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test_interval_map.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2016 Red Hat
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <gtest/gtest.h>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int_distribution.hpp>
#include <boost/mpl/apply.hpp>
#include "include/buffer.h"
#include "common/interval_map.h"
using namespace std;
template<typename T>
class IntervalMapTest : public ::testing::Test {
public:
using TestType = T;
};
template <typename _key>
struct bufferlist_test_type {
using key = _key;
using value = bufferlist;
struct make_splitter {
template <typename merge_t>
struct apply {
bufferlist split(
key offset,
key len,
bufferlist &bu) const {
bufferlist bl;
bl.substr_of(bu, offset, len);
return bl;
}
bool can_merge(const bufferlist &left, const bufferlist &right) const {
return merge_t::value;
}
bufferlist merge(bufferlist &&left, bufferlist &&right) const {
bufferlist bl;
left.claim_append(right);
return left;
}
uint64_t length(const bufferlist &r) const {
return r.length();
}
};
};
struct generate_random {
bufferlist operator()(key len) {
bufferlist bl;
boost::random::mt19937 rng;
boost::random::uniform_int_distribution<> chr(0,255);
for (key i = 0; i < len; ++i) {
bl.append((char)chr(rng));
}
return bl;
}
};
};
using IntervalMapTypes = ::testing::Types< bufferlist_test_type<uint64_t> >;
TYPED_TEST_CASE(IntervalMapTest, IntervalMapTypes);
#define USING(_can_merge) \
using TT = typename TestFixture::TestType; \
using key = typename TT::key; (void)key(0); \
using val = typename TT::value; (void)val(0); \
using splitter = typename boost::mpl::apply< \
typename TT::make_splitter, \
_can_merge>; \
using imap = interval_map<key, val, splitter>; (void)imap(); \
typename TT::generate_random gen; \
val v(gen(5)); \
splitter split; (void)split.split(0, 0, v);
#define USING_NO_MERGE USING(std::false_type)
#define USING_WITH_MERGE USING(std::true_type)
TYPED_TEST(IntervalMapTest, empty) {
USING_NO_MERGE;
imap m;
ASSERT_TRUE(m.empty());
}
TYPED_TEST(IntervalMapTest, insert) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5)};
m.insert(0, 5, vals[0]);
m.insert(10, 5, vals[2]);
m.insert(5, 5, vals[1]);
ASSERT_EQ(m.ext_count(), 3u);
unsigned i = 0;
for (auto &&ext: m) {
ASSERT_EQ(ext.get_len(), 5u);
ASSERT_EQ(ext.get_off(), 5u * i);
ASSERT_EQ(ext.get_val(), vals[i]);
++i;
}
ASSERT_EQ(i, m.ext_count());
}
TYPED_TEST(IntervalMapTest, insert_begin_overlap) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5)};
m.insert(5, 5, vals[1]);
m.insert(10, 5, vals[2]);
m.insert(1, 5, vals[0]);
auto iter = m.begin();
ASSERT_EQ(iter.get_off(), 1u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[0]);
++iter;
ASSERT_EQ(iter.get_off(), 6u);
ASSERT_EQ(iter.get_len(), 4u);
ASSERT_EQ(iter.get_val(), split.split(1, 4, vals[1]));
++iter;
ASSERT_EQ(iter.get_off(), 10u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[2]);
++iter;
ASSERT_EQ(iter, m.end());
}
TYPED_TEST(IntervalMapTest, insert_end_overlap) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5)};
m.insert(0, 5, vals[0]);
m.insert(5, 5, vals[1]);
m.insert(8, 5, vals[2]);
auto iter = m.begin();
ASSERT_EQ(iter.get_off(), 0u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[0]);
++iter;
ASSERT_EQ(iter.get_off(), 5u);
ASSERT_EQ(iter.get_len(), 3u);
ASSERT_EQ(iter.get_val(), split.split(0, 3, vals[1]));
++iter;
ASSERT_EQ(iter.get_off(), 8u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[2]);
