index: move to repository package

internal/repository/index/testing.go

@@ -0,0 +1,21 @@
+package index
+
+import (
+	"testing"
+
+	"github.com/restic/restic/internal/restic"
+	"github.com/restic/restic/internal/test"
+)
+
+func TestMergeIndex(t testing.TB, mi *MasterIndex) ([]*Index, int, restic.IDSet) {
+	finalIndexes := mi.finalizeNotFinalIndexes()
+	ids := restic.NewIDSet()
+	for _, idx := range finalIndexes {
+		id := restic.NewRandomID()
+		ids.Insert(id)
+		test.OK(t, idx.SetID(id))
+	}
+
+	test.OK(t, mi.MergeFinalIndexes())
+	return finalIndexes, len(mi.idx), ids
+}