mirror of
https://github.com/rclone/rclone.git
synced 2024-11-22 16:34:30 +01:00
310 lines
7.0 KiB
Go
310 lines
7.0 KiB
Go
package pool
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"io"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/rclone/rclone/lib/random"
|
|
"github.com/stretchr/testify/assert"
|
|
)
|
|
|
|
const blockSize = 4096
|
|
|
|
var rwPool = New(60*time.Second, blockSize, 2, false)
|
|
|
|
// A writer that always returns an error
|
|
type testWriterError struct{}
|
|
|
|
var errWriteError = errors.New("write error")
|
|
|
|
func (testWriterError) Write(p []byte) (n int, err error) {
|
|
return 0, errWriteError
|
|
}
|
|
|
|
func TestRW(t *testing.T) {
|
|
var dst []byte
|
|
var pos int64
|
|
var err error
|
|
var n int
|
|
|
|
testData := []byte("Goodness!!") // 10 bytes long
|
|
|
|
newRW := func() *RW {
|
|
rw := NewRW(rwPool)
|
|
buf := bytes.NewBuffer(testData)
|
|
nn, err := rw.ReadFrom(buf) // fill up with goodness
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, int64(10), nn)
|
|
assert.Equal(t, int64(10), rw.Size())
|
|
return rw
|
|
}
|
|
|
|
close := func(rw *RW) {
|
|
assert.NoError(t, rw.Close())
|
|
}
|
|
|
|
t.Run("Empty", func(t *testing.T) {
|
|
// Test empty read
|
|
rw := NewRW(rwPool)
|
|
defer close(rw)
|
|
assert.Equal(t, int64(0), rw.Size())
|
|
|
|
dst = make([]byte, 10)
|
|
n, err = rw.Read(dst)
|
|
assert.Equal(t, io.EOF, err)
|
|
assert.Equal(t, 0, n)
|
|
assert.Equal(t, int64(0), rw.Size())
|
|
})
|
|
|
|
t.Run("Full", func(t *testing.T) {
|
|
rw := newRW()
|
|
defer close(rw)
|
|
|
|
// Test full read
|
|
dst = make([]byte, 100)
|
|
n, err = rw.Read(dst)
|
|
assert.Equal(t, io.EOF, err)
|
|
assert.Equal(t, 10, n)
|
|
assert.Equal(t, testData, dst[0:10])
|
|
|
|
// Test read EOF
|
|
n, err = rw.Read(dst)
|
|
assert.Equal(t, io.EOF, err)
|
|
assert.Equal(t, 0, n)
|
|
|
|
// Test Seek Back to start
|
|
dst = make([]byte, 10)
|
|
pos, err = rw.Seek(0, io.SeekStart)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 0, int(pos))
|
|
|
|
// Now full read
|
|
n, err = rw.Read(dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 10, n)
|
|
assert.Equal(t, testData, dst)
|
|
})
|
|
|
|
t.Run("WriteTo", func(t *testing.T) {
|
|
rw := newRW()
|
|
defer close(rw)
|
|
var b bytes.Buffer
|
|
|
|
n, err := rw.WriteTo(&b)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, int64(10), n)
|
|
assert.Equal(t, testData, b.Bytes())
|
|
})
|
|
|
|
t.Run("WriteToError", func(t *testing.T) {
|
|
rw := newRW()
|
|
defer close(rw)
|
|
w := testWriterError{}
|
|
|
|
n, err := rw.WriteTo(w)
|
|
assert.Equal(t, errWriteError, err)
|
|
assert.Equal(t, int64(0), n)
|
|
})
|
|
|
|
t.Run("Partial", func(t *testing.T) {
|
|
// Test partial read
|
|
rw := newRW()
|
|
defer close(rw)
|
|
|
|
dst = make([]byte, 5)
|
|
n, err = rw.Read(dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 5, n)
|
|
assert.Equal(t, testData[0:5], dst)
|
|
n, err = rw.Read(dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 5, n)
|
|
assert.Equal(t, testData[5:], dst)
|
|
})
|
|
|
|
t.Run("Seek", func(t *testing.T) {
|
|
// Test Seek
|
|
rw := newRW()
|
|
defer close(rw)
|
|
|
|
// Seek to end
|
|
pos, err = rw.Seek(10, io.SeekStart)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, int64(10), pos)
|
|
|
|
// Seek to start
|
|
pos, err = rw.Seek(0, io.SeekStart)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, int64(0), pos)
|
|
|
|
// Should not allow seek past cache index
|
|
pos, err = rw.Seek(11, io.SeekCurrent)
|
|
assert.Equal(t, errSeekPastEnd, err)
|
|
assert.Equal(t, 10, int(pos))
|
|
|
|
// Should not allow seek to negative position start
|
|
pos, err = rw.Seek(-1, io.SeekCurrent)
|
|
assert.Equal(t, errNegativeSeek, err)
|
|
assert.Equal(t, 0, int(pos))
|
|
|
|
// Should not allow seek with invalid whence
|
|
pos, err = rw.Seek(0, 3)
|
|
assert.Equal(t, errInvalidWhence, err)
|
|
assert.Equal(t, 0, int(pos))
|
|
|
|
// Should seek from index with io.SeekCurrent(1) whence
|
|
dst = make([]byte, 5)
|
|
_, _ = rw.Read(dst)
|
|
