mirror of https://github.com/rclone/rclone
585 lines
14 KiB
Go
585 lines
14 KiB
Go
package vfscache
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// FIXME need to test async writeback here
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import (
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"context"
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"fmt"
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"io"
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"math/rand"
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"os"
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"sync"
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"testing"
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"time"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fstest"
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"github.com/rclone/rclone/lib/random"
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"github.com/rclone/rclone/lib/readers"
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"github.com/rclone/rclone/vfs/vfscommon"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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var zeroes = string(make([]byte, 100))
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func newItemTestCache(t *testing.T) (r *fstest.Run, c *Cache) {
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opt := vfscommon.DefaultOpt
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// Disable the cache cleaner as it interferes with these tests
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opt.CachePollInterval = 0
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// Disable synchronous write
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opt.WriteBack = 0
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return newTestCacheOpt(t, opt)
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}
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// Check the object has contents
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func checkObject(t *testing.T, r *fstest.Run, remote string, contents string) {
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obj, err := r.Fremote.NewObject(context.Background(), remote)
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require.NoError(t, err)
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in, err := obj.Open(context.Background())
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require.NoError(t, err)
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buf, err := io.ReadAll(in)
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require.NoError(t, err)
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require.NoError(t, in.Close())
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assert.Equal(t, contents, string(buf))
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}
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func newFileLength(t *testing.T, r *fstest.Run, c *Cache, remote string, length int) (contents string, obj fs.Object, item *Item) {
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contents = random.String(length)
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r.WriteObject(context.Background(), remote, contents, time.Now())
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item, _ = c.get(remote)
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obj, err := r.Fremote.NewObject(context.Background(), remote)
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require.NoError(t, err)
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return
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}
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func newFile(t *testing.T, r *fstest.Run, c *Cache, remote string) (contents string, obj fs.Object, item *Item) {
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return newFileLength(t, r, c, remote, 100)
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}
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func TestItemExists(t *testing.T) {
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_, c := newItemTestCache(t)
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item, _ := c.get("potato")
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assert.False(t, item.Exists())
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require.NoError(t, item.Open(nil))
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assert.True(t, item.Exists())
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require.NoError(t, item.Close(nil))
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assert.True(t, item.Exists())
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item.remove("test")
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assert.False(t, item.Exists())
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}
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func TestItemGetSize(t *testing.T) {
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r, c := newItemTestCache(t)
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item, _ := c.get("potato")
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require.NoError(t, item.Open(nil))
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size, err := item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(0), size)
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n, err := item.WriteAt([]byte("hello"), 0)
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require.NoError(t, err)
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assert.Equal(t, 5, n)
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size, err = item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(5), size)
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require.NoError(t, item.Close(nil))
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checkObject(t, r, "potato", "hello")
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}
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func TestItemDirty(t *testing.T) {
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r, c := newItemTestCache(t)
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item, _ := c.get("potato")
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require.NoError(t, item.Open(nil))
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assert.Equal(t, false, item.IsDirty())
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n, err := item.WriteAt([]byte("hello"), 0)
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require.NoError(t, err)
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assert.Equal(t, 5, n)
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assert.Equal(t, true, item.IsDirty())
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require.NoError(t, item.Close(nil))
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// Sync writeback so expect clean here
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assert.Equal(t, false, item.IsDirty())
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item.Dirty()
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assert.Equal(t, true, item.IsDirty())
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checkObject(t, r, "potato", "hello")
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}
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func TestItemSync(t *testing.T) {
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_, c := newItemTestCache(t)
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item, _ := c.get("potato")
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require.Error(t, item.Sync())
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require.NoError(t, item.Open(nil))
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require.NoError(t, item.Sync())
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require.NoError(t, item.Close(nil))
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}
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func TestItemTruncateNew(t *testing.T) {
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r, c := newItemTestCache(t)
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item, _ := c.get("potato")
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require.Error(t, item.Truncate(0))
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require.NoError(t, item.Open(nil))
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require.NoError(t, item.Truncate(100))
