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https://github.com/google/leveldb.git
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36a5f8ed7f
- Replace raw slice comparison with a call to user comparator.
Added test for custom comparators.
- Fix end of namespace comments.
- Fixed bug in picking inputs for a level-0 compaction.
When finding overlapping files, the covered range may expand
as files are added to the input set. We now correctly expand
the range when this happens instead of continuing to use the
old range. For example, suppose L0 contains files with the
following ranges:
F1: a .. d
F2: c .. g
F3: f .. j
and the initial compaction target is F3. We used to search
for range f..j which yielded {F2,F3}. However we now expand
the range as soon as another file is added. In this case,
when F2 is added, we expand the range to c..j and restart the
search. That picks up file F1 as well.
This change fixes a bug related to deleted keys showing up
incorrectly after a compaction as described in Issue 44.
(Sync with upstream @25072954)
113 lines
3.7 KiB
C++
113 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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