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126 Zeilen
3.5 KiB
126 Zeilen
3.5 KiB
// Copyright (c) 2019 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include <cstdint>
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#include <cstdlib>
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#include <iostream>
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#include <memory>
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#include <string>
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#include <vector>
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#include "gtest/gtest.h"
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#include "leveldb/db.h"
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#include "leveldb/write_batch.h"
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#include "util/testutil.h"
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namespace leveldb {
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namespace {
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// Creates a random number in the range of [0, max).
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int GenerateRandomNumber(int max) { return std::rand() % max; }
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std::string CreateRandomString(int32_t index) {
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static const size_t len = 1024;
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char bytes[len];
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size_t i = 0;
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while (i < 8) {
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bytes[i] = 'a' + ((index >> (4 * i)) & 0xf);
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++i;
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}
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while (i < sizeof(bytes)) {
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bytes[i] = 'a' + GenerateRandomNumber(26);
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++i;
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}
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return std::string(bytes, sizeof(bytes));
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}
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} // namespace
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TEST(Issue320, Test) {
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std::srand(0);
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bool delete_before_put = false;
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bool keep_snapshots = true;
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std::vector<std::unique_ptr<std::pair<std::string, std::string>>> test_map(
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10000);
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std::vector<Snapshot const*> snapshots(100, nullptr);
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DB* db;
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Options options;
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options.create_if_missing = true;
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std::string dbpath = testing::TempDir() + "leveldb_issue320_test";
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ASSERT_LEVELDB_OK(DB::Open(options, dbpath, &db));
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uint32_t target_size = 10000;
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uint32_t num_items = 0;
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uint32_t count = 0;
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std::string key;
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std::string value, old_value;
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WriteOptions writeOptions;
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ReadOptions readOptions;
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while (count < 200000) {
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if ((++count % 1000) == 0) {
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std::cout << "count: " << count << std::endl;
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}
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int index = GenerateRandomNumber(test_map.size());
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WriteBatch batch;
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if (test_map[index] == nullptr) {
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num_items++;
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test_map[index].reset(new std::pair<std::string, std::string>(
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CreateRandomString(index), CreateRandomString(index)));
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batch.Put(test_map[index]->first, test_map[index]->second);
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} else {
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ASSERT_LEVELDB_OK(
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db->Get(readOptions, test_map[index]->first, &old_value));
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if (old_value != test_map[index]->second) {
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std::cout << "ERROR incorrect value returned by Get" << std::endl;
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std::cout << " count=" << count << std::endl;
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std::cout << " old value=" << old_value << std::endl;
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std::cout << " test_map[index]->second=" << test_map[index]->second
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<< std::endl;
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std::cout << " test_map[index]->first=" << test_map[index]->first
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<< std::endl;
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std::cout << " index=" << index << std::endl;
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ASSERT_EQ(old_value, test_map[index]->second);
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}
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if (num_items >= target_size && GenerateRandomNumber(100) > 30) {
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batch.Delete(test_map[index]->first);
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test_map[index] = nullptr;
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--num_items;
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} else {
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test_map[index]->second = CreateRandomString(index);
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if (delete_before_put) batch.Delete(test_map[index]->first);
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batch.Put(test_map[index]->first, test_map[index]->second);
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}
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}
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ASSERT_LEVELDB_OK(db->Write(writeOptions, &batch));
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if (keep_snapshots && GenerateRandomNumber(10) == 0) {
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int i = GenerateRandomNumber(snapshots.size());
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if (snapshots[i] != nullptr) {
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db->ReleaseSnapshot(snapshots[i]);
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}
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snapshots[i] = db->GetSnapshot();
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}
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}
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for (Snapshot const* snapshot : snapshots) {
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if (snapshot) {
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db->ReleaseSnapshot(snapshot);
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}
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}
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delete db;
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DestroyDB(dbpath, options);
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}
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} // namespace leveldb
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