aboutsummaryrefslogtreecommitdiff
path: root/src/leveldb/table/table_test.cc
diff options
context:
space:
mode:
Diffstat (limited to 'src/leveldb/table/table_test.cc')
-rw-r--r--src/leveldb/table/table_test.cc838
1 files changed, 838 insertions, 0 deletions
diff --git a/src/leveldb/table/table_test.cc b/src/leveldb/table/table_test.cc
new file mode 100644
index 0000000000..57cea25334
--- /dev/null
+++ b/src/leveldb/table/table_test.cc
@@ -0,0 +1,838 @@
+// 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 "leveldb/table.h"
+
+#include <map>
+#include <string>
+#include "db/dbformat.h"
+#include "db/memtable.h"
+#include "db/write_batch_internal.h"
+#include "leveldb/db.h"
+#include "leveldb/env.h"
+#include "leveldb/iterator.h"
+#include "leveldb/table_builder.h"
+#include "table/block.h"
+#include "table/block_builder.h"
+#include "table/format.h"
+#include "util/random.h"
+#include "util/testharness.h"
+#include "util/testutil.h"
+
+namespace leveldb {
+
+// Return reverse of "key".
+// Used to test non-lexicographic comparators.
+static std::string Reverse(const Slice& key) {
+ std::string str(key.ToString());
+ std::string rev("");
+ for (std::string::reverse_iterator rit = str.rbegin();
+ rit != str.rend(); ++rit) {
+ rev.push_back(*rit);
+ }
+ return rev;
+}
+
+namespace {
+class ReverseKeyComparator : public Comparator {
+ public:
+ virtual const char* Name() const {
+ return "leveldb.ReverseBytewiseComparator";
+ }
+
+ virtual int Compare(const Slice& a, const Slice& b) const {
+ return BytewiseComparator()->Compare(Reverse(a), Reverse(b));
+ }
+
+ virtual void FindShortestSeparator(
+ std::string* start,
+ const Slice& limit) const {
+ std::string s = Reverse(*start);
+ std::string l = Reverse(limit);
+ BytewiseComparator()->FindShortestSeparator(&s, l);
+ *start = Reverse(s);
+ }
+
+ virtual void FindShortSuccessor(std::string* key) const {
+ std::string s = Reverse(*key);
+ BytewiseComparator()->FindShortSuccessor(&s);
+ *key = Reverse(s);
+ }
+};
+} // namespace
+static ReverseKeyComparator reverse_key_comparator;
+
+static void Increment(const Comparator* cmp, std::string* key) {
+ if (cmp == BytewiseComparator()) {
+ key->push_back('\0');
+ } else {
+ assert(cmp == &reverse_key_comparator);
+ std::string rev = Reverse(*key);
+ rev.push_back('\0');
+ *key = Reverse(rev);
+ }
+}
+
+// An STL comparator that uses a Comparator
+namespace {
+struct STLLessThan {
+ const Comparator* cmp;
+
+ STLLessThan() : cmp(BytewiseComparator()) { }
+ STLLessThan(const Comparator* c) : cmp(c) { }
+ bool operator()(const std::string& a, const std::string& b) const {
+ return cmp->Compare(Slice(a), Slice(b)) < 0;
+ }
+};
+} // namespace
+
+class StringSink: public WritableFile {
+ public:
+ ~StringSink() { }
+
+ const std::string& contents() const { return contents_; }
+
+ virtual Status Close() { return Status::OK(); }
+ virtual Status Flush() { return Status::OK(); }
+ virtual Status Sync() { return Status::OK(); }
+
+ virtual Status Append(const Slice& data) {
+ contents_.append(data.data(), data.size());
+ return Status::OK();
+ }
+
+ private:
+ std::string contents_;
+};
+
+
+class StringSource: public RandomAccessFile {
+ public:
+ StringSource(const Slice& contents)
+ : contents_(contents.data(), contents.size()) {
+ }
+
+ virtual ~StringSource() { }
+
+ uint64_t Size() const { return contents_.size(); }
+
+ virtual Status Read(uint64_t offset, size_t n, Slice* result,
+ char* scratch) const {
+ if (offset > contents_.size()) {
+ return Status::InvalidArgument("invalid Read offset");
+ }
+ if (offset + n > contents_.size()) {
+ n = contents_.size() - offset;
+ }
+ memcpy(scratch, &contents_[offset], n);
+ *result = Slice(scratch, n);
+ return Status::OK();
+ }
+
+ private:
+ std::string contents_;
+};
+
+typedef std::map<std::string, std::string, STLLessThan> KVMap;
+
+// Helper class for tests to unify the interface between
+// BlockBuilder/TableBuilder and Block/Table.
