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file_indexer_test.cc
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <string>
#include "db/file_indexer.h"
#include "db/dbformat.h"
#include "db/version_edit.h"
#include "port/stack_trace.h"
#include "rocksdb/comparator.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
class IntComparator : public Comparator {
public:
int Compare(const Slice& a, const Slice& b) const override {
assert(a.size() == 8);
assert(b.size() == 8);
int64_t diff = *reinterpret_cast<const int64_t*>(a.data()) -
*reinterpret_cast<const int64_t*>(b.data());
if (diff < 0) {
return -1;
} else if (diff == 0) {
return 0;
} else {
return 1;
}
}
const char* Name() const override { return "IntComparator"; }
void FindShortestSeparator(std::string* start,
const Slice& limit) const override {}
void FindShortSuccessor(std::string* key) const override {}
};
class FileIndexerTest : public testing::Test {
public:
FileIndexerTest()
: kNumLevels(4), files(new std::vector<FileMetaData*>[kNumLevels]) {}
~FileIndexerTest() {
ClearFiles();
delete[] files;
}
void AddFile(int level, int64_t smallest, int64_t largest) {
auto* f = new FileMetaData();
f->smallest = IntKey(smallest);
f->largest = IntKey(largest);
files[level].push_back(f);
}
InternalKey IntKey(int64_t v) {
return InternalKey(Slice(reinterpret_cast<char*>(&v), 8), 0, kTypeValue);
}
void ClearFiles() {
for (uint32_t i = 0; i < kNumLevels; ++i) {
for (auto* f : files[i]) {
delete f;
}
files[i].clear();
}
}
void GetNextLevelIndex(const uint32_t level, const uint32_t file_index,
const int cmp_smallest, const int cmp_largest, int32_t* left_index,
int32_t* right_index) {
*left_index = 100;
*right_index = 100;
indexer->GetNextLevelIndex(level, file_index, cmp_smallest, cmp_largest,
left_index, right_index);
}
int32_t left = 100;
int32_t right = 100;
const uint32_t kNumLevels;
IntComparator ucmp;
FileIndexer* indexer;
std::vector<FileMetaData*>* files;
};
// Case 0: Empty
TEST_F(FileIndexerTest, Empty) {
Arena arena;
indexer = new FileIndexer(&ucmp);
indexer->UpdateIndex(&arena, 0, files);
delete indexer;
}
// Case 1: no overlap, files are on the left of next level files
TEST_F(FileIndexerTest, no_overlap_left) {
Arena arena;
indexer = new FileIndexer(&ucmp);
// level 1
AddFile(1, 100, 200);
AddFile(1, 300, 400);
AddFile(1, 500, 600);
// level 2
AddFile(2, 1500, 1600);
AddFile(2, 1601, 1699);
AddFile(2, 1700, 1800);
// level 3
AddFile(3, 2500, 2600);
AddFile(3, 2601, 2699);
AddFile(3, 2700, 2800);
indexer->UpdateIndex(&arena, kNumLevels, files);
for (uint32_t level = 1; level < 3; ++level) {
for (uint32_t f = 0; f < 3; ++f) {
GetNextLevelIndex(level, f, -1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(level, f, 0, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(level, f, 1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(level, f, 1, 0, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(level, f, 1, 1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(2, right);
}
}
delete indexer;
ClearFiles();
}
// Case 2: no overlap, files are on the right of next level files
TEST_F(FileIndexerTest, no_overlap_right) {
Arena arena;
indexer = new FileIndexer(&ucmp);
// level 1
AddFile(1, 2100, 2200);
AddFile(1, 2300, 2400);
AddFile(1, 2500, 2600);
// level 2
AddFile(2, 1500, 1600);
AddFile(2, 1501, 1699);
AddFile(2, 1700, 1800);
// level 3
AddFile(3, 500, 600);
AddFile(3, 501, 699);
AddFile(3, 700, 800);
indexer->UpdateIndex(&arena, kNumLevels, files);
for (uint32_t level = 1; level < 3; ++level) {
for (uint32_t f = 0; f < 3; ++f) {
GetNextLevelIndex(level, f, -1, -1, &left, &right);
ASSERT_EQ(f == 0 ? 0 : 3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(level, f, 0, -1, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(level, f, 1, -1, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(level, f, 1, -1, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(level, f, 1, 0, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(level, f, 1, 1, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
}
}
delete indexer;
}
