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132 lignes
3.6 KiB
132 lignes
3.6 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "gtest/gtest.h"
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#include "db/memtable.h"
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#include "db/write_batch_internal.h"
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#include "leveldb/db.h"
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#include "leveldb/env.h"
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#include "util/logging.h"
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namespace leveldb {
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static std::string PrintContents(WriteBatch* b) {
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InternalKeyComparator cmp(BytewiseComparator());
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MemTable* mem = new MemTable(cmp);
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mem->Ref();
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std::string state;
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Status s = WriteBatchInternal::InsertInto(b, mem);
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int count = 0;
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Iterator* iter = mem->NewIterator();
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for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
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ParsedInternalKey ikey;
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EXPECT_TRUE(ParseInternalKey(iter->key(), &ikey));
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switch (ikey.type) {
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case kTypeValue:
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state.append("Put(");
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state.append(ikey.user_key.ToString());
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state.append(", ");
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state.append(iter->value().ToString());
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state.append(")");
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count++;
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break;
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case kTypeDeletion:
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state.append("Delete(");
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state.append(ikey.user_key.ToString());
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state.append(")");
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count++;
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break;
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}
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state.append("@");
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state.append(NumberToString(ikey.sequence));
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}
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delete iter;
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if (!s.ok()) {
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state.append("ParseError()");
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} else if (count != WriteBatchInternal::Count(b)) {
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state.append("CountMismatch()");
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}
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mem->Unref();
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return state;
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}
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TEST(WriteBatchTest, Empty) {
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WriteBatch batch;
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ASSERT_EQ("", PrintContents(&batch));
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ASSERT_EQ(0, WriteBatchInternal::Count(&batch));
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}
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TEST(WriteBatchTest, Multiple) {
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WriteBatch batch;
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batch.Put(Slice("foo"), Slice("bar"));
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batch.Delete(Slice("box"));
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batch.Put(Slice("baz"), Slice("boo"));
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WriteBatchInternal::SetSequence(&batch, 100);
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ASSERT_EQ(100, WriteBatchInternal::Sequence(&batch));
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ASSERT_EQ(3, WriteBatchInternal::Count(&batch));
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ASSERT_EQ(
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"Put(baz, boo)@102"
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"Delete(box)@101"
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"Put(foo, bar)@100",
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PrintContents(&batch));
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}
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TEST(WriteBatchTest, Corruption) {
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WriteBatch batch;
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batch.Put(Slice("foo"), Slice("bar"));
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batch.Delete(Slice("box"));
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WriteBatchInternal::SetSequence(&batch, 200);
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Slice contents = WriteBatchInternal::Contents(&batch);
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WriteBatchInternal::SetContents(&batch,
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Slice(contents.data(), contents.size() - 1));
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ASSERT_EQ(
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"Put(foo, bar)@200"
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"ParseError()",
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PrintContents(&batch));
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}
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TEST(WriteBatchTest, Append) {
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WriteBatch b1, b2;
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WriteBatchInternal::SetSequence(&b1, 200);
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WriteBatchInternal::SetSequence(&b2, 300);
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b1.Append(b2);
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ASSERT_EQ("", PrintContents(&b1));
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b2.Put("a", "va");
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b1.Append(b2);
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ASSERT_EQ("Put(a, va)@200", PrintContents(&b1));
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b2.Clear();
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b2.Put("b", "vb");
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b1.Append(b2);
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ASSERT_EQ(
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"Put(a, va)@200"
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"Put(b, vb)@201",
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PrintContents(&b1));
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b2.Delete("foo");
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b1.Append(b2);
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ASSERT_EQ(
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"Put(a, va)@200"
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"Put(b, vb)@202"
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"Put(b, vb)@201"
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"Delete(foo)@203",
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PrintContents(&b1));
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}
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TEST(WriteBatchTest, ApproximateSize) {
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WriteBatch batch;
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size_t empty_size = batch.ApproximateSize();
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batch.Put(Slice("foo"), Slice("bar"));
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size_t one_key_size = batch.ApproximateSize();
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ASSERT_LT(empty_size, one_key_size);
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batch.Put(Slice("baz"), Slice("boo"));
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size_t two_keys_size = batch.ApproximateSize();
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ASSERT_LT(one_key_size, two_keys_size);
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batch.Delete(Slice("box"));
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size_t post_delete_size = batch.ApproximateSize();
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ASSERT_LT(two_keys_size, post_delete_size);
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}
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} // namespace leveldb
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