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// +build !windows
package survey
import (
"bytes"
"strings"
"testing"
"github.com/AlecAivazis/survey/v2/terminal"
pseudotty "github.com/kr/pty"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestRenderer_countLines(t *testing.T) {
t.Parallel()
termWidth := 72
pty, tty, err := pseudotty.Open()
require.Nil(t, err)
defer pty.Close()
defer tty.Close()
err = pseudotty.Setsize(tty, &pseudotty.Winsize{
Rows: 30,
Cols: uint16(termWidth),
})
require.Nil(t, err)
r := Renderer{
stdio: terminal.Stdio{
In: tty,
Out: tty,
Err: tty,
},
}
tests := []struct {
name string
buf *bytes.Buffer
wants int
}{
{
name: "empty",
buf: new(bytes.Buffer),
wants: 0,
},
{
name: "no newline",
buf: bytes.NewBufferString("hello"),
wants: 0,
},
{
name: "short line",
buf: bytes.NewBufferString("hello\n"),
wants: 1,
},
{
name: "three short lines",
buf: bytes.NewBufferString("hello\nbeautiful\nworld\n"),
wants: 3,
},
{
name: "full line",
buf: bytes.NewBufferString(strings.Repeat("A", termWidth) + "\n"),
wants: 1,
},
{
name: "overflow",
buf: bytes.NewBufferString(strings.Repeat("A", termWidth+1) + "\n"),
wants: 2,
},
{
name: "overflow fills 2nd line",
buf: bytes.NewBufferString(strings.Repeat("A", termWidth*2) + "\n"),
wants: 2,
},
{
name: "overflow spills to 3rd line",
buf: bytes.NewBufferString(strings.Repeat("A", termWidth*2+1) + "\n"),
wants: 3,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
n := r.countLines(*tt.buf)
assert.Equal(t, tt.wants, n)
})
}
}
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