mirror of
https://github.com/rclone/rclone.git
synced 2024-12-23 15:38:57 +01:00
101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
package readers
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestRepeatableReader(t *testing.T) {
|
|
var dst []byte
|
|
var n int
|
|
var pos int64
|
|
var err error
|
|
|
|
b := []byte("Testbuffer")
|
|
buf := bytes.NewBuffer(b)
|
|
r := NewRepeatableReader(buf)
|
|
|
|
dst = make([]byte, 100)
|
|
n, err = r.Read(dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 10, n)
|
|
require.Equal(t, b, dst[0:10])
|
|
|
|
// Test read EOF
|
|
n, err = r.Read(dst)
|
|
assert.Equal(t, io.EOF, err)
|
|
assert.Equal(t, 0, n)
|
|
|
|
// Test Seek Back to start
|
|
dst = make([]byte, 10)
|
|
pos, err = r.Seek(0, io.SeekStart)
|
|
assert.Nil(t, err)
|
|
require.Equal(t, 0, int(pos))
|
|
|
|
n, err = r.Read(dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 10, n)
|
|
require.Equal(t, b, dst)
|
|
|
|
// Test partial read
|
|
buf = bytes.NewBuffer(b)
|
|
r = NewRepeatableReader(buf)
|
|
dst = make([]byte, 5)
|
|
n, err = r.Read(dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 5, n)
|
|
require.Equal(t, b[0:5], dst)
|
|
n, err = r.Read(dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 5, n)
|
|
require.Equal(t, b[5:], dst)
|
|
|
|
// Test Seek
|
|
buf = bytes.NewBuffer(b)
|
|
r = NewRepeatableReader(buf)
|
|
// Should not allow seek past cache index
|
|
pos, err = r.Seek(5, io.SeekCurrent)
|
|
assert.NotNil(t, err)
|
|
assert.Equal(t, "fs.RepeatableReader.Seek: offset is unavailable", err.Error())
|
|
assert.Equal(t, 0, int(pos))
|
|
|
|
// Should not allow seek to negative position start
|
|
pos, err = r.Seek(-1, io.SeekCurrent)
|
|
assert.NotNil(t, err)
|
|
assert.Equal(t, "fs.RepeatableReader.Seek: negative position", err.Error())
|
|
assert.Equal(t, 0, int(pos))
|
|
|
|
// Should not allow seek with invalid whence
|
|
pos, err = r.Seek(0, 3)
|
|
assert.NotNil(t, err)
|
|
assert.Equal(t, "fs.RepeatableReader.Seek: invalid whence", err.Error())
|
|
assert.Equal(t, 0, int(pos))
|
|
|
|
// Should seek from index with io.SeekCurrent(1) whence
|
|
dst = make([]byte, 5)
|
|
_, _ = r.Read(dst)
|
|
pos, err = r.Seek(-3, io.SeekCurrent)
|
|
assert.Nil(t, err)
|
|
require.Equal(t, 2, int(pos))
|
|
pos, err = r.Seek(1, io.SeekCurrent)
|
|
assert.Nil(t, err)
|
|
require.Equal(t, 3, int(pos))
|
|
|
|
// Should seek from cache end with io.SeekEnd(2) whence
|
|
pos, err = r.Seek(-3, io.SeekEnd)
|
|
assert.Nil(t, err)
|
|
require.Equal(t, 2, int(pos))
|
|
|
|
// Should read from seek postion and past it
|
|
dst = make([]byte, 5)
|
|
n, err = io.ReadFull(r, dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 5, n)
|
|
assert.Equal(t, b[2:7], dst)
|
|
|
|
}
|