rclone/cmd/bisync/delta_list_test.go

package bisync

import (
	"errors"
	"os"
	"path/filepath"
	"testing"
	"time"

	"github.com/rclone/rclone/fs/hash"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func testListing() *fileList {
	ls := newFileList()
	ls.hash = hash.MD5
	t0 := time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC)
	ls.put("keep.txt", 10, t0, "aaa", "", "-")
	ls.put("gone.txt", 20, t0, "bbb", "", "-")
	ls.put("dir/a.txt", 30, t0, "ccc", "", "-")
	ls.put("dir/b.txt", 40, t0, "ddd", "", "-")
	ls.put("dir", 0, t0, "", "", "d")
	return ls
}

func TestApplyListingDeltas_UpsertAndDelete(t *testing.T) {
	ls := testListing()
	t1 := time.Date(2024, 2, 1, 0, 0, 0, 0, time.UTC)
	err := applyListingDeltas(ls, []listingDelta{
		{Remote: "keep.txt", Size: 11, ModTime: t1, Hash: "zzz", Flags: "-"},
		{Remote: "new.txt", Size: 5, ModTime: t1, Hash: "eee", Flags: "-"},
		{Remote: "gone.txt", Deleted: true},
	}, deltaApplyOpts{MaxDelete: 50})
	require.NoError(t, err)
	assert.True(t, ls.has("keep.txt"))
	assert.Equal(t, int64(11), ls.getSize("keep.txt"))
	assert.Equal(t, "zzz", ls.getHash("keep.txt"))
	assert.True(t, ls.has("new.txt"))
	assert.False(t, ls.has("gone.txt"))
	assert.True(t, ls.has("dir/a.txt"))
}

func TestApplyListingDeltas_FolderDeleteRemovesChildren(t *testing.T) {
	ls := testListing()
	err := applyListingDeltas(ls, []listingDelta{
		{Remote: "dir", Deleted: true, Flags: "d"},
	}, deltaApplyOpts{MaxDelete: 90})
	require.NoError(t, err)
	assert.False(t, ls.has("dir"))
	assert.False(t, ls.has("dir/a.txt"))
	assert.False(t, ls.has("dir/b.txt"))
	assert.True(t, ls.has("keep.txt"))
}

func TestApplyListingDeltas_MaxDeleteAbortsWithoutMutation(t *testing.T) {
	ls := testListing()
	orig := len(ls.list)
	err := applyListingDeltas(ls, []listingDelta{
		{Remote: "keep.txt", Deleted: true},
		{Remote: "gone.txt", Deleted: true},
		{Remote: "dir/a.txt", Deleted: true},
	}, deltaApplyOpts{MaxDelete: 50})
	require.Error(t, err)
	assert.True(t, errors.Is(err, errDeltaTooManyDeletes))
	assert.Equal(t, orig, len(ls.list))
	assert.True(t, ls.has("keep.txt"))
	assert.True(t, ls.has("gone.txt"))
}

func TestApplyListingDeltas_ForceBypassesMaxDelete(t *testing.T) {
	ls := testListing()
	err := applyListingDeltas(ls, []listingDelta{
		{Remote: "keep.txt", Deleted: true},
		{Remote: "gone.txt", Deleted: true},
		{Remote: "dir/a.txt", Deleted: true},
	}, deltaApplyOpts{MaxDelete: 50, Force: true})
	require.NoError(t, err)
	assert.False(t, ls.has("keep.txt"))
}

func TestApplyListingDeltas_ResetLeavesListingUntouched(t *testing.T) {
	ls := testListing()
	orig := len(ls.list)
	err := applyListingDeltas(ls, []listingDelta{
		{Remote: "keep.txt", Deleted: true},
	}, deltaApplyOpts{Reset: true, MaxDelete: 50})
	require.Error(t, err)
	assert.True(t, errors.Is(err, errDeltaCursorReset))
	assert.Equal(t, orig, len(ls.list))
	assert.True(t, ls.has("keep.txt"))
}

func TestAtomicCursorAndListing(t *testing.T) {
	dir := t.TempDir()
	listing := filepath.Join(dir, "path2.lst")
	ls := testListing()
	require.NoError(t, saveListingAndCursor(listing, "CUR1", "/Dropbox", ls))
	got, root, err := loadCursor(listing)
	require.NoError(t, err)
	assert.Equal(t, "CUR1", got)
	assert.Equal(t, "/Dropbox", root)
	ls2, err := loadListingFile(listing)
	require.NoError(t, err)
	assert.True(t, ls2.has("keep.txt"))

	require.NoError(t, saveListingAndCursor(listing, "CUR2", "/Dropbox", ls))
	got, _, err = loadCursor(listing)
	require.NoError(t, err)
	assert.Equal(t, "CUR2", got)
}

func TestLoadCursor_MissingIsEmpty(t *testing.T) {
	dir := t.TempDir()
	listing := filepath.Join(dir, "nope.lst")
	got, root, err := loadCursor(listing)
	require.NoError(t, err)
	assert.Empty(t, got)
	assert.Empty(t, root)
	_, err = os.Stat(cursorPath(listing))
	assert.True(t, os.IsNotExist(err))
}

func TestGuardFileCount(t *testing.T) {
	opt := deltaApplyOpts{MaxDelete: 50}
	require.NoError(t, guardFileCount(0, 0, opt))
	require.NoError(t, guardFileCount(100, 80, opt))
	require.ErrorIs(t, guardFileCount(100, 0, opt), errDeltaListingEmptied)
	require.ErrorIs(t, guardFileCount(100, 40, opt), errDeltaListingCollapsed)
	require.NoError(t, guardFileCount(100, 0, deltaApplyOpts{MaxDelete: 50, Force: true}))
}