fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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660 lines
18 KiB
660 lines
18 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include <array>
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#include <map>
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#include <string>
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#include "memtable/stl_wrappers.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "test_util/testharness.h"
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#include "test_util/testutil.h"
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#include "util/hash.h"
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#include "util/kv_map.h"
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#include "util/string_util.h"
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#include "utilities/merge_operators.h"
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using std::unique_ptr;
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namespace rocksdb {
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namespace {
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static const Comparator* kTestComparator = nullptr;
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class KVIter : public Iterator {
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public:
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explicit KVIter(const stl_wrappers::KVMap* map)
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: map_(map), iter_(map_->end()) {}
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bool Valid() const override { return iter_ != map_->end(); }
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void SeekToFirst() override { iter_ = map_->begin(); }
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void SeekToLast() override {
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if (map_->empty()) {
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iter_ = map_->end();
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} else {
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iter_ = map_->find(map_->rbegin()->first);
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}
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}
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void Seek(const Slice& k) override {
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iter_ = map_->lower_bound(k.ToString());
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}
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void SeekForPrev(const Slice& k) override {
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iter_ = map_->upper_bound(k.ToString());
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Prev();
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}
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void Next() override { ++iter_; }
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void Prev() override {
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if (iter_ == map_->begin()) {
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iter_ = map_->end();
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return;
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}
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--iter_;
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}
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Slice key() const override { return iter_->first; }
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Slice value() const override { return iter_->second; }
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Status status() const override { return Status::OK(); }
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private:
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const stl_wrappers::KVMap* const map_;
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stl_wrappers::KVMap::const_iterator iter_;
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};
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void AssertItersEqual(Iterator* iter1, Iterator* iter2) {
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ASSERT_EQ(iter1->Valid(), iter2->Valid());
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if (iter1->Valid()) {
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ASSERT_EQ(iter1->key().ToString(), iter2->key().ToString());
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ASSERT_EQ(iter1->value().ToString(), iter2->value().ToString());
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}
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}
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// Measuring operations on DB (expect to be empty).
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// source_strings are candidate keys
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void DoRandomIteraratorTest(DB* db, std::vector<std::string> source_strings,
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Random* rnd, int num_writes, int num_iter_ops,
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int num_trigger_flush) {
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stl_wrappers::KVMap map((stl_wrappers::LessOfComparator(kTestComparator)));
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for (int i = 0; i < num_writes; i++) {
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if (num_trigger_flush > 0 && i != 0 && i % num_trigger_flush == 0) {
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db->Flush(FlushOptions());
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}
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int type = rnd->Uniform(2);
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int index = rnd->Uniform(static_cast<int>(source_strings.size()));
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auto& key = source_strings[index];
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switch (type) {
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case 0:
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// put
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map[key] = key;
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ASSERT_OK(db->Put(WriteOptions(), key, key));
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break;
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case 1:
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// delete
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if (map.find(key) != map.end()) {
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map.erase(key);
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}
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ASSERT_OK(db->Delete(WriteOptions(), key));
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break;
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default:
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assert(false);
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}
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}
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std::unique_ptr<Iterator> iter(db->NewIterator(ReadOptions()));
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std::unique_ptr<Iterator> result_iter(new KVIter(&map));
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bool is_valid = false;
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for (int i = 0; i < num_iter_ops; i++) {
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// Random walk and make sure iter and result_iter returns the
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// same key and value
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int type = rnd->Uniform(6);
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ASSERT_OK(iter->status());
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switch (type) {
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case 0:
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// Seek to First
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iter->SeekToFirst();
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result_iter->SeekToFirst();
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break;
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case 1:
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// Seek to last
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iter->SeekToLast();
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result_iter->SeekToLast();
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break;
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case 2: {
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// Seek to random key
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auto key_idx = rnd->Uniform(static_cast<int>(source_strings.size()));
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auto key = source_strings[key_idx];
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iter->Seek(key);
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result_iter->Seek(key);
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break;
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}
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case 3:
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// Next
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if (is_valid) {
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iter->Next();
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result_iter->Next();
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} else {
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continue;
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}
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break;
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case 4:
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// Prev
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if (is_valid) {
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iter->Prev();
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result_iter->Prev();
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} else {
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continue;
