buf2d/buffer_sub_test.go

package buf2d

import (
	"fmt"
	"strings"
	"testing"
)

func TestSub(t *testing.T) {
	b := NewBuffer(10, 10)
	s := b.Sub(1, 1, b.Width()-1, b.Height()-1)
	b.Set(5, 1, 'a')
	s.Set(5, 5, 'b')

	fmt.Println(b)
	fmt.Println(strings.Repeat("-", 20))
	fmt.Println(s)
}