+class Constructor {
+ public:
+ explicit Constructor(const Comparator* cmp) : data_(STLLessThan(cmp)) { }
+ virtual ~Constructor() { }
+
+ void Add(const std::string& key, const Slice& value) {
+ data_[key] = value.ToString();
+ }
+
+ // Finish constructing the data structure with all the keys that have
+ // been added so far. Returns the keys in sorted order in "*keys"
+ // and stores the key/value pairs in "*kvmap"
+ void Finish(const Options& options,
+ std::vector<std::string>* keys,
+ KVMap* kvmap) {
+ *kvmap = data_;
+ keys->clear();
+ for (KVMap::const_iterator it = data_.begin();
+ it != data_.end();
+ ++it) {
+ keys->push_back(it->first);
+ }
+ data_.clear();
+ Status s = FinishImpl(options, *kvmap);
+ ASSERT_TRUE(s.ok()) << s.ToString();
+ }
+
+ // Construct the data structure from the data in "data"
+ virtual Status FinishImpl(const Options& options, const KVMap& data) = 0;
+
+ virtual Iterator* NewIterator() const = 0;
+
+ virtual const KVMap& data() { return data_; }
+
+ virtual DB* db() const { return NULL; } // Overridden in DBConstructor
+
+ private:
+ KVMap data_;
+};
+
+class BlockConstructor: public Constructor {
+ public:
+ explicit BlockConstructor(const Comparator* cmp)
+ : Constructor(cmp),
+ comparator_(cmp),
+ block_(NULL) { }
+ ~BlockConstructor() {
+ delete block_;
+ }
+ virtual Status FinishImpl(const Options& options, const KVMap& data) {
+ delete block_;
+ block_ = NULL;
+ BlockBuilder builder(&options);
+
+ for (KVMap::const_iterator it = data.begin();
+ it != data.end();
+ ++it) {
+ builder.Add(it->first, it->second);
+ }
+ // Open the block
+ data_ = builder.Finish().ToString();
+ BlockContents contents;
+ contents.data = data_;
+ contents.cachable = false;
+ contents.heap_allocated = false;
+ block_ = new Block(contents);
+ return Status::OK();
+ }
+ virtual Iterator* NewIterator() const {
+ return block_->NewIterator(comparator_);
+ }
+
+ private:
+ const Comparator* comparator_;
+ std::string data_;
+ Block* block_;
+
+ BlockConstructor();
+};
+
+class TableConstructor: public Constructor {
+ public:
+ TableConstructor(const Comparator* cmp)
+ : Constructor(cmp),
+ source_(NULL), table_(NULL) {
+ }
+ ~TableConstructor() {
+ Reset();
+ }
+ virtual Status FinishImpl(const Options& options, const KVMap& data) {
+ Reset();
+ StringSink sink;
+ TableBuilder builder(options, &sink);
+
+ for (KVMap::const_iterator it = data.begin();
+ it != data.end();
+ ++it) {
+ builder.Add(it->first, it->second);
+ ASSERT_TRUE(builder.status().ok());
+ }
+ Status s = builder.Finish();
+ ASSERT_TRUE(s.ok()) << s.ToString();
+