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}
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break;
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default: {
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assert(type == 5);
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auto key_idx = rnd->Uniform(static_cast<int>(source_strings.size()));
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auto key = source_strings[key_idx];
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std::string result;
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auto status = db->Get(ReadOptions(), key, &result);
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if (map.find(key) == map.end()) {
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ASSERT_TRUE(status.IsNotFound());
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} else {
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ASSERT_EQ(map[key], result);
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}
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break;
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}
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}
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AssertItersEqual(iter.get(), result_iter.get());
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is_valid = iter->Valid();
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}
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}
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class DoubleComparator : public Comparator {
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public:
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DoubleComparator() {}
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const char* Name() const override { return "DoubleComparator"; }
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int Compare(const Slice& a, const Slice& b) const override {
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#ifndef CYGWIN
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double da = std::stod(a.ToString());
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double db = std::stod(b.ToString());
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#else
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double da = std::strtod(a.ToString().c_str(), 0 /* endptr */);
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double db = std::strtod(a.ToString().c_str(), 0 /* endptr */);
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#endif
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if (da == db) {
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return a.compare(b);
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} else if (da > db) {
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return 1;
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} else {
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return -1;
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}
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}
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void FindShortestSeparator(std::string* /*start*/,
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const Slice& /*limit*/) const override {}
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void FindShortSuccessor(std::string* /*key*/) const override {}
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};
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class HashComparator : public Comparator {
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public:
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HashComparator() {}
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const char* Name() const override { return "HashComparator"; }
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int Compare(const Slice& a, const Slice& b) const override {
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uint32_t ha = Hash(a.data(), a.size(), 66);
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uint32_t hb = Hash(b.data(), b.size(), 66);
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if (ha == hb) {
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return a.compare(b);
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} else if (ha > hb) {
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return 1;
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} else {
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return -1;
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}
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}
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void FindShortestSeparator(std::string* /*start*/,
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const Slice& /*limit*/) const override {}
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void FindShortSuccessor(std::string* /*key*/) const override {}
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};
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class TwoStrComparator : public Comparator {
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public:
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TwoStrComparator() {}
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const char* Name() const override { return "TwoStrComparator"; }
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int Compare(const Slice& a, const Slice& b) const override {
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assert(a.size() >= 2);
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assert(b.size() >= 2);
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size_t size_a1 = static_cast<size_t>(a[0]);
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size_t size_b1 = static_cast<size_t>(b[0]);
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size_t size_a2 = static_cast<size_t>(a[1]);
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size_t size_b2 = static_cast<size_t>(b[1]);
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assert(size_a1 + size_a2 + 2 == a.size());
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assert(size_b1 + size_b2 + 2 == b.size());
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Slice a1 = Slice(a.data() + 2, size_a1);
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Slice b1 = Slice(b.data() + 2, size_b1);
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Slice a2 = Slice(a.data() + 2 + size_a1, size_a2);
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Slice b2 = Slice(b.data() + 2 + size_b1, size_b2);
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if (a1 != b1) {
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return a1.compare(b1);
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}
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return a2.compare(b2);
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}
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void FindShortestSeparator(std::string* /*start*/,
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const Slice& /*limit*/) const override {}
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void FindShortSuccessor(std::string* /*key*/) const override {}
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};
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} // namespace
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class ComparatorDBTest
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: public testing::Test,
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virtual public ::testing::WithParamInterface<uint32_t> {
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private:
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std::string dbname_;
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Env* env_;
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DB* db_;
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Options last_options_;
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std::unique_ptr<const Comparator> comparator_guard;
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public:
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ComparatorDBTest() : env_(Env::Default()), db_(nullptr) {
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kTestComparator = BytewiseComparator();
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dbname_ = test::PerThreadDBPath("comparator_db_test");
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BlockBasedTableOptions toptions;
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toptions.format_version = GetParam();
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last_options_.table_factory.reset(
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rocksdb::NewBlockBasedTableFactory(toptions));
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EXPECT_OK(DestroyDB(dbname_, last_options_));
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}
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~ComparatorDBTest() override {
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delete db_;
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EXPECT_OK(DestroyDB(dbname_, last_options_));
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kTestComparator = BytewiseComparator();
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}
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DB* GetDB() { return db_; }
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void SetOwnedComparator(const Comparator* cmp, bool owner = true) {
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if (owner) {
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comparator_guard.reset(cmp);
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} else {
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comparator_guard.reset();
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}
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kTestComparator = cmp;
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last_options_.comparator = cmp;
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}
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// Return the current option configuration.
