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// 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 "gtest/gtest.h"
#include "db/memtable.h"
#include "db/write_batch_internal.h"
#include "leveldb/db.h"
#include "leveldb/env.h"
#include "util/logging.h"
namespace leveldb {
static std::string PrintContents(WriteBatch* b) {
InternalKeyComparator cmp(BytewiseComparator());
MemTable* mem = new MemTable(cmp);
mem->Ref();
std::string state;
Status s = WriteBatchInternal::InsertInto(b, mem);
int count = 0;
Iterator* iter = mem->NewIterator();
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ParsedInternalKey ikey;
EXPECT_TRUE(ParseInternalKey(iter->key(), &ikey));
switch (ikey.type) {
case kTypeValue:
state.append("Put(");
state.append(ikey.user_key.ToString());
state.append(", ");
state.append(iter->value().ToString());
state.append(")");
count++;
break;
case kTypeDeletion:
state.append("Delete(");
state.append(ikey.user_key.ToString());
state.append(")");
count++;
break;
}
state.append("@");
state.append(NumberToString(ikey.sequence));
}
delete iter;
if (!s.ok()) {
state.append("ParseError()");
} else if (count != WriteBatchInternal::Count(b)) {
state.append("CountMismatch()");
}
mem->Unref();
return state;
}
TEST(WriteBatchTest, Empty) {
WriteBatch batch;
ASSERT_EQ("", PrintContents(&batch));
ASSERT_EQ(0, WriteBatchInternal::Count(&batch));
}
TEST(WriteBatchTest, Multiple) {
WriteBatch batch;
batch.Put(Slice("foo"), Slice("bar"));
batch.Delete(Slice("box"));
batch.Put(Slice("baz"), Slice("boo"));
WriteBatchInternal::SetSequence(&batch, 100);
ASSERT_EQ(100, WriteBatchInternal::Sequence(&batch));
ASSERT_EQ(3, WriteBatchInternal::Count(&batch));
ASSERT_EQ(
"Put(baz, boo)@102"
"Delete(box)@101"
"Put(foo, bar)@100",
PrintContents(&batch));
}
TEST(WriteBatchTest, Corruption) {
WriteBatch batch;
batch.Put(Slice("foo"), Slice("bar"));
batch.Delete(Slice("box"));
WriteBatchInternal::SetSequence(&batch, 200);
Slice contents = WriteBatchInternal::Contents(&batch);
WriteBatchInternal::SetContents(&batch,
Slice(contents.data(), contents.size() - 1));
ASSERT_EQ(
"Put(foo, bar)@200"
"ParseError()",
PrintContents(&batch));
}
TEST(WriteBatchTest, Append) {
WriteBatch b1, b2;
WriteBatchInternal::SetSequence(&b1, 200);
WriteBatchInternal::SetSequence(&b2, 300);
b1.Append(b2);
ASSERT_EQ("", PrintContents(&b1));
b2.Put("a", "va");
b1.Append(b2);
ASSERT_EQ("Put(a, va)@200", PrintContents(&b1));
b2.Clear();
b2.Put("b", "vb");
b1.Append(b2);
ASSERT_EQ(
"Put(a, va)@200"
"Put(b, vb)@201",
PrintContents(&b1));
b2.Delete("foo");
b1.Append(b2);
ASSERT_EQ(
"Put(a, va)@200"
"Put(b, vb)@202"
"Put(b, vb)@201"
"Delete(foo)@203",
PrintContents(&b1));
}
TEST(WriteBatchTest, ApproximateSize) {
WriteBatch batch;
size_t empty_size = batch.ApproximateSize();
batch.Put(Slice("foo"), Slice("bar"));
size_t one_key_size = batch.ApproximateSize();
ASSERT_LT(empty_size, one_key_size);
batch.Put(Slice("baz"), Slice("boo"));
size_t two_keys_size = batch.ApproximateSize();
ASSERT_LT(one_key_size, two_keys_size);
batch.Delete(Slice("box"));
size_t post_delete_size = batch.ApproximateSize();
ASSERT_LT(two_keys_size, post_delete_size);
}
} // namespace leveldb
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