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test_union_storage.cpp
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test_union_storage.cpp
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/*------------------------------------------------------------------------------
*
* This file is part of rendermq
*
* Author: [email protected]
*
* Copyright 2010-1 Mapquest, Inc. All Rights reserved.
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*-----------------------------------------------------------------------------*/
#include "storage/null_storage.hpp"
#include "storage/union_storage.hpp"
#include "test/common.hpp"
#include <stdexcept>
#include <iostream>
#include <boost/noncopyable.hpp>
#include <boost/function.hpp>
#include <boost/format.hpp>
#include <boost/foreach.hpp>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int.hpp>
#include <boost/random/variate_generator.hpp>
#include <limits>
using boost::function;
using boost::shared_ptr;
using std::runtime_error;
using std::exception;
using std::cout;
using std::cerr;
using std::endl;
using std::string;
using std::numeric_limits;
using std::time_t;
using std::list;
using rendermq::union_storage;
using rendermq::null_storage;
using rendermq::tile_storage;
using rendermq::tile_protocol;
namespace
{
void assert_no_tile(const tile_protocol &t, const tile_storage &store)
{
shared_ptr<tile_storage::handle> handle = store.get(t);
if (handle->exists())
{
throw runtime_error((boost::format("Storage should not have tile %1%, but does.") % t).str());
}
}
void assert_exists_tile(const tile_protocol &t, const tile_storage &store)
{
shared_ptr<tile_storage::handle> handle = store.get(t);
if (!handle->exists())
{
throw runtime_error((boost::format("Storage should have tile %1%, but does not.") % t).str());
}
}
void assert_not_expired_tile(const tile_protocol &t, const tile_storage &store)
{
shared_ptr<tile_storage::handle> handle = store.get(t);
if (!handle->exists() || handle->expired())
{
throw runtime_error((boost::format("Storage should have tile %1% and it not be expired.") % t).str());
}
}
class exists_handle
: public tile_storage::handle
{
public:
bool exists() const { return true; }
time_t last_modified() const { std::time_t t = std::time(NULL); return t; }
bool data(string &str) const { str = ""; return true; }
bool expired() const { return false; }
};
class null_handle
: public tile_storage::handle
{
public:
bool exists() const { return false; }
time_t last_modified() const { return time_t(0); }
bool data(string &) const { return false; }
bool expired() const { return false; }
};
// even numbered tiles (x + y) & 1 == 0 exist, others are null
class predicate_tiles_exist
: public tile_storage
{
public:
predicate_tiles_exist(boost::function<bool (const tile_protocol &)> pred)
: m_pred(pred)
{
}
shared_ptr<tile_storage::handle> get(const tile_protocol &tile) const
{
if (m_pred(tile))
{
return shared_ptr<tile_storage::handle>(new exists_handle());
}
else
{
return shared_ptr<tile_storage::handle>(new null_handle());
}
}
bool get_meta(const tile_protocol &tile, string &str) const
{
if (m_pred(tile))
{
str = "";
return true;
}
else
{
return false;
}
}
bool put_meta(const tile_protocol &tile, const string &str) const
{
return m_pred(tile);
}
bool expire(const tile_protocol &tile) const
{
return m_pred(tile);
}
private:
boost::function<bool (const tile_protocol &)> m_pred;
};
bool is_even_tile(const tile_protocol &tile)
{
return ((tile.x + tile.y) & 1) == 0;
}
bool is_odd_tile(const tile_protocol &tile)
{
return ((tile.x + tile.y) & 1) == 1;
}
class recording_storage
: public tile_storage
{
public:
shared_ptr<tile_storage::handle> get(const tile_protocol &tile) const
{
gets.push_back(tile);
return shared_ptr<tile_storage::handle>(new null_handle());
}
bool get_meta(const tile_protocol &tile, string &str) const
{
gets.push_back(tile);
return false;
}
bool put_meta(const tile_protocol &tile, const string &str) const
{
puts.push_back(tile);
return false;
}
bool expire(const tile_protocol &tile) const
{
puts.push_back(tile);
return false;
}
mutable list<tile_protocol> gets, puts;
};
class randomized_tester
{
public:
randomized_tester();
virtual ~randomized_tester() {}
virtual void test(const tile_protocol &, tile_storage &) = 0;
void operator()();
virtual void finally() {}
protected:
union_storage::list_of_storage_t storages;
private:
boost::mt19937 prng;
boost::uniform_int<int> dist;
boost::variate_generator<boost::mt19937 &, boost::uniform_int<int> > rand;
};
randomized_tester::randomized_tester()
: storages(), prng(),
dist(numeric_limits<int>::min(), numeric_limits<int>::max()),
rand(prng, dist)
{
}
void randomized_tester::operator()()
{
union_storage storage(storages);
for (int i = 0; i < 100000; ++i)
{
// random zoom level from 0 to 19
int z = rand() % 19;
// random tiles within the allowed zoom range (not that it
// really matters for this test...)