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Options* GetOptions() { return &last_options_; }
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void DestroyAndReopen() {
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// Destroy using last options
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Destroy();
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ASSERT_OK(TryReopen());
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}
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void Destroy() {
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delete db_;
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db_ = nullptr;
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ASSERT_OK(DestroyDB(dbname_, last_options_));
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}
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Status TryReopen() {
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delete db_;
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db_ = nullptr;
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last_options_.create_if_missing = true;
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return DB::Open(last_options_, dbname_, &db_);
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}
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};
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INSTANTIATE_TEST_CASE_P(FormatDef, ComparatorDBTest,
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testing::Values(test::kDefaultFormatVersion));
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INSTANTIATE_TEST_CASE_P(FormatLatest, ComparatorDBTest,
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testing::Values(test::kLatestFormatVersion));
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TEST_P(ComparatorDBTest, Bytewise) {
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for (int rand_seed = 301; rand_seed < 306; rand_seed++) {
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DestroyAndReopen();
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Random rnd(rand_seed);
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DoRandomIteraratorTest(GetDB(),
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{"a", "b", "c", "d", "e", "f", "g", "h", "i"}, &rnd,
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8, 100, 3);
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}
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}
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TEST_P(ComparatorDBTest, SimpleSuffixReverseComparator) {
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SetOwnedComparator(new test::SimpleSuffixReverseComparator());
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for (int rnd_seed = 301; rnd_seed < 316; rnd_seed++) {
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Options* opt = GetOptions();
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opt->comparator = kTestComparator;
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DestroyAndReopen();
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Random rnd(rnd_seed);
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std::vector<std::string> source_strings;
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std::vector<std::string> source_prefixes;
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// Randomly generate 5 prefixes
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for (int i = 0; i < 5; i++) {
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source_prefixes.push_back(test::RandomHumanReadableString(&rnd, 8));
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}
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for (int j = 0; j < 20; j++) {
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int prefix_index = rnd.Uniform(static_cast<int>(source_prefixes.size()));
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std::string key = source_prefixes[prefix_index] +
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test::RandomHumanReadableString(&rnd, rnd.Uniform(8));
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source_strings.push_back(key);
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}
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DoRandomIteraratorTest(GetDB(), source_strings, &rnd, 30, 600, 66);
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}
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}
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TEST_P(ComparatorDBTest, Uint64Comparator) {
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SetOwnedComparator(test::Uint64Comparator(), false /* owner */);
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for (int rnd_seed = 301; rnd_seed < 316; rnd_seed++) {
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Options* opt = GetOptions();
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opt->comparator = kTestComparator;
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DestroyAndReopen();
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Random rnd(rnd_seed);
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Random64 rnd64(rnd_seed);
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std::vector<std::string> source_strings;
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// Randomly generate source keys
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for (int i = 0; i < 100; i++) {
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uint64_t r = rnd64.Next();
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std::string str;
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str.resize(8);
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memcpy(&str[0], static_cast<void*>(&r), 8);
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source_strings.push_back(str);
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}
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DoRandomIteraratorTest(GetDB(), source_strings, &rnd, 200, 1000, 66);
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}
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}
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TEST_P(ComparatorDBTest, DoubleComparator) {
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SetOwnedComparator(new DoubleComparator());
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for (int rnd_seed = 301; rnd_seed < 316; rnd_seed++) {
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Options* opt = GetOptions();
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opt->comparator = kTestComparator;
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DestroyAndReopen();
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Random rnd(rnd_seed);
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std::vector<std::string> source_strings;
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// Randomly generate source keys
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for (int i = 0; i < 100; i++) {
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uint32_t r = rnd.Next();
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uint32_t divide_order = rnd.Uniform(8);
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double to_divide = 1.0;
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for (uint32_t j = 0; j < divide_order; j++) {
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to_divide *= 10.0;
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}
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source_strings.push_back(ToString(r / to_divide));
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}
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DoRandomIteraratorTest(GetDB(), source_strings, &rnd, 200, 1000, 66);
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}
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}
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TEST_P(ComparatorDBTest, HashComparator) {
