backupds: Add unit tests

lib/backupds/backupds_test.go

@@ -0,0 +1,85 @@
+package backupds
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/ipfs/go-datastore"
+	"github.com/stretchr/testify/require"
+)
+
+const valSize = 512 << 10
+
+func putVals(t *testing.T, ds datastore.Datastore, start, end int) {
+	for i := start; i < end; i++ {
+		err := ds.Put(datastore.NewKey(fmt.Sprintf("%d", i)), []byte(fmt.Sprintf("%d-%s", i, strings.Repeat("~", valSize))))
+		require.NoError(t, err)
+	}
+}
+
+func checkVals(t *testing.T, ds datastore.Datastore, start, end int, exist bool) {
+	for i := start; i < end; i++ {
+		v, err := ds.Get(datastore.NewKey(fmt.Sprintf("%d", i)))
+		if exist {
+			require.NoError(t, err)
+			expect := []byte(fmt.Sprintf("%d-%s", i, strings.Repeat("~", valSize)))
+			require.EqualValues(t, expect, v)
+		} else {
+			require.ErrorIs(t, err, datastore.ErrNotFound)
+		}
+	}
+}
+
+func TestNoLogRestore(t *testing.T) {
+	ds1 := datastore.NewMapDatastore()
+
+	putVals(t, ds1, 0, 10)
+
+	bds, err := Wrap(ds1, NoLogdir)
+	require.NoError(t, err)
+
+	var bup bytes.Buffer
+	require.NoError(t, bds.Backup(&bup))
+
+	putVals(t, ds1, 10, 20)
+
+	ds2 := datastore.NewMapDatastore()
+	require.NoError(t, RestoreInto(&bup, ds2))
+
+	checkVals(t, ds2, 0, 10, true)
+	checkVals(t, ds2, 10, 20, false)
+}
+
+func TestLogRestore(t *testing.T) {
+	logdir, err := ioutil.TempDir("", "backupds-test-")
+	require.NoError(t, err)
+	defer os.RemoveAll(logdir) // nolint
+
+	ds1 := datastore.NewMapDatastore()
+
+	putVals(t, ds1, 0, 10)
+
+	bds, err := Wrap(ds1, logdir)
+	require.NoError(t, err)
+
+	putVals(t, bds, 10, 20)
+
+	require.NoError(t, bds.Close())
+
+	fls, err := ioutil.ReadDir(logdir)
+	require.NoError(t, err)
+	require.Equal(t, 1, len(fls))
+
+	bf, err := ioutil.ReadFile(filepath.Join(logdir, fls[0].Name()))
+	require.NoError(t, err)
+
+	ds2 := datastore.NewMapDatastore()
+	require.NoError(t, RestoreInto(bytes.NewReader(bf), ds2))
+
+	checkVals(t, ds2, 0, 20, true)
+}