thin-provisioning-tools/unit-tests/transaction_manager_t.cc

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// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
//
// thin-provisioning-tools is free software: you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// thin-provisioning-tools is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
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#include "gmock/gmock.h"
#include "persistent-data/transaction_manager.h"
#include "persistent-data/space-maps/core.h"
using namespace std;
using namespace persistent_data;
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using namespace testing;
//----------------------------------------------------------------
namespace {
unsigned const MAX_HELD_LOCKS = 16;
block_address const NR_BLOCKS = 1024;
transaction_manager::ptr
create_tm() {
block_manager::ptr bm(
new block_manager("./test.data", NR_BLOCKS, MAX_HELD_LOCKS, block_manager::READ_WRITE));
space_map::ptr sm{create_core_map(NR_BLOCKS)};
transaction_manager::ptr tm(new transaction_manager(bm, sm));
tm->get_sm()->inc(0);
return tm;
}
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typedef bcache::validator::ptr validator_ptr;
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validator_ptr mk_noop_validator() {
return bcache::validator::ptr(
new bcache::noop_validator);
}
typedef block_manager::write_ref write_ref;
}
//----------------------------------------------------------------
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TEST(TransactionManagerTests, commit_succeeds)
{
transaction_manager::ptr tm = create_tm();
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tm->begin(0, mk_noop_validator());
}
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TEST(TransactionManagerTests, shadowing)
{
transaction_manager::ptr tm = create_tm();
block_manager::write_ref superblock = tm->begin(0, mk_noop_validator());
space_map::ptr sm = tm->get_sm();
sm->inc(1);
block_address b;
{
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pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
b = p.first.get_location();
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ASSERT_THAT(b, Ne(1u));
ASSERT_FALSE(p.second);
ASSERT_THAT(sm->get_count(1), Eq(0u));
}
{
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pair<write_ref, bool> p = tm->shadow(b, mk_noop_validator());
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ASSERT_THAT(p.first.get_location(), Eq(b));
ASSERT_FALSE(p.second);
}
sm->inc(b);
{
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pair<write_ref, bool> p = tm->shadow(b, mk_noop_validator());
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ASSERT_THAT(p.first.get_location(), Ne(b));
ASSERT_TRUE(p.second);
}
}
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TEST(TransactionManagerTests, multiple_shadowing)
{
transaction_manager::ptr tm = create_tm();
space_map::ptr sm = tm->get_sm();
sm->set_count(1, 3);
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block_address b, b2;
{
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write_ref superblock = tm->begin(0, mk_noop_validator());
pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
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b = p.first.get_location();
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ASSERT_THAT(b, Ne(1u));
ASSERT_TRUE(p.second);
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sm->commit();
}
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{
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write_ref superblock = tm->begin(0, mk_noop_validator());
pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
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b2 = p.first.get_location();
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ASSERT_THAT(b2, Ne(1u));
ASSERT_THAT(b2, Ne(b));
ASSERT_TRUE(p.second);
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sm->commit();
}
{
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write_ref superblock = tm->begin(0, mk_noop_validator());
pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
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block_address b3 = p.first.get_location();
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ASSERT_THAT(b3, Ne(b2));
ASSERT_THAT(b3, Ne(b));
ASSERT_THAT(b3, Ne(1u));
ASSERT_FALSE(p.second);
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sm->commit();
}
}
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TEST(TransactionManagerTests, shadow_free_block_fails)
{
transaction_manager::ptr tm = create_tm();
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write_ref superblock = tm->begin(0, mk_noop_validator());
ASSERT_THROW(tm->shadow(1, mk_noop_validator()), runtime_error);
}
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//----------------------------------------------------------------