// Case 3: empty L2
TEST_F(FileIndexerTest, empty_L2) {
Arena arena;
indexer = new FileIndexer(&ucmp);
for (uint32_t i = 1; i < kNumLevels; ++i) {
ASSERT_EQ(0U, indexer->LevelIndexSize(i));
}
// level 1
AddFile(1, 2100, 2200);
AddFile(1, 2300, 2400);
AddFile(1, 2500, 2600);
// level 3
AddFile(3, 500, 600);
AddFile(3, 501, 699);
AddFile(3, 700, 800);
indexer->UpdateIndex(&arena, kNumLevels, files);
for (uint32_t f = 0; f < 3; ++f) {
GetNextLevelIndex(1, f, -1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(1, f, 0, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(1, f, 1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(1, f, 1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(1, f, 1, 0, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
GetNextLevelIndex(1, f, 1, 1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(-1, right);
}
delete indexer;
ClearFiles();
}
// Case 4: mixed
TEST_F(FileIndexerTest, mixed) {
Arena arena;
indexer = new FileIndexer(&ucmp);
// level 1
AddFile(1, 100, 200);
AddFile(1, 250, 400);
AddFile(1, 450, 500);
// level 2
AddFile(2, 100, 150); // 0
AddFile(2, 200, 250); // 1
AddFile(2, 251, 300); // 2
AddFile(2, 301, 350); // 3
AddFile(2, 500, 600); // 4
// level 3
AddFile(3, 0, 50);
AddFile(3, 100, 200);
AddFile(3, 201, 250);
indexer->UpdateIndex(&arena, kNumLevels, files);
// level 1, 0
GetNextLevelIndex(1, 0, -1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(0, right);
GetNextLevelIndex(1, 0, 0, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(0, right);
GetNextLevelIndex(1, 0, 1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(1, 0, 1, 0, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(1, 0, 1, 1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(4, right);
// level 1, 1
GetNextLevelIndex(1, 1, -1, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(1, 1, 0, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(1, 1, 1, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(3, right);
GetNextLevelIndex(1, 1, 1, 0, &left, &right);
ASSERT_EQ(4, left);
ASSERT_EQ(3, right);
GetNextLevelIndex(1, 1, 1, 1, &left, &right);
ASSERT_EQ(4, left);
ASSERT_EQ(4, right);
// level 1, 2
GetNextLevelIndex(1, 2, -1, -1, &left, &right);
ASSERT_EQ(4, left);
ASSERT_EQ(3, right);
GetNextLevelIndex(1, 2, 0, -1, &left, &right);
ASSERT_EQ(4, left);
ASSERT_EQ(3, right);
GetNextLevelIndex(1, 2, 1, -1, &left, &right);
ASSERT_EQ(4, left);
ASSERT_EQ(4, right);
GetNextLevelIndex(1, 2, 1, 0, &left, &right);
ASSERT_EQ(4, left);
ASSERT_EQ(4, right);
GetNextLevelIndex(1, 2, 1, 1, &left, &right);
ASSERT_EQ(4, left);
ASSERT_EQ(4, right);
// level 2, 0
GetNextLevelIndex(2, 0, -1, -1, &left, &right);
ASSERT_EQ(0, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(2, 0, 0, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(2, 0, 1, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(2, 0, 1, 0, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(2, 0, 1, 1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(2, right);
// level 2, 1
GetNextLevelIndex(2, 1, -1, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(2, 1, 0, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(1, right);
GetNextLevelIndex(2, 1, 1, -1, &left, &right);
ASSERT_EQ(1, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(2, 1, 1, 0, &left, &right);
ASSERT_EQ(2, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(2, 1, 1, 1, &left, &right);
ASSERT_EQ(2, left);
ASSERT_EQ(2, right);
// level 2, [2 - 4], no overlap
for (uint32_t f = 2; f <= 4; ++f) {
GetNextLevelIndex(2, f, -1, -1, &left, &right);
ASSERT_EQ(f == 2 ? 2 : 3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(2, f, 0, -1, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(2, f, 1, -1, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(2, f, 1, 0, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
GetNextLevelIndex(2, f, 1, 1, &left, &right);
ASSERT_EQ(3, left);
ASSERT_EQ(2, right);
}
delete indexer;
ClearFiles();
}
} // namespace rocksdb
int main(int argc, char** argv) {
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}