+ ASSERT_EQ(sink.contents().size(), builder.FileSize());
+
+ // Open the table
+ source_ = new StringSource(sink.contents());
+ Options table_options;
+ table_options.comparator = options.comparator;
+ return Table::Open(table_options, source_, sink.contents().size(), &table_);
+ }
+
+ virtual Iterator* NewIterator() const {
+ return table_->NewIterator(ReadOptions());
+ }
+
+ uint64_t ApproximateOffsetOf(const Slice& key) const {
+ return table_->ApproximateOffsetOf(key);
+ }
+
+ private:
+ void Reset() {
+ delete table_;
+ delete source_;
+ table_ = NULL;
+ source_ = NULL;
+ }
+
+ StringSource* source_;
+ Table* table_;
+
+ TableConstructor();
+};
+
+// A helper class that converts internal format keys into user keys
+class KeyConvertingIterator: public Iterator {
+ public:
+ explicit KeyConvertingIterator(Iterator* iter) : iter_(iter) { }
+ virtual ~KeyConvertingIterator() { delete iter_; }
+ virtual bool Valid() const { return iter_->Valid(); }
+ virtual void Seek(const Slice& target) {
+ ParsedInternalKey ikey(target, kMaxSequenceNumber, kTypeValue);
+ std::string encoded;
+ AppendInternalKey(&encoded, ikey);
+ iter_->Seek(encoded);
+ }
+ virtual void SeekToFirst() { iter_->SeekToFirst(); }
+ virtual void SeekToLast() { iter_->SeekToLast(); }
+ virtual void Next() { iter_->Next(); }
+ virtual void Prev() { iter_->Prev(); }
+
+ virtual Slice key() const {
+ assert(Valid());
+ ParsedInternalKey key;
+ if (!ParseInternalKey(iter_->key(), &key)) {
+ status_ = Status::Corruption("malformed internal key");
+ return Slice("corrupted key");
+ }
+ return key.user_key;
+ }
+
+ virtual Slice value() const { return iter_->value(); }
+ virtual Status status() const {
+ return status_.ok() ? iter_->status() : status_;
+ }
+
+ private:
+ mutable Status status_;
+ Iterator* iter_;
+
+ // No copying allowed
+ KeyConvertingIterator(const KeyConvertingIterator&);
+ void operator=(const KeyConvertingIterator&);
+};
+
+class MemTableConstructor: public Constructor {
+ public:
+ explicit MemTableConstructor(const Comparator* cmp)
+ : Constructor(cmp),
+ internal_comparator_(cmp) {
+ memtable_ = new MemTable(internal_comparator_);
+ memtable_->Ref();
+ }
+ ~MemTableConstructor() {
+ memtable_->Unref();
+ }
+ virtual Status FinishImpl(const Options& options, const KVMap& data) {
+ memtable_->Unref();
+ memtable_ = new MemTable(internal_comparator_);
+ memtable_->Ref();
+ int seq = 1;
+ for (KVMap::const_iterator it = data.begin();
+ it != data.end();
+ ++it) {
+ memtable_->Add(seq, kTypeValue, it->first, it->second);
+ seq++;
+ }
+ return Status::OK();
+ }
