, 255},
},
{
Bytes: []byte{255, 255, 255, 255},
Expected: []byte{255, 255, 255, 255},
},
{
Bytes: []byte{255, 255, 255, 255, 255, 255},
Expected: []byte{255, 255, 255, 255, 255, 255},
},
{
Bytes: []byte{255, 255, 255, 255, 255, 255, 255, 255},
Expected: []byte{255, 255, 255, 255, 255, 255, 255, 255},
},
{
Bytes: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
Expected: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
Bytes: []byte("apple\xff\xffbanana\xff\xffcherry"),
Expected: []byte("apple\xff\xffbanana\xff\xffcherry"),
},
{
Bytes: []byte("\xff\xffapple\xff\xffbanana\xff\xffcherry\xff\xff"),
Expected: []byte("\xff\xffapple\xff\xffbanana\xff\xffcherry\xff\xff"),
},
{
Bytes: []byte("apple\xff\xff\xff\xffbanana\xff\xff\xff\xffcherry"),
Expected: []byte("apple\xff\xff\xff\xffbanana\xff\xff\xff\xffcherry"),
},
{
Bytes: []byte("\xff\xff\xff\xffapple\xff\xff\xff\xffbanana\xff\xff\xff\xffcherry\xff\xff\xff\xff"),
Expected: []byte("\xff\xff\xff\xffapple\xff\xff\xff\xffbanana\xff\xff\xff\xffcherry\xff\xff\xff\xff"),
},
{
Bytes: []byte{255,251,24}, // IAC WILL TERMINAL-TYPE
Expected: []byte{},
},
{
Bytes: []byte{255,252,24}, // IAC WON'T TERMINAL-TYPE
Expected: []byte{},
},
{
Bytes: []byte{255,253,24}, // IAC DO TERMINAL-TYPE
Expected: []byte{},
},
{
Bytes: []byte{255,254,24}, // IAC DON'T TERMINAL-TYPE
Expected: []byte{},
},
{
Bytes: []byte{67, 255,251,24}, // 'C' IAC WILL TERMINAL-TYPE
Expected: []byte{67},
},
{
Bytes: []byte{67, 255,252,24}, // 'C' IAC WON'T TERMINAL-TYPE
Expected: []byte{67},
},
{
Bytes: []byte{67, 255,253,24}, // 'C' IAC DO TERMINAL-TYPE
Expected: []byte{67},
},
{
Bytes: []byte{67, 255,254,24}, // 'C' IAC DON'T TERMINAL-TYPE
Expected: []byte{67},
},
{
Bytes: []byte{255,251,24, 68}, // IAC WILL TERMINAL-TYPE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{255,252,24, 68}, // IAC WON'T TERMINAL-TYPE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{255,253,24, 68}, // IAC DO TERMINAL-TYPE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{255,254,24, 68}, // IAC DON'T TERMINAL-TYPE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{67, 255,251,24, 68}, // 'C' IAC WILL TERMINAL-TYPE 'D'
Expected: []byte{67,68},
},
{
Bytes: []byte{67, 255,252,24, 68}, // 'C' IAC WON'T TERMINAL-TYPE 'D'
Expected: []byte{67,68},
},
{
Bytes: []byte{67, 255,253,24, 68}, // 'C' IAC DO TERMINAL-TYPE 'D'
Expected: []byte{67,68},
},
{
Bytes: []byte{67, 255,254,24, 68}, // 'C' IAC DON'T TERMINAL-TYPE 'D'
Expected: []byte{67,68},
},
{
Bytes: []byte{255, 250, 24, 1, 255, 240}, // IAC SB TERMINAL-TYPE SEND IAC SE
Expected: []byte{},
},
{
Bytes: []byte{255, 250, 24, 0, 68,69,67,45,86,84,53,50 ,255, 240}, // IAC SB TERMINAL-TYPE IS "DEC-VT52" IAC SE
Expected: []byte{},
},
{
Bytes: []byte{67, 255, 250, 24, 1, 255, 240}, // 'C' IAC SB TERMINAL-TYPE SEND IAC SE
Expected: []byte{67},
},
{
Bytes: []byte{67, 255, 250, 24, 0, 68,69,67,45,86,84,53,50 ,255, 240}, // 'C' IAC SB TERMINAL-TYPE IS "DEC-VT52" IAC SE
Expected: []byte{67},
},
{
Bytes: []byte{255, 250, 24, 1, 255, 240, 68}, // IAC SB TERMINAL-TYPE SEND IAC SE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{255, 250, 24, 0, 68,69,67,45,86,84,53,50 ,255, 240, 68}, // IAC SB TERMINAL-TYPE IS "DEC-VT52" IAC SE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{67, 255, 250, 24, 1, 255, 240, 68}, // 'C' IAC SB TERMINAL-TYPE SEND IAC SE 'D'
Expected: []byte{67, 68},
},
{
Bytes: []byte{67, 255, 250, 24, 0, 68,69,67,45,86,84,53,50 ,255, 240, 68}, // 'C' IAC SB TERMINAL-TYPE IS "DEC-VT52" IAC SE 'D'
Expected: []byte{67, 68},
},
{
Bytes: []byte{255,250, 0,1,2,3,4,5,6,7,8,9,10,11,12,13 ,255,240}, // IAC SB 0 1 2 3 4 5 6 7 8 9 10 11 12 13 IAC SE
Expected: []byte{},
},
{
Bytes: []byte{67, 255,250, 0,1,2,3,4,5,6,7,8,9,10,11,12,13 ,255,240}, // 'C' IAC SB 0 1 2 3 4 5 6 7 8 9 10 11 12 13 IAC SE
Expected: []byte{67},
},
{
Bytes: []byte{255,250, 0,1,2,3,4,5,6,7,8,9,10,11,12,13 ,255,240, 68}, // IAC SB 0 1 2 3 4 5 6 7 8 9 10 11 12 13 IAC SE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{67, 255,250, 0,1,2,3,4,5,6,7,8,9,10,11,12,13 ,255,240, 68}, // 'C' IAC SB 0 1 2 3 4 5 6 7 8 9 10 11 12 13 IAC SE 'D'
Expected: []byte{67,68},
},
//@TODO: Is this correct? Can IAC appear between thee 'IAC SB' and ''IAC SE'?... and if "yes", do escaping rules apply?
