src/kudu/tablet/metadata-test.cc

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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
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// specific language governing permissions and limitations
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#include <gtest/gtest.h>
#include <string>
#include <vector>

#include "kudu/common/schema.h"
#include "kudu/tablet/rowset_metadata.h"
#include "kudu/tablet/tablet_metadata.h"
#include "kudu/gutil/strings/join.h"
#include "kudu/gutil/strings/substitute.h"
#include "kudu/util/status.h"
#include "kudu/util/test_util.h"

using std::vector;
using std::string;
using strings::Substitute;

namespace kudu {
namespace tablet {

class MetadataTest : public KuduTest {
 public:
  MetadataTest() {
    all_blocks_ = { BlockId(1), BlockId(2), BlockId(3), BlockId(4) };

    tablet_meta_ = new TabletMetadata(nullptr, "fake-tablet");
    CHECK_OK(RowSetMetadata::CreateNew(tablet_meta_.get(), 0, &meta_));
    for (int i = 0; i < all_blocks_.size(); i++) {
      CHECK_OK(meta_->CommitRedoDeltaDataBlock(i, all_blocks_[i]));
    }
    CHECK_EQ(4, meta_->redo_delta_blocks().size());
  }

 protected:
  vector<BlockId> all_blocks_;
  scoped_refptr<TabletMetadata> tablet_meta_;
  gscoped_ptr<RowSetMetadata> meta_;
};

// Swap out some deltas from the middle of the list
TEST_F(MetadataTest, RSMD_TestReplaceDeltas_1) {
  vector<BlockId> to_replace;
  to_replace.push_back(BlockId(2));
  to_replace.push_back(BlockId(3));

  ASSERT_OK(meta_->CommitUpdate(
              RowSetMetadataUpdate()
              .ReplaceRedoDeltaBlocks(to_replace, { BlockId(123) })));
  ASSERT_EQ(vector<BlockId>({ BlockId(1), BlockId(123), BlockId(4) }),
            meta_->redo_delta_blocks());
}

// Swap out some deltas from the beginning of the list
TEST_F(MetadataTest, RSMD_TestReplaceDeltas_2) {
  vector<BlockId> to_replace;
  to_replace.push_back(BlockId(1));
  to_replace.push_back(BlockId(2));

  ASSERT_OK(meta_->CommitUpdate(
              RowSetMetadataUpdate()
              .ReplaceRedoDeltaBlocks(to_replace, { BlockId(123) })));
  ASSERT_EQ(vector<BlockId>({ BlockId(123), BlockId(3), BlockId(4) }),
            meta_->redo_delta_blocks());
}

// Swap out some deltas from the end of the list
TEST_F(MetadataTest, RSMD_TestReplaceDeltas_3) {
  vector<BlockId> to_replace;
  to_replace.push_back(BlockId(3));
  to_replace.push_back(BlockId(4));

  ASSERT_OK(meta_->CommitUpdate(
              RowSetMetadataUpdate()
              .ReplaceRedoDeltaBlocks(to_replace, { BlockId(123) })));
  ASSERT_EQ(vector<BlockId>({ BlockId(1), BlockId(2), BlockId(123) }),
            meta_->redo_delta_blocks());
}

// Swap out a non-contiguous list, check error.
TEST_F(MetadataTest, RSMD_TestReplaceDeltas_Bad_NonContiguous) {
  vector<BlockId> to_replace;
  to_replace.push_back(BlockId(2));
  to_replace.push_back(BlockId(4));

  Status s = meta_->CommitUpdate(
    RowSetMetadataUpdate()
    .ReplaceRedoDeltaBlocks(to_replace, { BlockId(123) }));
  EXPECT_EQ(Substitute("Invalid argument: Cannot find subsequence <$0> in <$1>",
                       BlockId::JoinStrings(to_replace),
                       BlockId::JoinStrings(all_blocks_)),
            s.ToString());

  // Should be unchanged
  EXPECT_EQ(all_blocks_, meta_->redo_delta_blocks());
}

// Swap out a list which contains an invalid element, check error.
TEST_F(MetadataTest, RSMD_TestReplaceDeltas_Bad_DoesntExist) {
  vector<BlockId> to_replace;
  to_replace.push_back(BlockId(555));

  Status s = meta_->CommitUpdate(
    RowSetMetadataUpdate()
    .ReplaceRedoDeltaBlocks(to_replace, { BlockId(123) }));
  EXPECT_EQ(Substitute("Invalid argument: Cannot find subsequence <$0> in <$1>",
                       BlockId::JoinStrings(to_replace),
                       BlockId::JoinStrings(all_blocks_)),
            s.ToString());

  // Should be unchanged
  EXPECT_EQ(all_blocks_, meta_->redo_delta_blocks());
}

} // namespace tablet
} // namespace kudu