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SetOwnedComparator(new HashComparator());
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for (int rnd_seed = 301; rnd_seed < 316; rnd_seed++) {
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Options* opt = GetOptions();
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opt->comparator = kTestComparator;
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DestroyAndReopen();
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Random rnd(rnd_seed);
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std::vector<std::string> source_strings;
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// Randomly generate source keys
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for (int i = 0; i < 100; i++) {
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source_strings.push_back(test::RandomKey(&rnd, 8));
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}
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DoRandomIteraratorTest(GetDB(), source_strings, &rnd, 200, 1000, 66);
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}
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}
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TEST_P(ComparatorDBTest, TwoStrComparator) {
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SetOwnedComparator(new TwoStrComparator());
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for (int rnd_seed = 301; rnd_seed < 316; rnd_seed++) {
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Options* opt = GetOptions();
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opt->comparator = kTestComparator;
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DestroyAndReopen();
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Random rnd(rnd_seed);
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std::vector<std::string> source_strings;
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// Randomly generate source keys
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for (int i = 0; i < 100; i++) {
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std::string str;
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uint32_t size1 = rnd.Uniform(8);
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uint32_t size2 = rnd.Uniform(8);
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str.append(1, static_cast<char>(size1));
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str.append(1, static_cast<char>(size2));
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str.append(test::RandomKey(&rnd, size1));
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str.append(test::RandomKey(&rnd, size2));
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source_strings.push_back(str);
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}
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DoRandomIteraratorTest(GetDB(), source_strings, &rnd, 200, 1000, 66);
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}
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}
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TEST_P(ComparatorDBTest, IsSameLengthImmediateSuccessor) {
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{
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// different length
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Slice s("abcxy");
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Slice t("abcxyz");
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ASSERT_FALSE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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Slice s("abcxyz");
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Slice t("abcxy");
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ASSERT_FALSE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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// not last byte different
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Slice s("abc1xyz");
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Slice t("abc2xyz");
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ASSERT_FALSE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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// same string
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Slice s("abcxyz");
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Slice t("abcxyz");
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ASSERT_FALSE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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Slice s("abcxy");
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Slice t("abcxz");
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ASSERT_TRUE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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Slice s("abcxz");
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Slice t("abcxy");
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ASSERT_FALSE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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const char s_array[] = "\x50\x8a\xac";
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const char t_array[] = "\x50\x8a\xad";
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Slice s(s_array);
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Slice t(t_array);
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ASSERT_TRUE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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const char s_array[] = "\x50\x8a\xff";
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const char t_array[] = "\x50\x8b\x00";
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Slice s(s_array, 3);
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Slice t(t_array, 3);
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ASSERT_TRUE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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const char s_array[] = "\x50\x8a\xff\xff";
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const char t_array[] = "\x50\x8b\x00\x00";
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Slice s(s_array, 4);
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Slice t(t_array, 4);
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ASSERT_TRUE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
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}
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{
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const char s_array[] = "\x50\x8a\xff\xff";
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const char t_array[] = "\x50\x8b\x00\x01";
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Slice s(s_array, 4);
|
|
Slice t(t_array, 4);
|
|
ASSERT_FALSE(BytewiseComparator()->IsSameLengthImmediateSuccessor(s, t));
|
|
}
|
|
}
|
|
|
|
TEST_P(ComparatorDBTest, FindShortestSeparator) {
|
|
std::string s1 = "abc1xyz";
|
|
std::string s2 = "abc3xy";
|
|
|
|
BytewiseComparator()->FindShortestSeparator(&s1, s2);
|
|
ASSERT_EQ("abc2", s1);
|
|
|
|
s1 = "abc5xyztt";
|
|
|
|
ReverseBytewiseComparator()->FindShortestSeparator(&s1, s2);
|
|
ASSERT_EQ("abc5", s1);
|
|
|
|
s1 = "abc3";
|
|
s2 = "abc2xy";
|
|
ReverseBytewiseComparator()->FindShortestSeparator(&s1, s2);
|
|
ASSERT_EQ("abc3", s1);
|
|
|
|
s1 = "abc3xyz";
|
|
s2 = "abc2xy";
|
|
ReverseBytewiseComparator()->FindShortestSeparator(&s1, s2);
|
|
ASSERT_EQ("abc3", s1);
|
|
|
|
s1 = "abc3xyz";
|
|
s2 = "abc2";
|
|
ReverseBytewiseComparator()->FindShortestSeparator(&s1, s2);
|
|
ASSERT_EQ("abc3", s1);
|
|
|
|
std::string old_s1 = s1 = "abc2xy";
|
|
s2 = "abc2";
|
|
ReverseBytewiseComparator()->FindShortestSeparator(&s1, s2);
|
|
ASSERT_TRUE(old_s1 >= s1);
|
|
ASSERT_TRUE(s1 > s2);
|
|
}
|
|
|
|
TEST_P(ComparatorDBTest, SeparatorSuccessorRandomizeTest) {
|
|
// Char list for boundary cases.
