From 9c81f6f179375a6cb03b779ef287d94072a3307b Mon Sep 17 00:00:00 2001
From: Jarek Kowalski <jaak@jkowalski.net>
Date: Thu, 1 Nov 2018 23:02:38 -0700
Subject: [PATCH] block: added block_index_recovery_test.go

---
 block/block_index_recovery_test.go | 90 ++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 block/block_index_recovery_test.go

diff --git a/block/block_index_recovery_test.go b/block/block_index_recovery_test.go
new file mode 100644
index 0000000000..d42cdc6720
--- /dev/null
+++ b/block/block_index_recovery_test.go
@@ -0,0 +1,90 @@
+package block
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/kopia/repo/storage"
+)
+
+func TestBlockIndexRecovery(t *testing.T) {
+	ctx := context.Background()
+	data := map[string][]byte{}
+	keyTime := map[string]time.Time{}
+	bm := newTestBlockManager(data, keyTime, nil)
+	block1 := writeBlockAndVerify(ctx, t, bm, seededRandomData(10, 100))
+	block2 := writeBlockAndVerify(ctx, t, bm, seededRandomData(11, 100))
+	block3 := writeBlockAndVerify(ctx, t, bm, seededRandomData(12, 100))
+
+	if err := bm.Flush(ctx); err != nil {
+		t.Errorf("flush error: %v", err)
+	}
+
+	// delete all index blocks
+	bm.st.ListBlocks(ctx, newIndexBlockPrefix, func(bi storage.BlockMetadata) error {
+		log.Debugf("deleting %v", bi.BlockID)
+		return bm.st.DeleteBlock(ctx, bi.BlockID)
+	})
+
+	// now with index blocks gone, all blocks appear to not be found
+	bm = newTestBlockManager(data, keyTime, nil)
+	verifyBlockNotFound(ctx, t, bm, block1)
+	verifyBlockNotFound(ctx, t, bm, block2)
+	verifyBlockNotFound(ctx, t, bm, block3)
+
+	totalRecovered := 0
+
+	// pass 1 - just list blocks to recover, but don't commit
+	err := bm.st.ListBlocks(ctx, PackBlockPrefix, func(bi storage.BlockMetadata) error {
+		infos, err := bm.RecoverIndexFromPackFile(ctx, bi.BlockID, bi.Length, false)
+		if err != nil {
+			return err
+		}
+		totalRecovered += len(infos)
+		log.Debugf("recovered %v blocks", len(infos))
+		return nil
+	})
+	if err != nil {
+		t.Errorf("error recovering: %v", err)
+	}
+
+	if got, want := totalRecovered, 3; got != want {
+		t.Errorf("invalid # of blocks recovered: %v, want %v", got, want)
+	}
+
+	// blocks are stil not found
+	verifyBlockNotFound(ctx, t, bm, block1)
+	verifyBlockNotFound(ctx, t, bm, block2)
+	verifyBlockNotFound(ctx, t, bm, block3)
+
+	// pass 2 now pass commit=true to add recovered blocks to index
+	totalRecovered = 0
+
+	err = bm.st.ListBlocks(ctx, PackBlockPrefix, func(bi storage.BlockMetadata) error {
+		infos, err := bm.RecoverIndexFromPackFile(ctx, bi.BlockID, bi.Length, true)
+		if err != nil {
+			return err
+		}
+		totalRecovered += len(infos)
+		log.Debugf("recovered %v blocks", len(infos))
+		return nil
+	})
+	if err != nil {
+		t.Errorf("error recovering: %v", err)
+	}
+
+	if got, want := totalRecovered, 3; got != want {
+		t.Errorf("invalid # of blocks recovered: %v, want %v", got, want)
+	}
+
+	verifyBlock(ctx, t, bm, block1, seededRandomData(10, 100))
+	verifyBlock(ctx, t, bm, block2, seededRandomData(11, 100))
+	verifyBlock(ctx, t, bm, block3, seededRandomData(12, 100))
+	if err := bm.Flush(ctx); err != nil {
+		t.Errorf("flush error: %v", err)
+	}
+	verifyBlock(ctx, t, bm, block1, seededRandomData(10, 100))
+	verifyBlock(ctx, t, bm, block2, seededRandomData(11, 100))
+	verifyBlock(ctx, t, bm, block3, seededRandomData(12, 100))
+}