+ virtual Iterator* NewIterator() const {
+ return new KeyConvertingIterator(memtable_->NewIterator());
+ }
+
+ private:
+ InternalKeyComparator internal_comparator_;
+ MemTable* memtable_;
+};
+
+class DBConstructor: public Constructor {
+ public:
+ explicit DBConstructor(const Comparator* cmp)
+ : Constructor(cmp),
+ comparator_(cmp) {
+ db_ = NULL;
+ NewDB();
+ }
+ ~DBConstructor() {
+ delete db_;
+ }
+ virtual Status FinishImpl(const Options& options, const KVMap& data) {
+ delete db_;
+ db_ = NULL;
+ NewDB();
+ for (KVMap::const_iterator it = data.begin();
+ it != data.end();
+ ++it) {
+ WriteBatch batch;
+ batch.Put(it->first, it->second);
+ ASSERT_TRUE(db_->Write(WriteOptions(), &batch).ok());
+ }
+ return Status::OK();
+ }
+ virtual Iterator* NewIterator() const {
+ return db_->NewIterator(ReadOptions());
+ }
+
+ virtual DB* db() const { return db_; }
+
+ private:
+ void NewDB() {
+ std::string name = test::TmpDir() + "/table_testdb";
+
+ Options options;
+ options.comparator = comparator_;
+ Status status = DestroyDB(name, options);
+ ASSERT_TRUE(status.ok()) << status.ToString();
+
+ options.create_if_missing = true;
+ options.error_if_exists = true;
+ options.write_buffer_size = 10000; // Something small to force merging
+ status = DB::Open(options, name, &db_);
+ ASSERT_TRUE(status.ok()) << status.ToString();
+ }
+
+ const Comparator* comparator_;
+ DB* db_;
+};
+
+enum TestType {
+ TABLE_TEST,
+ BLOCK_TEST,
+ MEMTABLE_TEST,
+ DB_TEST
+};
+
+struct TestArgs {
+ TestType type;
+ bool reverse_compare;
+ int restart_interval;
+};
+
+static const TestArgs kTestArgList[] = {
+ { TABLE_TEST, false, 16 },
+ { TABLE_TEST, false, 1 },
+ { TABLE_TEST, false, 1024 },
+ { TABLE_TEST, true, 16 },
+ { TABLE_TEST, true, 1 },
+ { TABLE_TEST, true, 1024 },
+
+ { BLOCK_TEST, false, 16 },
+ { BLOCK_TEST, false, 1 },
+ { BLOCK_TEST, false, 1024 },
+ { BLOCK_TEST, true, 16 },
+ { BLOCK_TEST, true, 1 },
+ { BLOCK_TEST, true, 1024 },
+
+ // Restart interval does not matter for memtables
+ { MEMTABLE_TEST, false, 16 },
+ { MEMTABLE_TEST, true, 16 },
+
+ // Do not bother with restart interval variations for DB
+ { DB_TEST, false, 16 },
+ { DB_TEST, true, 16 },
+};
+static const int kNumTestArgs = sizeof(kTestArgList) / sizeof(kTestArgList[0]);
+
+class Harness {
+ public:
+ Harness() : constructor_(NULL) { }
+
+ void Init(const TestArgs& args) {
+ delete constructor_;
+ constructor_ = NULL;
+ options_ = Options();
+
+ options_.block_restart_interval = args.restart_interval;
+ // Use shorter block size for tests to exercise block boundary
+ // conditions more.
