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#include "testing/testing.hpp"
#include "coding/reader.hpp"
#include "coding/text_storage.hpp"
#include "coding/writer.hpp"
#include <cstdint>
#include <random>
#include <string>
#include <vector>
using namespace coding;
using namespace std;
namespace
{
template <typename Engine>
string GenerateRandomString(Engine & engine)
{
int const kMinLength = 0;
int const kMaxLength = 400;
int const kMinByte = 0;
int const kMaxByte = 255;
uniform_int_distribution<int> length(kMinLength, kMaxLength);
uniform_int_distribution<int> byte(kMinByte, kMaxByte);
string s(length(engine), '\0');
for (auto & b : s)
b = byte(engine);
return s;
}
void DumpStrings(vector<string> const & strings, uint64_t blockSize, vector<uint8_t> & buffer)
{
MemWriter<vector<uint8_t>> writer(buffer);
BlockedTextStorageWriter<decltype(writer)> ts(writer, blockSize);
for (auto const & s : strings)
ts.Append(s);
}
UNIT_TEST(TextStorage_Smoke)
{
vector<uint8_t> buffer;
DumpStrings({} /* strings */, 10 /* blockSize */, buffer);
{
MemReader reader(buffer.data(), buffer.size());
BlockedTextStorageIndex index;
index.Read(reader);
TEST_EQUAL(index.GetNumStrings(), 0, ());
TEST_EQUAL(index.GetNumBlockInfos(), 0, ());
}
{
MemReader reader(buffer.data(), buffer.size());
BlockedTextStorageReader<decltype(reader)> ts(reader);
TEST_EQUAL(ts.GetNumStrings(), 0, ());
}
}
UNIT_TEST(TextStorage_Simple)
{
vector<string> const strings = {{"", "Hello", "Hello, World!", "Hola mundo", "Smoke test"}};
vector<uint8_t> buffer;
DumpStrings(strings, 10 /* blockSize */, buffer);
{
MemReader reader(buffer.data(), buffer.size());
BlockedTextStorageIndex index;
index.Read(reader);
TEST_EQUAL(index.GetNumStrings(), strings.size(), ());
TEST_EQUAL(index.GetNumBlockInfos(), 3, ());
}
{
MemReader reader(buffer.data(), buffer.size());
BlockedTextStorageReader<MemReader> ts(reader);
TEST_EQUAL(ts.GetNumStrings(), strings.size(), ());
for (size_t i = 0; i < ts.GetNumStrings(); ++i)
TEST_EQUAL(ts.ExtractString(i), strings[i], ());
}
}
UNIT_TEST(TextStorage_Empty)
{
vector<string> strings;
for (int i = 0; i < 1000; ++i) {
strings.emplace_back(string(1 /* size */, i % 256));
for (int j = 0; j < 1000; ++j)
strings.emplace_back();
}
vector<uint8_t> buffer;
DumpStrings(strings, 5 /* blockSize */, buffer);
{
MemReader reader(buffer.data(), buffer.size());
BlockedTextStorageReader<MemReader> ts(reader);
TEST_EQUAL(ts.GetNumStrings(), strings.size(), ());
for (size_t i = 0; i < ts.GetNumStrings(); ++i)
TEST_EQUAL(ts.ExtractString(i), strings[i], ());
}
}
UNIT_TEST(TextStorage_Random)
{
int const kSeed = 42;
int const kNumStrings = 1000;
int const kBlockSize = 100;
mt19937 engine(kSeed);
vector<string> strings;
for (int i = 0; i < kNumStrings; ++i)
strings.push_back(GenerateRandomString(engine));
vector<uint8_t> buffer;
DumpStrings(strings, kBlockSize, buffer);
MemReader reader(buffer.data(), buffer.size());
BlockedTextStorageReader<MemReader> ts(reader);
TEST_EQUAL(ts.GetNumStrings(), strings.size(), ());
for (size_t i = 0; i < ts.GetNumStrings(); ++i)
TEST_EQUAL(ts.ExtractString(i), strings[i], ());
ts.ClearCache();
for (size_t i = ts.GetNumStrings() - 1; i < ts.GetNumStrings(); --i)
TEST_EQUAL(ts.ExtractString(i), strings[i], ());
}
} // namespace
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