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#include "testing/testing.hpp"
#include "coding/reader_cache.hpp"
#include "coding/reader.hpp"
#include <algorithm>
#include <random>
#include <string>
#include <vector>
using namespace std;
namespace
{
template <class ReaderT> class CacheReader
{
public:
CacheReader(ReaderT const & reader, uint32_t logPageSize, uint32_t logPageCount)
: m_Reader(reader), m_Cache(logPageSize, logPageCount) {}
void Read(uint64_t pos, void * p, size_t size) const
{
m_Cache.Read(m_Reader, pos, p, size);
}
private:
ReaderT m_Reader;
ReaderCache<ReaderT const> mutable m_Cache;
};
}
UNIT_TEST(CacheReaderRandomTest)
{
vector<char> data(100000);
for (size_t i = 0; i < data.size(); ++i)
data[i] = static_cast<char>(i % 253);
MemReader memReader(&data[0], data.size());
CacheReader<MemReader> cacheReader(MemReader(&data[0], data.size()), 10, 5);
mt19937 rng(0);
for (size_t i = 0; i < 100000; ++i)
{
size_t pos = rng() % data.size();
size_t len = min(static_cast<size_t>(1 + (rng() % 127)), data.size() - pos);
string readMem(len, '0'), readCache(len, '0');
memReader.Read(pos, &readMem[0], len);
cacheReader.Read(pos, &readCache[0], len);
TEST_EQUAL(readMem, readCache, (pos, len, i));
}
}
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