+ options_.block_size = 256;
+ if (args.reverse_compare) {
+ options_.comparator = &reverse_key_comparator;
+ }
+ switch (args.type) {
+ case TABLE_TEST:
+ constructor_ = new TableConstructor(options_.comparator);
+ break;
+ case BLOCK_TEST:
+ constructor_ = new BlockConstructor(options_.comparator);
+ break;
+ case MEMTABLE_TEST:
+ constructor_ = new MemTableConstructor(options_.comparator);
+ break;
+ case DB_TEST:
+ constructor_ = new DBConstructor(options_.comparator);
+ break;
+ }
+ }
+
+ ~Harness() {
+ delete constructor_;
+ }
+
+ void Add(const std::string& key, const std::string& value) {
+ constructor_->Add(key, value);
+ }
+
+ void Test(Random* rnd) {
+ std::vector<std::string> keys;
+ KVMap data;
+ constructor_->Finish(options_, &keys, &data);
+
+ TestForwardScan(keys, data);
+ TestBackwardScan(keys, data);
+ TestRandomAccess(rnd, keys, data);
+ }
+
+ void TestForwardScan(const std::vector<std::string>& keys,
+ const KVMap& data) {
+ Iterator* iter = constructor_->NewIterator();
+ ASSERT_TRUE(!iter->Valid());
+ iter->SeekToFirst();
+ for (KVMap::const_iterator model_iter = data.begin();
+ model_iter != data.end();
+ ++model_iter) {
+ ASSERT_EQ(ToString(data, model_iter), ToString(iter));
+ iter->Next();
+ }
+ ASSERT_TRUE(!iter->Valid());
+ delete iter;
+ }
+
+ void TestBackwardScan(const std::vector<std::string>& keys,
+ const KVMap& data) {
+ Iterator* iter = constructor_->NewIterator();
+ ASSERT_TRUE(!iter->Valid());
+ iter->SeekToLast();
+ for (KVMap::const_reverse_iterator model_iter = data.rbegin();
+ model_iter != data.rend();
+ ++model_iter) {
+ ASSERT_EQ(ToString(data, model_iter), ToString(iter));
+ iter->Prev();
+ }
+ ASSERT_TRUE(!iter->Valid());
+ delete iter;
+ }
+
+ void TestRandomAccess(Random* rnd,
+ const std::vector<std::string>& keys,
+ const KVMap& data) {
+ static const bool kVerbose = false;
+ Iterator* iter = constructor_->NewIterator();
+ ASSERT_TRUE(!iter->Valid());
+ KVMap::const_iterator model_iter = data.begin();
+ if (kVerbose) fprintf(stderr, "---\n");
+ for (int i = 0; i < 200; i++) {
+ const int toss = rnd->Uniform(5);
+ switch (toss) {
+ case 0: {
+ if (iter->Valid()) {
+ if (kVerbose) fprintf(stderr, "Next\n");
+ iter->Next();
+ ++model_iter;
+ ASSERT_EQ(ToString(data, model_iter), ToString(iter));
+ }
+ break;
+ }
+
+ case 1: {
+ if (kVerbose) fprintf(stderr, "SeekToFirst\n");
+ iter->SeekToFirst();
+ model_iter = data.begin();
+ ASSERT_EQ(ToString(data, model_iter), ToString(iter));
+ break;
+ }
+
+ case 2: {
+ std::string key = PickRandomKey(rnd, keys);
+ model_iter = data.lower_bound(key);
+ if (kVerbose) fprintf(stderr, "Seek '%s'\n",
+ EscapeString(key).c_str());
+ iter->Seek(Slice(key));
+ ASSERT_EQ(ToString(data, model_iter), ToString(iter));
+ break;
+ }
+
+ case 3: {
+ if (iter->Valid()) {
+ if (kVerbose) fprintf(stderr, "Prev\n");
+ iter->Prev();
+ if (model_iter == data.begin()) {
+ model_iter = data.end(); // Wrap around to invalid value
+ } else {
+ --model_iter;
+ }
+ ASSERT_EQ(ToString(data, model_iter), ToString(iter));
+ }
+ break;
+ }
+
+ case 4: {
+ if (kVerbose) fprintf(stderr, "SeekToLast\n");
+ iter->SeekToLast();
+ if (keys.empty()) {
+ model_iter = data.end();
+ } else {
+ std::string last = data.rbegin()->first;
+ model_iter = data.lower_bound(last);
+ }
+ ASSERT_EQ(ToString(data, model_iter), ToString(iter));
+ break;
+ }
+ }
+ }
+ delete iter;
+ }
+