|
|
std::array<unsigned char, 6> char_list{{0, 1, 2, 253, 254, 255}};
|
|
Random rnd(301);
|
|
|
|
for (int attempts = 0; attempts < 1000; attempts++) {
|
|
uint32_t size1 = rnd.Skewed(4);
|
|
uint32_t size2;
|
|
|
|
if (rnd.OneIn(2)) {
|
|
// size2 to be random size
|
|
size2 = rnd.Skewed(4);
|
|
} else {
|
|
// size1 is within [-2, +2] of size1
|
|
int diff = static_cast<int>(rnd.Uniform(5)) - 2;
|
|
int tmp_size2 = static_cast<int>(size1) + diff;
|
|
if (tmp_size2 < 0) {
|
|
tmp_size2 = 0;
|
|
}
|
|
size2 = static_cast<uint32_t>(tmp_size2);
|
|
}
|
|
|
|
std::string s1;
|
|
std::string s2;
|
|
for (uint32_t i = 0; i < size1; i++) {
|
|
if (rnd.OneIn(2)) {
|
|
// Use random byte
|
|
s1 += static_cast<char>(rnd.Uniform(256));
|
|
} else {
|
|
// Use one byte in char_list
|
|
char c = static_cast<char>(char_list[rnd.Uniform(sizeof(char_list))]);
|
|
s1 += c;
|
|
}
|
|
}
|
|
|
|
// First set s2 to be the same as s1, and then modify s2.
|
|
s2 = s1;
|
|
s2.resize(size2);
|
|
// We start from the back of the string
|
|
if (size2 > 0) {
|
|
uint32_t pos = size2 - 1;
|
|
do {
|
|
if (pos >= size1 || rnd.OneIn(4)) {
|
|
// For 1/4 chance, use random byte
|
|
s2[pos] = static_cast<char>(rnd.Uniform(256));
|
|
} else if (rnd.OneIn(4)) {
|
|
// In 1/4 chance, stop here.
|
|
break;
|
|
} else {
|
|
// Create a char within [-2, +2] of the matching char of s1.
|
|
int diff = static_cast<int>(rnd.Uniform(5)) - 2;
|
|
// char may be signed or unsigned based on platform.
|
|
int s1_char = static_cast<int>(static_cast<unsigned char>(s1[pos]));
|
|
int s2_char = s1_char + diff;
|
|
if (s2_char < 0) {
|
|
s2_char = 0;
|
|
}
|
|
if (s2_char > 255) {
|
|
s2_char = 255;
|
|
}
|
|
s2[pos] = static_cast<char>(s2_char);
|
|
}
|
|
} while (pos-- != 0);
|
|
}
|
|
|
|
// Test separators
|
|
for (int rev = 0; rev < 2; rev++) {
|
|
if (rev == 1) {
|
|
// switch s1 and s2
|
|
std::string t = s1;
|
|
s1 = s2;
|
|
s2 = t;
|
|
}
|
|
std::string separator = s1;
|
|
BytewiseComparator()->FindShortestSeparator(&separator, s2);
|
|
std::string rev_separator = s1;
|
|
ReverseBytewiseComparator()->FindShortestSeparator(&rev_separator, s2);
|
|
|
|
if (s1 == s2) {
|
|
ASSERT_EQ(s1, separator);
|
|
ASSERT_EQ(s2, rev_separator);
|
|
} else if (s1 < s2) {
|
|
ASSERT_TRUE(s1 <= separator);
|
|
ASSERT_TRUE(s2 > separator);
|
|
ASSERT_LE(separator.size(), std::max(s1.size(), s2.size()));
|
|
ASSERT_EQ(s1, rev_separator);
|
|
} else {
|
|
ASSERT_TRUE(s1 >= rev_separator);
|
|
ASSERT_TRUE(s2 < rev_separator);
|
|
ASSERT_LE(rev_separator.size(), std::max(s1.size(), s2.size()));
|
|
ASSERT_EQ(s1, separator);
|
|
}
|
|
}
|
|
|
|
// Test successors
|
|
std::string succ = s1;
|
|
BytewiseComparator()->FindShortSuccessor(&succ);
|
|
ASSERT_TRUE(succ >= s1);
|
|
|
|
succ = s1;
|
|
ReverseBytewiseComparator()->FindShortSuccessor(&succ);
|
|
ASSERT_TRUE(succ <= s1);
|
|
}
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
int main(int argc, char** argv) {
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|
|
|