mirror of
https://github.com/rclone/rclone.git
synced 2024-12-19 05:31:05 +01:00
88 lines
1.9 KiB
Go
88 lines
1.9 KiB
Go
|
package readers
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"io"
|
||
|
|
"testing"
|
||
|
|
|
||
|
|
"github.com/stretchr/testify/assert"
|
||
|
|
"github.com/stretchr/testify/require"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Check interface
|
||
|
|
var _ io.ReadSeeker = &FakeSeeker{}
|
||
|
|
|
||
|
|
func TestFakeSeeker(t *testing.T) {
|
||
|
|
// Test that passing in an io.ReadSeeker just passes it through
|
||
|
|
bufReader := bytes.NewReader([]byte{1})
|
||
|
|
r := NewFakeSeeker(bufReader, 5)
|
||
|
|
assert.Equal(t, r, bufReader)
|
||
|
|
|
||
|
|
in := bytes.NewBufferString("hello")
|
||
|
|
buf := make([]byte, 16)
|
||
|
|
r = NewFakeSeeker(in, 5)
|
||
|
|
assert.NotEqual(t, r, in)
|
||
|
|
|
||
|
|
// check the seek offset is as passed in
|
||
|
|
checkPos := func(pos int64) {
|
||
|
|
abs, err := r.Seek(0, io.SeekCurrent)
|
||
|
|
require.NoError(t, err)
|
||
|
|
assert.Equal(t, pos, abs)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test some seeking
|
||
|
|
checkPos(0)
|
||
|
|
|
||
|
|
abs, err := r.Seek(2, io.SeekStart)
|
||
|
|
require.NoError(t, err)
|
||
|
|
assert.Equal(t, int64(2), abs)
|
||
|
|
checkPos(2)
|
||
|
|
|
||
|
|
abs, err = r.Seek(-1, io.SeekEnd)
|
||
|
|
require.NoError(t, err)
|
||
|
|
assert.Equal(t, int64(4), abs)
|
||
|
|
checkPos(4)
|
||
|
|
|
||
|
|
// Check can't read if not at start
|
||
|
|
_, err = r.Read(buf)
|
||
|
|
require.ErrorContains(t, err, "not at start")
|
||
|
|
|
||
|
|
// Seek back to start
|
||
|
|
abs, err = r.Seek(-4, io.SeekCurrent)
|
||
|
|
require.NoError(t, err)
|
||
|
|
assert.Equal(t, int64(0), abs)
|
||
|
|
checkPos(0)
|
||
|
|
|
||
|
|
_, err = r.Seek(42, 17)
|
||
|
|
require.ErrorContains(t, err, "invalid whence")
|
||
|
|
|
||
|
|
_, err = r.Seek(-1, io.SeekStart)
|
||
|
|
require.ErrorContains(t, err, "negative position")
|
||
|
|
|
||
|
|
// Test reading now seeked back to the start
|
||
|
|
n, err := r.Read(buf)
|
||
|
|
require.NoError(t, err)
|
||
|
|
assert.Equal(t, 5, n)
|
||
|
|
assert.Equal(t, []byte("hello"), buf[:5])
|
||
|
|
|
||
|
|
// Seeking should give an error now
|
||
|
|
_, err = r.Seek(-1, io.SeekEnd)
|
||
|
|
require.ErrorContains(t, err, "after reading")
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestFakeSeekerError(t *testing.T) {
|
||
|
|
in := bytes.NewBufferString("hello")
|
||
|
|
r := NewFakeSeeker(in, 5)
|
||
|
|
assert.NotEqual(t, r, in)
|
||
|
|
|
||
|
|
buf, err := io.ReadAll(r)
|
||
|
|
require.NoError(t, err)
|
||
|
|
assert.Equal(t, []byte("hello"), buf)
|
||
|
|
|
||
|
|
_, err = r.Read(buf)
|
||
|
|
assert.Equal(t, io.EOF, err)
|
||
|
|
|
||
|
|
_, err = r.Seek(0, io.SeekStart)
|
||
|
|
assert.Equal(t, io.EOF, err)
|
||
|
|
}
|