go-astiav/io_context_test.go

58 lines
1.3 KiB
Go

package astiav
import (
"os"
"path/filepath"
"testing"
"github.com/stretchr/testify/require"
)
func TestIOContext(t *testing.T) {
var seeked bool
rb := []byte("read")
wb := []byte("write")
var written []byte
c, err := AllocIOContext(8, true, func(b []byte) (int, error) {
copy(b, rb)
return len(rb), nil
}, func(offset int64, whence int) (n int64, err error) {
seeked = true
return offset, nil
}, func(b []byte) (int, error) {
written = make([]byte, len(b))
copy(written, b)
return len(b), nil
})
require.NoError(t, err)
defer c.Free()
b := make([]byte, 6)
n, err := c.Read(b)
require.NoError(t, err)
require.Equal(t, 4, n)
require.Equal(t, rb, b[:n])
_, err = c.Seek(2, 0)
require.NoError(t, err)
require.True(t, seeked)
c.Write(wb)
c.Flush()
require.Equal(t, wb, written)
}
func TestOpenIOContext(t *testing.T) {
path := filepath.Join(t.TempDir(), "iocontext.txt")
c, err := OpenIOContext(path, NewIOContextFlags(IOContextFlagWrite))
require.NoError(t, err)
cl := c.Class()
require.NotNil(t, cl)
require.Equal(t, "AVIOContext", cl.Name())
c.Write(nil)
c.Write([]byte("test"))
require.NoError(t, c.Close())
b, err := os.ReadFile(path)
require.NoError(t, err)
require.Equal(t, "test", string(b))
err = os.Remove(path)
require.NoError(t, err)
}