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size, err := item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(100), size)
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// Check the Close callback works
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callbackCalled := false
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callback := func(o fs.Object) {
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callbackCalled = true
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assert.Equal(t, "potato", o.Remote())
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assert.Equal(t, int64(100), o.Size())
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}
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require.NoError(t, item.Close(callback))
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assert.True(t, callbackCalled)
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checkObject(t, r, "potato", zeroes)
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}
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func TestItemTruncateExisting(t *testing.T) {
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r, c := newItemTestCache(t)
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contents, obj, item := newFile(t, r, c, "existing")
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require.Error(t, item.Truncate(40))
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checkObject(t, r, "existing", contents)
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require.NoError(t, item.Open(obj))
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require.NoError(t, item.Truncate(40))
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require.NoError(t, item.Truncate(60))
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require.NoError(t, item.Close(nil))
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checkObject(t, r, "existing", contents[:40]+zeroes[:20])
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}
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func TestItemReadAt(t *testing.T) {
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r, c := newItemTestCache(t)
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contents, obj, item := newFile(t, r, c, "existing")
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buf := make([]byte, 10)
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_, err := item.ReadAt(buf, 10)
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require.Error(t, err)
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require.NoError(t, item.Open(obj))
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n, err := item.ReadAt(buf, 10)
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assert.Equal(t, 10, n)
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require.NoError(t, err)
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assert.Equal(t, contents[10:20], string(buf[:n]))
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n, err = item.ReadAt(buf, 95)
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assert.Equal(t, 5, n)
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assert.Equal(t, io.EOF, err)
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assert.Equal(t, contents[95:], string(buf[:n]))
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n, err = item.ReadAt(buf, 1000)
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assert.Equal(t, 0, n)
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assert.Equal(t, io.EOF, err)
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assert.Equal(t, contents[:0], string(buf[:n]))
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n, err = item.ReadAt(buf, -1)
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assert.Equal(t, 0, n)
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assert.Equal(t, io.EOF, err)
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assert.Equal(t, contents[:0], string(buf[:n]))
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require.NoError(t, item.Close(nil))
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}
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func TestItemWriteAtNew(t *testing.T) {
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r, c := newItemTestCache(t)
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item, _ := c.get("potato")
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buf := make([]byte, 10)
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_, err := item.WriteAt(buf, 10)
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require.Error(t, err)
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require.NoError(t, item.Open(nil))
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assert.Equal(t, int64(0), item.getDiskSize())
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n, err := item.WriteAt([]byte("HELLO"), 10)
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require.NoError(t, err)
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assert.Equal(t, 5, n)
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// FIXME we account for the sparse data we've "written" to
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// disk here so this is actually 5 bytes higher than expected
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assert.Equal(t, int64(15), item.getDiskSize())
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n, err = item.WriteAt([]byte("THEND"), 20)
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require.NoError(t, err)
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assert.Equal(t, 5, n)
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assert.Equal(t, int64(25), item.getDiskSize())
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require.NoError(t, item.Close(nil))
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checkObject(t, r, "potato", zeroes[:10]+"HELLO"+zeroes[:5]+"THEND")
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}
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func TestItemWriteAtExisting(t *testing.T) {
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r, c := newItemTestCache(t)
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contents, obj, item := newFile(t, r, c, "existing")
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require.NoError(t, item.Open(obj))
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n, err := item.WriteAt([]byte("HELLO"), 10)
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require.NoError(t, err)
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assert.Equal(t, 5, n)
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n, err = item.WriteAt([]byte("THEND"), 95)
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require.NoError(t, err)
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assert.Equal(t, 5, n)
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n, err = item.WriteAt([]byte("THEVERYEND"), 120)
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require.NoError(t, err)
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assert.Equal(t, 10, n)
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require.NoError(t, item.Close(nil))
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checkObject(t, r, "existing", contents[:10]+"HELLO"+contents[15:95]+"THEND"+zeroes[:20]+"THEVERYEND")
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}
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func TestItemLoadMeta(t *testing.T) {
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r, c := newItemTestCache(t)
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contents, obj, item := newFile(t, r, c, "existing")
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_ = contents
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// Open the object to create metadata for it
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require.NoError(t, item.Open(obj))
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require.NoError(t, item.Close(nil))
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info := item.info
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// Remove the item from the cache
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c.mu.Lock()
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delete(c.item, item.name)
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c.mu.Unlock()
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// Reload the item so we have to load the metadata