+ std::string ToString(const KVMap& data, const KVMap::const_iterator& it) {
+ if (it == data.end()) {
+ return "END";
+ } else {
+ return "'" + it->first + "->" + it->second + "'";
+ }
+ }
+
+ std::string ToString(const KVMap& data,
+ const KVMap::const_reverse_iterator& it) {
+ if (it == data.rend()) {
+ return "END";
+ } else {
+ return "'" + it->first + "->" + it->second + "'";
+ }
+ }
+
+ std::string ToString(const Iterator* it) {
+ if (!it->Valid()) {
+ return "END";
+ } else {
+ return "'" + it->key().ToString() + "->" + it->value().ToString() + "'";
+ }
+ }
+
+ std::string PickRandomKey(Random* rnd, const std::vector<std::string>& keys) {
+ if (keys.empty()) {
+ return "foo";
+ } else {
+ const int index = rnd->Uniform(keys.size());
+ std::string result = keys[index];
+ switch (rnd->Uniform(3)) {
+ case 0:
+ // Return an existing key
+ break;
+ case 1: {
+ // Attempt to return something smaller than an existing key
+ if (result.size() > 0 && result[result.size()-1] > '\0') {
+ result[result.size()-1]--;
+ }
+ break;
+ }
+ case 2: {
+ // Return something larger than an existing key
+ Increment(options_.comparator, &result);
+ break;
+ }
+ }
+ return result;
+ }
+ }
+
+ // Returns NULL if not running against a DB
+ DB* db() const { return constructor_->db(); }
+
+ private:
+ Options options_;
+ Constructor* constructor_;
+};
+
+// Test the empty key
+TEST(Harness, SimpleEmptyKey) {
+ for (int i = 0; i < kNumTestArgs; i++) {
+ Init(kTestArgList[i]);
+ Random rnd(test::RandomSeed() + 1);
+ Add("", "v");
+ Test(&rnd);
+ }
+}
+
+TEST(Harness, SimpleSingle) {
+ for (int i = 0; i < kNumTestArgs; i++) {
+ Init(kTestArgList[i]);
+ Random rnd(test::RandomSeed() + 2);
+ Add("abc", "v");
+ Test(&rnd);
+ }
+}
+
+TEST(Harness, SimpleMulti) {
+ for (int i = 0; i < kNumTestArgs; i++) {
+ Init(kTestArgList[i]);
+ Random rnd(test::RandomSeed() + 3);
+ Add("abc", "v");
+ Add("abcd", "v");
+ Add("ac", "v2");
+ Test(&rnd);
+ }
+}
+
+TEST(Harness, SimpleSpecialKey) {
+ for (int i = 0; i < kNumTestArgs; i++) {
+ Init(kTestArgList[i]);
+ Random rnd(test::RandomSeed() + 4);
+ Add("\xff\xff", "v3");
+ Test(&rnd);
+ }
+}
+
+TEST(Harness, Randomized) {
+ for (int i = 0; i < kNumTestArgs; i++) {
+ Init(kTestArgList[i]);
+ Random rnd(test::RandomSeed() + 5);
+ for (int num_entries = 0; num_entries < 2000;
+ num_entries += (num_entries < 50 ? 1 : 200)) {
+ if ((num_entries % 10) == 0) {
+ fprintf(stderr, "case %d of %d: num_entries = %d\n",
+ (i + 1), int(kNumTestArgs), num_entries);
+ }
+ for (int e = 0; e < num_entries; e++) {
+ std::string v;
+ Add(test::RandomKey(&rnd, rnd.Skewed(4)),
+ test::RandomString(&rnd, rnd.Skewed(5), &v).ToString());
+ }
+ Test(&rnd);
+ }
+ }
+}
+
+TEST(Harness, RandomizedLongDB) {
+ Random rnd(test::RandomSeed());
+ TestArgs args = { DB_TEST, false, 16 };
+ Init(args);
+ int num_entries = 100000;
+ for (int e = 0; e < num_entries; e++) {
+ std::string v;
+ Add(test::RandomKey(&rnd, rnd.Skewed(4)),
+ test::RandomString(&rnd, rnd.Skewed(5), &v).ToString());
+ }
+ Test(&rnd);
+
+ // We must have created enough data to force merging
+ int files = 0;
+ for (int level = 0; level < config::kNumLevels; level++) {
+ std::string value;
+ char name[100];
+ snprintf(name, sizeof(name), "leveldb.num-files-at-level%d", level);
+ ASSERT_TRUE(db()->GetProperty(name, &value));
+ files += atoi(value.c_str());
+ }
+ ASSERT_GT(files, 0);