pos, err = rw.Seek(-3, io.SeekCurrent)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 2, int(pos))
|
|
pos, err = rw.Seek(1, io.SeekCurrent)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 3, int(pos))
|
|
|
|
// Should seek from cache end with io.SeekEnd(2) whence
|
|
pos, err = rw.Seek(-3, io.SeekEnd)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 7, int(pos))
|
|
|
|
// Should read from seek position and past it
|
|
dst = make([]byte, 3)
|
|
n, err = io.ReadFull(rw, dst)
|
|
assert.Nil(t, err)
|
|
assert.Equal(t, 3, n)
|
|
assert.Equal(t, testData[7:10], dst)
|
|
})
|
|
}
|
|
|
|
// A reader to read in chunkSize chunks
|
|
type testReader struct {
|
|
data []byte
|
|
chunkSize int
|
|
}
|
|
|
|
// Read in chunkSize chunks
|
|
func (r *testReader) Read(p []byte) (n int, err error) {
|
|
if len(r.data) == 0 {
|
|
return 0, io.EOF
|
|
}
|
|
chunkSize := r.chunkSize
|
|
if chunkSize > len(r.data) {
|
|
chunkSize = len(r.data)
|
|
}
|
|
n = copy(p, r.data[:chunkSize])
|
|
r.data = r.data[n:]
|
|
return n, nil
|
|
}
|
|
|
|
// A writer to write in chunkSize chunks
|
|
type testWriter struct {
|
|
t *testing.T
|
|
data []byte
|
|
chunkSize int
|
|
buf []byte
|
|
offset int
|
|
}
|
|
|
|
// Write in chunkSize chunks
|
|
func (w *testWriter) Write(p []byte) (n int, err error) {
|
|
if w.buf == nil {
|
|
w.buf = make([]byte, w.chunkSize)
|
|
}
|
|
n = copy(w.buf, p)
|
|
assert.Equal(w.t, w.data[w.offset:w.offset+n], w.buf[:n])
|
|
w.offset += n
|
|
return n, nil
|
|
}
|
|
|
|
func TestRWBoundaryConditions(t *testing.T) {
|
|
maxSize := 3 * blockSize
|
|
buf := []byte(random.String(maxSize))
|
|
|
|
sizes := []int{
|
|
1, 2, 3,
|
|
blockSize - 2, blockSize - 1, blockSize, blockSize + 1, blockSize + 2,
|
|
2*blockSize - 2, 2*blockSize - 1, 2 * blockSize, 2*blockSize + 1, 2*blockSize + 2,
|
|
3*blockSize - 2, 3*blockSize - 1, 3 * blockSize,
|
|
}
|
|
|
|
// Write the data in chunkSize chunks
|
|
write := func(rw *RW, data []byte, chunkSize int) {
|
|
writeData := data
|
|
for len(writeData) > 0 {
|
|
i := chunkSize
|
|
if i > len(writeData) {
|
|
i = len(writeData)
|
|
}
|
|
nn, err := rw.Write(writeData[:i])
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, len(writeData[:i]), nn)
|
|
writeData = writeData[nn:]
|
|
}
|
|
}
|
|
|
|
// Write the data in chunkSize chunks using ReadFrom
|
|
readFrom := func(rw *RW, data []byte, chunkSize int) {
|
|
nn, err := rw.ReadFrom(&testReader{
|
|
data: data,
|
|
chunkSize: chunkSize,
|
|
})
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, int64(len(data)), nn)
|
|
}
|
|
|
|
// Read the data back and check it is OK in chunkSize chunks
|
|
read := func(rw *RW, data []byte, chunkSize int) {
|
|
size := len(data)
|
|
buf := make([]byte, chunkSize)
|
|
offset := 0
|
|
for {
|
|
nn, err := rw.Read(buf)
|
|
expectedRead := len(buf)
|
|
if offset+chunkSize > size {
|
|
expectedRead = size - offset
|
|
assert.Equal(t, err, io.EOF)
|
|
} else {
|
|
assert.NoError(t, err)
|
|
}
|
|
assert.Equal(t, expectedRead, nn)
|
|
assert.Equal(t, data[offset:offset+nn], buf[:nn])
|
|
offset += nn
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
// Read the data back and check it is OK in chunkSize chunks using WriteTo
|
|
writeTo := func(rw *RW, data []byte, chunkSize int) {
|
|
nn, err := rw.WriteTo(&testWriter{
|
|
t: t,
|
|
data: data,
|
|
chunkSize: chunkSize,
|
|
})
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, int64(len(data)), nn)
|
|
}
|
|
|
|
// Read and Write the data with a range of block sizes and functions
|
|
for _, writeFn := range []func(*RW, []byte, int){write, readFrom} {
|
|
for _, readFn := range []func(*RW, []byte, int){read, writeTo} {
|
|
for _, size := range sizes {
|
|
data := buf[:size]
|
|
for _, chunkSize := range sizes {
|
|
//t.Logf("Testing size=%d chunkSize=%d", useWrite, size, chunkSize)
|
|
rw := NewRW(rwPool)
|
|
assert.Equal(t, int64(0), rw.Size())
|
|
writeFn(rw, data, chunkSize)
|
|
assert.Equal(t, int64(size), rw.Size())
|
|
readFn(rw, data, chunkSize)
|
|
assert.NoError(t, rw.Close())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|