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item2, _ := c._get("existing")
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require.NoError(t, item2.Open(obj))
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info2 := item.info
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require.NoError(t, item2.Close(nil))
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// Check that the item is different
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assert.NotEqual(t, item, item2)
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// ... but the info is the same
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assert.Equal(t, info, info2)
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}
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func TestItemReload(t *testing.T) {
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r, c := newItemTestCache(t)
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contents, obj, item := newFile(t, r, c, "existing")
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_ = contents
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// Open the object to create metadata for it
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require.NoError(t, item.Open(obj))
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// Make it dirty
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n, err := item.WriteAt([]byte("THEENDMYFRIEND"), 95)
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require.NoError(t, err)
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assert.Equal(t, 14, n)
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assert.True(t, item.IsDirty())
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// Close the file to pacify Windows, but don't call item.Close()
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item.mu.Lock()
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require.NoError(t, item.fd.Close())
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item.fd = nil
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item.mu.Unlock()
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// Remove the item from the cache
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c.mu.Lock()
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delete(c.item, item.name)
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c.mu.Unlock()
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// Reload the item so we have to load the metadata and restart
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// the transfer
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item2, _ := c._get("existing")
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require.NoError(t, item2.reload(context.Background()))
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assert.False(t, item2.IsDirty())
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// Check that the item is different
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assert.NotEqual(t, item, item2)
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// And check the contents got written back to the remote
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checkObject(t, r, "existing", contents[:95]+"THEENDMYFRIEND")
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// And check that AddVirtual was called
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assert.Equal(t, []avInfo{
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{Remote: "existing", Size: 109, IsDir: false},
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}, avInfos)
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}
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func TestItemReloadRemoteGone(t *testing.T) {
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r, c := newItemTestCache(t)
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contents, obj, item := newFile(t, r, c, "existing")
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_ = contents
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// Open the object to create metadata for it
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require.NoError(t, item.Open(obj))
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size, err := item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(100), size)
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// Read something to instantiate the cache file
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buf := make([]byte, 10)
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_, err = item.ReadAt(buf, 10)
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require.NoError(t, err)
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// Test cache file present
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_, err = os.Stat(item.c.toOSPath(item.name))
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require.NoError(t, err)
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require.NoError(t, item.Close(nil))
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// Remove the remote object
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require.NoError(t, obj.Remove(context.Background()))
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// Re-open with no object
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require.NoError(t, item.Open(nil))
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// Check size is now 0
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size, err = item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(0), size)
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// Test cache file is now empty
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fi, err := os.Stat(item.c.toOSPath(item.name))
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require.NoError(t, err)
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assert.Equal(t, int64(0), fi.Size())
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require.NoError(t, item.Close(nil))
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}
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func TestItemReloadCacheStale(t *testing.T) {
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r, c := newItemTestCache(t)
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contents, obj, item := newFile(t, r, c, "existing")
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// Open the object to create metadata for it
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require.NoError(t, item.Open(obj))
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size, err := item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(100), size)
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// Read something to instantiate the cache file
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buf := make([]byte, 10)
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_, err = item.ReadAt(buf, 10)
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require.NoError(t, err)
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// Test cache file present
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_, err = os.Stat(item.c.toOSPath(item.name))
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require.NoError(t, err)
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require.NoError(t, item.Close(nil))
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// Update the remote to something different
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contents2, obj, item := newFileLength(t, r, c, "existing", 110)
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assert.NotEqual(t, contents, contents2)
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// Re-open with updated object
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require.NoError(t, item.Open(obj))
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// Check size is now 110
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size, err = item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(110), size)
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// Test cache file is now correct size
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fi, err := os.Stat(item.c.toOSPath(item.name))
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require.NoError(t, err)
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assert.Equal(t, int64(110), fi.Size())