+}
+
+class MemTableTest { };
+
+TEST(MemTableTest, Simple) {
+ InternalKeyComparator cmp(BytewiseComparator());
+ MemTable* memtable = new MemTable(cmp);
+ memtable->Ref();
+ WriteBatch batch;
+ WriteBatchInternal::SetSequence(&batch, 100);
+ batch.Put(std::string("k1"), std::string("v1"));
+ batch.Put(std::string("k2"), std::string("v2"));
+ batch.Put(std::string("k3"), std::string("v3"));
+ batch.Put(std::string("largekey"), std::string("vlarge"));
+ ASSERT_TRUE(WriteBatchInternal::InsertInto(&batch, memtable).ok());
+
+ Iterator* iter = memtable->NewIterator();
+ iter->SeekToFirst();
+ while (iter->Valid()) {
+ fprintf(stderr, "key: '%s' -> '%s'\n",
+ iter->key().ToString().c_str(),
+ iter->value().ToString().c_str());
+ iter->Next();
+ }
+
+ delete iter;
+ memtable->Unref();
+}
+
+static bool Between(uint64_t val, uint64_t low, uint64_t high) {
+ bool result = (val >= low) && (val <= high);
+ if (!result) {
+ fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
+ (unsigned long long)(val),
+ (unsigned long long)(low),
+ (unsigned long long)(high));
+ }
+ return result;
+}
+
+class TableTest { };
+
+TEST(TableTest, ApproximateOffsetOfPlain) {
+ TableConstructor c(BytewiseComparator());
+ c.Add("k01", "hello");
+ c.Add("k02", "hello2");
+ c.Add("k03", std::string(10000, 'x'));
+ c.Add("k04", std::string(200000, 'x'));
+ c.Add("k05", std::string(300000, 'x'));
+ c.Add("k06", "hello3");
+ c.Add("k07", std::string(100000, 'x'));
+ std::vector<std::string> keys;
+ KVMap kvmap;
+ Options options;
+ options.block_size = 1024;
+ options.compression = kNoCompression;
+ c.Finish(options, &keys, &kvmap);
+
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01a"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), 10000, 11000));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04a"), 210000, 211000));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k05"), 210000, 211000));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k06"), 510000, 511000));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k07"), 510000, 511000));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 610000, 612000));
+
+}
+
+static bool SnappyCompressionSupported() {
+ std::string out;
+ Slice in = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+ return port::Snappy_Compress(in.data(), in.size(), &out);
+}
+
+TEST(TableTest, ApproximateOffsetOfCompressed) {
+ if (!SnappyCompressionSupported()) {
+ fprintf(stderr, "skipping compression tests\n");
+ return;
+ }
+
+ Random rnd(301);
+ TableConstructor c(BytewiseComparator());
+ std::string tmp;
+ c.Add("k01", "hello");
+ c.Add("k02", test::CompressibleString(&rnd, 0.25, 10000, &tmp));
+ c.Add("k03", "hello3");
+ c.Add("k04", test::CompressibleString(&rnd, 0.25, 10000, &tmp));
+ std::vector<std::string> keys;
+ KVMap kvmap;
+ Options options;
+ options.block_size = 1024;
+ options.compression = kSnappyCompression;
+ c.Finish(options, &keys, &kvmap);
+
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, 0));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), 2000, 3000));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), 2000, 3000));
+ ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 4000, 6000));
+}
+
+} // namespace leveldb
+
+int main(int argc, char** argv) {
+ return leveldb::test::RunAllTests();
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-07-08 11:07:51 +0000