112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
// 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 "db/dbformat.h"
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#include "util/logging.h"
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#include "util/testharness.h"
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namespace leveldb {
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static std::string IKey(const std::string& user_key,
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uint64_t seq,
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ValueType vt) {
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std::string encoded;
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AppendInternalKey(&encoded, ParsedInternalKey(user_key, seq, vt));
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return encoded;
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}
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static std::string Shorten(const std::string& s, const std::string& l) {
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std::string result = s;
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InternalKeyComparator(BytewiseComparator()).FindShortestSeparator(&result, l);
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return result;
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}
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static std::string ShortSuccessor(const std::string& s) {
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std::string result = s;
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InternalKeyComparator(BytewiseComparator()).FindShortSuccessor(&result);
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return result;
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}
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static void TestKey(const std::string& key,
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uint64_t seq,
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ValueType vt) {
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std::string encoded = IKey(key, seq, vt);
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Slice in(encoded);
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ParsedInternalKey decoded("", 0, kTypeValue);
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ASSERT_TRUE(ParseInternalKey(in, &decoded));
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ASSERT_EQ(key, decoded.user_key.ToString());
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ASSERT_EQ(seq, decoded.sequence);
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ASSERT_EQ(vt, decoded.type);
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ASSERT_TRUE(!ParseInternalKey(Slice("bar"), &decoded));
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}
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class FormatTest { };
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TEST(FormatTest, InternalKey_EncodeDecode) {
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const char* keys[] = { "", "k", "hello", "longggggggggggggggggggggg" };
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const uint64_t seq[] = {
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1, 2, 3,
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(1ull << 8) - 1, 1ull << 8, (1ull << 8) + 1,
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(1ull << 16) - 1, 1ull << 16, (1ull << 16) + 1,
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(1ull << 32) - 1, 1ull << 32, (1ull << 32) + 1
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};
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for (int k = 0; k < sizeof(keys) / sizeof(keys[0]); k++) {
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for (int s = 0; s < sizeof(seq) / sizeof(seq[0]); s++) {
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TestKey(keys[k], seq[s], kTypeValue);
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TestKey("hello", 1, kTypeDeletion);
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}
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}
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}
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TEST(FormatTest, InternalKeyShortSeparator) {
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// When user keys are same
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ASSERT_EQ(IKey("foo", 100, kTypeValue),
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Shorten(IKey("foo", 100, kTypeValue),
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IKey("foo", 99, kTypeValue)));
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ASSERT_EQ(IKey("foo", 100, kTypeValue),
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Shorten(IKey("foo", 100, kTypeValue),
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IKey("foo", 101, kTypeValue)));
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ASSERT_EQ(IKey("foo", 100, kTypeValue),
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Shorten(IKey("foo", 100, kTypeValue),
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IKey("foo", 100, kTypeValue)));
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ASSERT_EQ(IKey("foo", 100, kTypeValue),
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Shorten(IKey("foo", 100, kTypeValue),
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IKey("foo", 100, kTypeDeletion)));
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// When user keys are misordered
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ASSERT_EQ(IKey("foo", 100, kTypeValue),
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Shorten(IKey("foo", 100, kTypeValue),
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IKey("bar", 99, kTypeValue)));
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// When user keys are different, but correctly ordered
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ASSERT_EQ(IKey("g", kMaxSequenceNumber, kValueTypeForSeek),
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Shorten(IKey("foo", 100, kTypeValue),
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IKey("hello", 200, kTypeValue)));
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// When start user key is prefix of limit user key
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ASSERT_EQ(IKey("foo", 100, kTypeValue),
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Shorten(IKey("foo", 100, kTypeValue),
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IKey("foobar", 200, kTypeValue)));
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// When limit user key is prefix of start user key
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ASSERT_EQ(IKey("foobar", 100, kTypeValue),
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Shorten(IKey("foobar", 100, kTypeValue),
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IKey("foo", 200, kTypeValue)));
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}
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TEST(FormatTest, InternalKeyShortestSuccessor) {
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ASSERT_EQ(IKey("g", kMaxSequenceNumber, kValueTypeForSeek),
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ShortSuccessor(IKey("foo", 100, kTypeValue)));
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ASSERT_EQ(IKey("\xff\xff", 100, kTypeValue),
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ShortSuccessor(IKey("\xff\xff", 100, kTypeValue)));
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}
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} // namespace leveldb
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int main(int argc, char** argv) {
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return leveldb::test::RunAllTests();
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}
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