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// Write to the file to make it dirty
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// This checks we aren't re-using stale data
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n, err := item.WriteAt([]byte("HELLO"), 0)
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require.NoError(t, err)
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assert.Equal(t, 5, n)
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assert.Equal(t, true, item.IsDirty())
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require.NoError(t, item.Close(nil))
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// Now check with all that swizzling stuff around that the
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// object is correct
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checkObject(t, r, "existing", "HELLO"+contents2[5:])
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}
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func TestItemReadWrite(t *testing.T) {
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r, c := newItemTestCache(t)
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const (
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size = 50*1024*1024 + 123
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fileName = "large"
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)
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item, _ := c.get(fileName)
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require.NoError(t, item.Open(nil))
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// Create the test file
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in := readers.NewPatternReader(size)
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buf := make([]byte, 1024*1024)
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buf2 := make([]byte, 1024*1024)
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offset := int64(0)
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for {
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n, err := in.Read(buf)
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n2, err2 := item.WriteAt(buf[:n], offset)
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offset += int64(n2)
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require.NoError(t, err2)
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require.Equal(t, n, n2)
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if err == io.EOF {
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break
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}
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require.NoError(t, err)
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}
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// Check it is the right size
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readSize, err := item.GetSize()
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require.NoError(t, err)
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assert.Equal(t, int64(size), readSize)
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require.NoError(t, item.Close(nil))
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assert.False(t, item.remove(fileName))
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obj, err := r.Fremote.NewObject(context.Background(), fileName)
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require.NoError(t, err)
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assert.Equal(t, int64(size), obj.Size())
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// read and check a block of size N at offset
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// It returns eof true if the end of file has been reached
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readCheckBuf := func(t *testing.T, in io.ReadSeeker, buf, buf2 []byte, item *Item, offset int64, N int) (n int, eof bool) {
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what := fmt.Sprintf("buf=%p, buf2=%p, item=%p, offset=%d, N=%d", buf, buf2, item, offset, N)
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n, err := item.ReadAt(buf, offset)
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_, err2 := in.Seek(offset, io.SeekStart)
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require.NoError(t, err2, what)
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n2, err2 := in.Read(buf2[:n])
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require.Equal(t, n, n2, what)
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assert.Equal(t, buf[:n], buf2[:n2], what)
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assert.Equal(t, buf[:n], buf2[:n2], what)
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if err == io.EOF {
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return n, true
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}
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require.NoError(t, err, what)
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require.NoError(t, err2, what)
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return n, false
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}
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readCheck := func(t *testing.T, item *Item, offset int64, N int) (n int, eof bool) {
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return readCheckBuf(t, in, buf, buf2, item, offset, N)
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}
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// Read it back sequentially
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t.Run("Sequential", func(t *testing.T) {
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require.NoError(t, item.Open(obj))
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assert.False(t, item.present())
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offset := int64(0)
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for {
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n, eof := readCheck(t, item, offset, len(buf))
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offset += int64(n)
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if eof {
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break
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}
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}
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assert.Equal(t, int64(size), offset)
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require.NoError(t, item.Close(nil))
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assert.False(t, item.remove(fileName))
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})
|
|
|
|
// Read it back randomly
|
|
t.Run("Random", func(t *testing.T) {
|
|
require.NoError(t, item.Open(obj))
|
|
assert.False(t, item.present())
|
|
for !item.present() {
|
|
blockSize := rand.Intn(len(buf))
|
|
offset := rand.Int63n(size+2*int64(blockSize)) - int64(blockSize)
|
|
if offset < 0 {
|
|
offset = 0
|
|
}
|
|
_, _ = readCheck(t, item, offset, blockSize)
|
|
}
|
|
require.NoError(t, item.Close(nil))
|
|
assert.False(t, item.remove(fileName))
|
|
})
|
|
|
|
// Read it back randomly concurrently
|
|
t.Run("RandomConcurrent", func(t *testing.T) {
|
|
require.NoError(t, item.Open(obj))
|
|
assert.False(t, item.present())
|
|
var wg sync.WaitGroup
|
|
for i := 0; i < 8; i++ {
|
|
wg.Add(1)
|
|
go func() {
|
|
defer wg.Done()
|
|
in := readers.NewPatternReader(size)
|
|
buf := make([]byte, 1024*1024)
|
|
buf2 := make([]byte, 1024*1024)
|
|
for !item.present() {
|
|
blockSize := rand.Intn(len(buf))
|
|
offset := rand.Int63n(size+2*int64(blockSize)) - int64(blockSize)
|
|
if offset < 0 {
|
|
offset = 0
|
|
}
|
|
_, _ = readCheckBuf(t, in, buf, buf2, item, offset, blockSize)
|
|
}
|
|
}()
|
|
}
|
|
wg.Wait()
|
|
require.NoError(t, item.Close(nil))
|
|
assert.False(t, item.remove(fileName))
|
|
})
|
|
|
|
// Read it back in reverse which creates the maximum number of
|
|
// downloaders
|
|
t.Run("Reverse", func(t *testing.T) {
|
|
require.NoError(t, item.Open(obj))
|
|
assert.False(t, item.present())
|
|
offset := int64(size)
|
|
for {
|
|
blockSize := len(buf)
|
|
offset -= int64(blockSize)
|
|
if offset < 0 {
|
|
offset = 0
|
|
blockSize += int(offset)
|
|
}
|
|
_, _ = readCheck(t, item, offset, blockSize)
|
|
if offset == 0 {
|
|
break
|
|
}
|
|
}
|
|
require.NoError(t, item.Close(nil))
|
|
assert.False(t, item.remove(fileName))
|
|
})
|
|
}
|