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-rw-r--r--src/leveldb/issues/issue178_test.cc92
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+// Copyright (c) 2013 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.
+
+// Test for issue 178: a manual compaction causes deleted data to reappear.
+#include <iostream>
+#include <sstream>
+#include <cstdlib>
+
+#include "leveldb/db.h"
+#include "leveldb/write_batch.h"
+#include "util/testharness.h"
+
+namespace {
+
+const int kNumKeys = 1100000;
+
+std::string Key1(int i) {
+ char buf[100];
+ snprintf(buf, sizeof(buf), "my_key_%d", i);
+ return buf;
+}
+
+std::string Key2(int i) {
+ return Key1(i) + "_xxx";
+}
+
+class Issue178 { };
+
+TEST(Issue178, Test) {
+ // Get rid of any state from an old run.
+ std::string dbpath = leveldb::test::TmpDir() + "/leveldb_cbug_test";
+ DestroyDB(dbpath, leveldb::Options());
+
+ // Open database. Disable compression since it affects the creation
+ // of layers and the code below is trying to test against a very
+ // specific scenario.
+ leveldb::DB* db;
+ leveldb::Options db_options;
+ db_options.create_if_missing = true;
+ db_options.compression = leveldb::kNoCompression;
+ ASSERT_OK(leveldb::DB::Open(db_options, dbpath, &db));
+
+ // create first key range
+ leveldb::WriteBatch batch;
+ for (size_t i = 0; i < kNumKeys; i++) {
+ batch.Put(Key1(i), "value for range 1 key");
+ }
+ ASSERT_OK(db->Write(leveldb::WriteOptions(), &batch));
+
+ // create second key range
+ batch.Clear();
+ for (size_t i = 0; i < kNumKeys; i++) {
+ batch.Put(Key2(i), "value for range 2 key");
+ }
+ ASSERT_OK(db->Write(leveldb::WriteOptions(), &batch));
+
+ // delete second key range
+ batch.Clear();
+ for (size_t i = 0; i < kNumKeys; i++) {
+ batch.Delete(Key2(i));
+ }
+ ASSERT_OK(db->Write(leveldb::WriteOptions(), &batch));
+
+ // compact database
+ std::string start_key = Key1(0);
+ std::string end_key = Key1(kNumKeys - 1);
+ leveldb::Slice least(start_key.data(), start_key.size());
+ leveldb::Slice greatest(end_key.data(), end_key.size());
+
+ // commenting out the line below causes the example to work correctly
+ db->CompactRange(&least, &greatest);
+
+ // count the keys
+ leveldb::Iterator* iter = db->NewIterator(leveldb::ReadOptions());
+ size_t num_keys = 0;
+ for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
+ num_keys++;
+ }
+ delete iter;
+ ASSERT_EQ(kNumKeys, num_keys) << "Bad number of keys";
+
+ // close database
+ delete db;
+ DestroyDB(dbpath, leveldb::Options());
+}
+
+} // anonymous namespace
+
+int main(int argc, char** argv) {
+ return leveldb::test::RunAllTests();
+}