++iter;
ASSERT_EQ(iter, m.end());
}
TYPED_TEST(IntervalMapTest, insert_middle_overlap) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(7), gen(5)};
m.insert(0, 5, vals[0]);
m.insert(10, 5, vals[2]);
m.insert(4, 7, vals[1]);
auto iter = m.begin();
ASSERT_EQ(iter.get_off(), 0u);
ASSERT_EQ(iter.get_len(), 4u);
ASSERT_EQ(iter.get_val(), split.split(0, 4, vals[0]));
++iter;
ASSERT_EQ(iter.get_off(), 4u);
ASSERT_EQ(iter.get_len(), 7u);
ASSERT_EQ(iter.get_val(), vals[1]);
++iter;
ASSERT_EQ(iter.get_off(), 11u);
ASSERT_EQ(iter.get_len(), 4u);
ASSERT_EQ(iter.get_val(), split.split(1, 4, vals[2]));
++iter;
ASSERT_EQ(iter, m.end());
}
TYPED_TEST(IntervalMapTest, insert_single_exact_overlap) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5)};
m.insert(0, 5, gen(5));
m.insert(5, 5, vals[1]);
m.insert(10, 5, vals[2]);
m.insert(0, 5, vals[0]);
auto iter = m.begin();
ASSERT_EQ(iter.get_off(), 0u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[0]);
++iter;
ASSERT_EQ(iter.get_off(), 5u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[1]);
++iter;
ASSERT_EQ(iter.get_off(), 10u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[2]);
++iter;
ASSERT_EQ(iter, m.end());
}
TYPED_TEST(IntervalMapTest, insert_single_exact_overlap_end) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5)};
m.insert(0, 5, vals[0]);
m.insert(5, 5, vals[1]);
m.insert(10, 5, gen(5));
m.insert(10, 5, vals[2]);
auto iter = m.begin();
ASSERT_EQ(iter.get_off(), 0u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[0]);
++iter;
ASSERT_EQ(iter.get_off(), 5u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[1]);
++iter;
ASSERT_EQ(iter.get_off(), 10u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[2]);
++iter;
ASSERT_EQ(iter, m.end());
}
TYPED_TEST(IntervalMapTest, erase) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5)};
m.insert(0, 5, vals[0]);
m.insert(5, 5, vals[1]);
m.insert(10, 5, vals[2]);
m.erase(3, 5);
auto iter = m.begin();
ASSERT_EQ(iter.get_off(), 0u);
ASSERT_EQ(iter.get_len(), 3u);
ASSERT_EQ(iter.get_val(), split.split(0, 3, vals[0]));
++iter;
ASSERT_EQ(iter.get_off(), 8u);
ASSERT_EQ(iter.get_len(), 2u);
ASSERT_EQ(iter.get_val(), split.split(3, 2, vals[1]));
++iter;
ASSERT_EQ(iter.get_off(), 10u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[2]);
++iter;
ASSERT_EQ(iter, m.end());
}
TYPED_TEST(IntervalMapTest, erase_exact) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5)};
m.insert(0, 5, vals[0]);
m.insert(5, 5, vals[1]);
m.insert(10, 5, vals[2]);
m.erase(5, 5);
auto iter = m.begin();
ASSERT_EQ(iter.get_off(), 0u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[0]);
++iter;
ASSERT_EQ(iter.get_off(), 10u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[2]);
++iter;
ASSERT_EQ(iter, m.end());
}
TYPED_TEST(IntervalMapTest, get_containing_range) {
USING_NO_MERGE;
imap m;
vector<val> vals{gen(5), gen(5), gen(5), gen(5)};
m.insert(0, 5, vals[0]);
m.insert(10, 5, vals[1]);
m.insert(20, 5, vals[2]);
m.insert(30, 5, vals[3]);
auto rng = m.get_containing_range(5, 21);
auto iter = rng.first;
ASSERT_EQ(iter.get_off(), 10u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[1]);
++iter;
ASSERT_EQ(iter.get_off(), 20u);
ASSERT_EQ(iter.get_len(), 5u);
ASSERT_EQ(iter.get_val(), vals[2]);
++iter;
ASSERT_EQ(iter, rng.second);
}
TYPED_TEST(IntervalMapTest, merge) {
USING_WITH_MERGE;
imap m;
m.insert(10, 4, gen(4));
m.insert(11, 1, gen(1));
}