{
Bytes: []byte{ 255,250, 255,255,240 ,255,240}, // IAC SB 255 255 240 IAC SE = IAC SB IAC IAC SE IAC SE
Expected: []byte{},
},
{
Bytes: []byte{67, 255,250, 255,255,240 ,255,240}, // 'C' IAC SB 255 255 240 IAC SE = IAC SB IAC IAC SE IAC SE
Expected: []byte{67},
},
{
Bytes: []byte{ 255,250, 255,255,240 ,255,240, 68}, // IAC SB 255 255 240 IAC SE = IAC SB IAC IAC SE IAC SE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{67, 255,250, 255,255,240 ,255,240, 68}, // 'C' IAC SB 255 255 240 IAC SE = IAC SB IAC IAC SE IAC SE 'D'
Expected: []byte{67,68},
},
//@TODO: Is this correct? Can IAC appear between thee 'IAC SB' and ''IAC SE'?... and if "yes", do escaping rules apply?
{
Bytes: []byte{ 255,250, 71,255,255,240 ,255,240}, // IAC SB 'G' 255 255 240 IAC SE = IAC SB 'G' IAC IAC SE IAC SE
Expected: []byte{},
},
{
Bytes: []byte{67, 255,250, 71,255,255,240 ,255,240}, // 'C' IAC SB 'G' 255 255 240 IAC SE = IAC SB 'G' IAC IAC SE IAC SE
Expected: []byte{67},
},
{
Bytes: []byte{ 255,250, 71,255,255,240 ,255,240, 68}, // IAC SB 'G' 255 255 240 IAC SE = IAC SB 'G' IAC IAC SE IAC SE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{67, 255,250, 71,255,255,240 ,255,240, 68}, // 'C' IAC SB 'G' 255 255 240 IAC SE = IAC 'G' SB IAC IAC SE IAC SE 'D'
Expected: []byte{67,68},
},
//@TODO: Is this correct? Can IAC appear between thee 'IAC SB' and ''IAC SE'?... and if "yes", do escaping rules apply?
{
Bytes: []byte{ 255,250, 255,255,240,72 ,255,240}, // IAC SB 255 255 240 'H' IAC SE = IAC SB IAC IAC SE 'H' IAC SE
Expected: []byte{},
},
{
Bytes: []byte{67, 255,250, 255,255,240,72 ,255,240}, // 'C' IAC SB 255 255 240 'H' IAC SE = IAC SB IAC IAC SE 'H' IAC SE
Expected: []byte{67},
},
{
Bytes: []byte{ 255,250, 255,255,240,72 ,255,240, 68}, // IAC SB 255 255 240 'H' IAC SE = IAC SB IAC IAC SE 'H' IAC SE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{67, 255,250, 255,255,240,72 ,255,240, 68}, // 'C' IAC SB 255 255 240 'H' IAC SE = IAC SB IAC IAC SE 'H' IAC SE 'D'
Expected: []byte{67,68},
},
//@TODO: Is this correct? Can IAC appear between thee 'IAC SB' and ''IAC SE'?... and if "yes", do escaping rules apply?
{
Bytes: []byte{ 255,250, 71,255,255,240,72 ,255,240}, // IAC SB 'G' 255 255 240 'H' IAC SE = IAC SB 'G' IAC IAC SE 'H' IAC SE
Expected: []byte{},
},
{
Bytes: []byte{67, 255,250, 71,255,255,240,72 ,255,240}, // 'C' IAC SB 'G' 255 255 240 'H' IAC SE = IAC SB 'G' IAC IAC SE 'H' IAC SE
Expected: []byte{67},
},
{
Bytes: []byte{ 255,250, 71,255,255,240,72 ,255,240, 68}, // IAC SB 'G' 255 255 240 'H' IAC SE = IAC SB 'G' IAC IAC SE 'H' IAC SE 'D'
Expected: []byte{68},
},
{
Bytes: []byte{67, 255,250, 71,255,255,240,72 ,255,240, 68}, // 'C' IAC SB 'G' 255 255 240 'H' IAC SE = IAC 'G' SB IAC IAC SE 'H' IAC SE 'D'
Expected: []byte{67,68},
},
}
for testNumber, test := range tests {
var ctx Context = nil
var buffer bytes.Buffer
writer := newDataWriter(&buffer)
reader := newDataReader( bytes.NewReader(test.Bytes) )
EchoHandler.ServeTELNET(ctx, writer, reader)
if expected, actual := string(test.Expected), buffer.String(); expected != actual {
t.Errorf("For test #%d, expected %q, but actually got %q.", testNumber, expected, actual)
continue
}
}
}