int x = rand() & ((1 << z) - 1);
int y = rand() & ((1 << z) - 1);
tile_protocol tile(rendermq::cmdRender, x, y, z, 0, "style", rendermq::fmtPNG, 0, 0);
test(tile, storage);
}
finally();
}
class test_union_of_nulls_is_null
: public randomized_tester
{
public:
test_union_of_nulls_is_null() : randomized_tester()
{
storages.push_back(shared_ptr<tile_storage>(new null_storage()));
storages.push_back(shared_ptr<tile_storage>(new null_storage()));
}
void test(const tile_protocol &t, tile_storage &storage)
{
assert_no_tile(t, storage);
}
};
class test_empty_union_is_null
: public randomized_tester
{
public:
test_empty_union_is_null() : randomized_tester() {}
void test(const tile_protocol &t, tile_storage &storage)
{
assert_no_tile(t, storage);
}
};
class test_odd_and_even_is_full
: public randomized_tester
{
public:
test_odd_and_even_is_full() : randomized_tester()
{
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_even_tile)));
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_odd_tile)));
}
void test(const tile_protocol &t, tile_storage &storage)
{
assert_exists_tile(t, storage);
assert_not_expired_tile(t, storage);
}
};
class test_odd_and_even_pass_thru
: public randomized_tester
{
public:
test_odd_and_even_pass_thru()
: randomized_tester(),
record(new recording_storage())
{
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_even_tile)));
storages.push_back(shared_ptr<tile_storage>(record));
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_odd_tile)));
}
void test(const tile_protocol &t, tile_storage &storage)
{
assert_exists_tile(t, storage);
string dummy;
if (!storage.get_meta(t, dummy))
{
throw runtime_error((boost::format("Metatile %1% could not be got.") % t).str());
}
}
void finally()
{
BOOST_FOREACH(const tile_protocol &t, record->gets)
{
if (is_even_tile(t))
{
throw runtime_error((boost::format("Tile %1% is an even tile, and should not have been attempted to be got after the even tile layer in the storage.") % t).str());
}
}
}
private:
// NOTE: don't need to delete this, as it's done when the storages object
// in the base class is collected. it's only here so that it can be used
// in the 'finally' method.
recording_storage *record;
};
class test_put_puts_to_all
: public randomized_tester
{
public:
test_put_puts_to_all()
: randomized_tester(),
record(new recording_storage())
{
storages.push_back(shared_ptr<tile_storage>(new null_storage()));
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_even_tile)));
storages.push_back(shared_ptr<tile_storage>(record));
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_odd_tile)));
}
void test(const tile_protocol &t, tile_storage &storage)
{
tiles.push_back(t);
if (storage.put_meta(t, ""))
{
throw runtime_error((boost::format("There's a null storage in the chain - put_meta shouldn't return true, ever, even for tile %1%.") % t).str());
}
}
void finally()
{
list<tile_protocol>::iterator itr = tiles.begin();
list<tile_protocol>::iterator jtr = record->puts.begin();
for (; (itr != tiles.end()) && (jtr != record->puts.end()); ++itr, ++jtr)
{
if (!(*itr == *jtr))
{
throw runtime_error((boost::format("Record of tile puts doesn't match: %1% != %2%.") % *itr % *jtr).str());
}
}
}
private:
// see comment in test_odd_and_even_pass_thru
recording_storage *record;
list<tile_protocol> tiles;
};
class test_expire_expires_from_all
: public randomized_tester
{
public:
test_expire_expires_from_all()
: randomized_tester(),
record(new recording_storage())
{
storages.push_back(shared_ptr<tile_storage>(new null_storage()));
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_even_tile)));
storages.push_back(shared_ptr<tile_storage>(record));
storages.push_back(shared_ptr<tile_storage>(new predicate_tiles_exist(&is_odd_tile)));
}
void test(const tile_protocol &t, tile_storage &storage)
{
tiles.push_back(t);
if (storage.expire(t))
{
throw runtime_error((boost::format("There's a null storage in the chain - expire shouldn't return true, ever, even for tile %1%.") % t).str());
}
}
void finally()
{
list<tile_protocol>::iterator itr = tiles.begin();
list<tile_protocol>::iterator jtr = record->puts.begin();
for (; (itr != tiles.end()) && (jtr != record->puts.end()); ++itr, ++jtr)
{
if (!(*itr == *jtr))
{
throw runtime_error((boost::format("Record of tile expiries doesn't match: %1% != %2%.") % *itr % *jtr).str());
}
}
}
private:
// see comment in test_odd_and_even_pass_thru
recording_storage *record;
list<tile_protocol> tiles;
};
} // anonymous namespace
int main()
{
int tests_failed = 0;
cout << "== Testing Union Storage Backend ==" << endl << endl;
{
test_union_of_nulls_is_null test;
tests_failed += test::run("test_union_of_nulls_is_null", boost::ref(test));
}
{
test_empty_union_is_null test;
tests_failed += test::run("test_empty_union_is_null", boost::ref(test));
}
{
test_odd_and_even_is_full test;
tests_failed += test::run("test_odd_and_even_is_full", boost::ref(test));
}
{
test_odd_and_even_pass_thru test;
tests_failed += test::run("test_odd_and_even_pass_thru", boost::ref(test));
}
{
test_put_puts_to_all test;
tests_failed += test::run("test_put_puts_to_all", boost::ref(test));
}
{
test_expire_expires_from_all test;
tests_failed += test::run("test_expire_expires_from_all", boost::ref(test));
}
//tests_failed += test::run("test_", &test_);
cout << " >> Tests failed: " << tests_failed << endl << endl;
return 0;
}