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package vt100_test
import (
"io"
"strings"
"testing"
. "github.com/jaguilar/vt100"
"github.com/jaguilar/vt100/vttest"
"github.com/stretchr/testify/assert"
)
func splitLines(s string) [][]rune {
ss := strings.Split(s, "\n")
r := make([][]rune, len(ss))
for i, line := range ss {
r[i] = []rune(line)
}
return r
}
func esc(s string) string {
return "\u001b" + s
}
func cmd(s string) Command {
cmd, err := Decode(strings.NewReader(s))
if err != nil {
panic(err)
}
return cmd
}
func cmds(s string) []Command {
var c []Command
r := strings.NewReader(s)
for {
x, err := Decode(r)
if err == io.EOF {
return c
}
if err != nil {
panic(err)
}
c = append(c, x)
}
}
func TestPutRune(t *testing.T) {
v := vttest.FromLines("abc\ndef\nghi")
v.Cursor.Y = 1
v.Cursor.X = 1
assert.Nil(t, v.Process(cmd("z")))
assert.Equal(t, splitLines("abc\ndzf\nghi"), v.Content)
assert.Equal(t, 2, v.Cursor.X)
assert.Equal(t, 1, v.Cursor.Y)
}
func TestMoveCursor(t *testing.T) {
v := vttest.FromLines("abc\ndef\nghi")
assert.Nil(t, v.Process(cmd(esc("[3;1H"))))
assert.Equal(t, 2, v.Cursor.Y)
assert.Equal(t, 0, v.Cursor.X)
}
func TestCursorDirections(t *testing.T) {
v := vttest.FromLines("abc\ndef\nghi")
moves := strings.Join([]string{
esc("[2B"), // down down
esc("[2C"), // right right
esc("[A"), // up (no args = 1)
esc("[1D"), // left
}, "") // End state: +1, +1
s := strings.NewReader(moves)
want := []Cursor{
{Y: 2, X: 0},
{Y: 2, X: 2},
{Y: 1, X: 2},
{Y: 1, X: 1},
}
var got []Cursor
cmd, err := Decode(s)
for err == nil {
assert.Nil(t, v.Process(cmd))
got = append(got, v.Cursor)
cmd, err = Decode(s)
}
if assert.Equal(t, err, io.EOF) {
assert.Equal(t, want, got)
}
}
func TestErase(t *testing.T) {
c := Format{Fg: Yellow, Intensity: Bright}
var d Format
for _, tc := range []struct {
command Command
want *VT100
}{
{cmd(esc("[K")), vttest.FromLinesAndFormats("abcd\nef \nijkl", [][]Format{
{c, c, c, c},
{c, c, d, d},
{c, c, c, c},
})},
{cmd(esc("[1K")), vttest.FromLinesAndFormats("abcd\n h\nijkl", [][]Format{
{c, c, c, c},
{d, d, d, c},
{c, c, c, c},
})},
{cmd(esc("[2K")), vttest.FromLinesAndFormats("abcd\n \nijkl", [][]Format{
{c, c, c, c},
{d, d, d, d},
{c, c, c, c},
})},
{cmd(esc("[J")), vttest.FromLinesAndFormats("abcd\n \n ", [][]Format{
{c, c, c, c},
{d, d, d, d},
{d, d, d, d},
})},
{cmd(esc("[1J")), vttest.FromLinesAndFormats(" \n \nijkl", [][]Format{
{d, d, d, d},
{d, d, d, d},
{c, c, c, c},
})},
{cmd(esc("[2J")), vttest.FromLinesAndFormats(" \n \n ", [][]Format{
{d, d, d, d},
{d, d, d, d},
{d, d, d, d},
})},
} {
v := vttest.FromLinesAndFormats(
"abcd\nefgh\nijkl", [][]Format{
{c, c, c, c},
{c, c, c, c},
{c, c, c, c},
})
v.Cursor = Cursor{Y: 1, X: 2}
beforeCursor := v.Cursor
assert.Nil(t, v.Process(tc.command))
assert.Equal(t, tc.want.Content, v.Content, "while evaluating ", tc.command)
assert.Equal(t, tc.want.Format, v.Format, "while evaluating ", tc.command)
// Check the cursor separately. We don't set it on any of the test cases
// so we cannot expect it to be equal. It's not meant to change.
assert.Equal(t, beforeCursor, v.Cursor)
}
}
var (
bs = "\u0008" // Use strings to contain these runes so they can be concatenated easily.
lf = "\u000a"
cr = "\u000d"
)
func TestBackspace(t *testing.T) {
v := vttest.FromLines("BA..")
v.Cursor.Y, v.Cursor.X = 0, 2
backspace := cmd(bs)
assert.Nil(t, v.Process(backspace))
// Backspace doesn't actually delete text.
assert.Equal(t, vttest.FromLines("BA..").Content, v.Content)
assert.Equal(t, 1, v.Cursor.X)
v.Cursor.X = 0
assert.Nil(t, v.Process(backspace))
assert.Equal(t, 0, v.Cursor.X)
v = vttest.FromLines("..\n..")
v.Cursor.Y, v.Cursor.X = 1, 0
assert.Nil(t, v.Process(backspace))
assert.Equal(t, 0, v.Cursor.Y)
assert.Equal(t, 1, v.Cursor.X)
}
func TestLineFeed(t *testing.T) {
v := vttest.FromLines("AA\n..")
v.Cursor.X = 1
for _, c := range cmds(lf + "b") {
assert.Nil(t, v.Process(c))
}
assert.Equal(t, vttest.FromLines("AA\nb.").Content, v.Content)
}
func TestCarriageReturn(t *testing.T) {
v := vttest.FromLines("AA\n..")
v.Cursor.X = 1
for _, c := range cmds(cr + "b") {
assert.Nil(t, v.Process(c))
}
assert.Equal(t, vttest.FromLines("bA\n..").Content, v.Content)
}
func TestAttributes(t *testing.T) {
v := vttest.FromLines("....")
s := strings.NewReader(
esc("[2ma") + esc("[5;22;31mb") + esc("[0mc") + esc("[4;46md"))
cmd, err := Decode(s)
for err == nil {
assert.Nil(t, v.Process(cmd))
cmd, err = Decode(s)
}
assert.Equal(t, io.EOF, err)
assert.Equal(t, []rune("abcd"), v.Content[0])
assert.Equal(t, []Format{
{Intensity: Dim}, {Blink: true, Fg: Red}, {}, {Underscore: true, Bg: Cyan},
}, v.Format[0])
}
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