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/*
* Copyright (C) 2021 Matthieu Gautier <mgautier@kymeria.fr>
*
* This program 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 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
* NON-INFRINGEMENT. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "tools.h"
#include "buffer_reader.h"
#include "file_reader.h"
#include "fs.h"
#include "file_compound.h"
#include "gtest/gtest.h"
namespace
{
using namespace zim;
using zim::unittests::makeTempFile;
////////////////////////////////////////////////////////////////////////////////
// FileReader
////////////////////////////////////////////////////////////////////////////////
std::unique_ptr<Reader> createFileReader(const char* data, zsize_t size) {
const auto tmpfile = makeTempFile("data", data);
auto fd = DEFAULTFS::openFile(tmpfile->path());
return std::unique_ptr<Reader>(new FileReader(std::make_shared<typename DEFAULTFS::FD>(std::move(fd)), offset_t(0), size));
}
std::unique_ptr<Reader> createMultiFileReader(const char* data, zsize_t size) {
const auto tmpfile = makeTempFile("data", data);
auto fileCompound = std::make_shared<FileCompound>(tmpfile->path());
return std::unique_ptr<Reader>(new MultiPartFileReader(fileCompound));
}
std::unique_ptr<Reader> createBufferReader(const char* data, zsize_t size) {
auto buffer = Buffer::makeBuffer(data, size);
return std::unique_ptr<Reader>(new BufferReader(buffer));
}
auto createReaders = {
createFileReader,
createMultiFileReader,
createBufferReader
};
TEST(FileReader, shouldJustWork)
{
char data[] = "abcdefghijklmnopqrstuvwxyz";
for(auto& createReader:createReaders) {
auto baseOffset = createReader==createBufferReader ? ((offset_type)data) : 0;
auto reader = createReader(data, zsize_t(26));
ASSERT_EQ(offset_t(baseOffset+0), reader->offset());
ASSERT_EQ(zsize_t(sizeof(data)-1), reader->size());
ASSERT_EQ('a', reader->read(offset_t(0)));
ASSERT_EQ('e', reader->read(offset_t(4)));
char out[4] = {0, 0, 0, 0};
reader->read(out, offset_t(0), zsize_t(4));
ASSERT_EQ(0, memcmp(out, "abcd", 4));
reader->read(out, offset_t(5), zsize_t(2));
ASSERT_EQ(0, memcmp(out, "fgcd", 4));
reader->read(out, offset_t(10), zsize_t(0));
ASSERT_EQ(0, memcmp(out, "fgcd", 4));
reader->read(out, offset_t(10), zsize_t(4));
ASSERT_EQ(0, memcmp(out, "klmn", 4));
// Can read last bit of the file.
ASSERT_EQ('z', reader->read(offset_t(25)));
reader->read(out, offset_t(25), zsize_t(1));
ASSERT_EQ(0, memcmp(out, "zlmn", 4));
// Fail if we try to read out of the file.
ASSERT_THROW(reader->read(offset_t(26)), std::runtime_error);
ASSERT_THROW(reader->read(out, offset_t(25), zsize_t(4)), std::runtime_error);
ASSERT_THROW(reader->read(out, offset_t(30), zsize_t(4)), std::runtime_error);
ASSERT_THROW(reader->read(out, offset_t(30), zsize_t(0)), std::runtime_error);
}
}
TEST(FileReader, subReader)
{
char data[] = "abcdefghijklmnopqrstuvwxyz";
for(auto& createReader:createReaders) {
auto baseOffset = createReader==createBufferReader ? ((offset_type)data) : 0;
auto reader = createReader(data, zsize_t(26));
auto subReader = reader->sub_reader(offset_t(4), zsize_t(20));
ASSERT_EQ(offset_t(baseOffset+4), subReader->offset());
ASSERT_EQ(zsize_t(20), subReader->size());
ASSERT_EQ('e', subReader->read(offset_t(0)));
ASSERT_EQ('i', subReader->read(offset_t(4)));
char out[4] = {0, 0, 0, 0};
subReader->read(out, offset_t(0), zsize_t(4));
ASSERT_EQ(0, memcmp(out, "efgh", 4));
subReader->read(out, offset_t(5), zsize_t(2));
ASSERT_EQ(0, memcmp(out, "jkgh", 4));
// Can read last bit of the file.
ASSERT_EQ('x', subReader->read(offset_t(19)));
subReader->read(out, offset_t(19), zsize_t(1));
ASSERT_EQ(0, memcmp(out, "xkgh", 4));
// Fail if we try to read out of the file.
ASSERT_THROW(subReader->read(offset_t(20)), std::runtime_error);
ASSERT_THROW(subReader->read(out, offset_t(18), zsize_t(4)), std::runtime_error);
ASSERT_THROW(subReader->read(out, offset_t(30), zsize_t(4)), std::runtime_error);
ASSERT_THROW(subReader->read(out, offset_t(30), zsize_t(0)), std::runtime_error);
}
}
TEST(FileReader, zeroReader)
{
char data[] = "";
for(auto& createReader:createReaders) {
auto baseOffset = createReader==createBufferReader ? ((offset_type)data) : 0;
auto reader = createReader(data, zsize_t(0));
ASSERT_EQ(offset_t(baseOffset), reader->offset());
ASSERT_EQ(zsize_t(0), reader->size());
// Fail if we try to read out of the file.
ASSERT_THROW(reader->read(offset_t(0)), std::runtime_error);
char out[4] = {0, 0, 0, 0};
ASSERT_THROW(reader->read(out, offset_t(0), zsize_t(4)), std::runtime_error);
// Ok to read 0 byte on a 0 sized reader
reader->read(out, offset_t(0), zsize_t(0));
const char nullarray[] = {0, 0, 0, 0};
ASSERT_EQ(0, memcmp(out, nullarray, 4));
}
}
} // unnamed namespace
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