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