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/*
Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file test/file_group_test.cc
* @brief Test FileGroup class.
* @ingroup selfcontained
*/
#include "lib/file_group.h"
#include <boost/test/unit_test.hpp>
#include <boost/filesystem.hpp>
#include <stdint.h>
#include <cstdio>
using std::vector;
BOOST_AUTO_TEST_CASE (file_group_test)
{
/* Random data; must be big enough for all the files */
uint8_t data[65536];
for (int i = 0; i < 65536; ++i) {
data[i] = rand() & 0xff;
}
int const num_files = 4;
int length[] = {
99,
18941,
33110,
42
};
int total_length = 0;
for (int i = 0; i < num_files; ++i) {
total_length += length[i];
}
boost::filesystem::create_directories ("build/test/file_group_test");
vector<boost::filesystem::path> name = {
"build/test/file_group_test/A",
"build/test/file_group_test/B",
"build/test/file_group_test/C",
"build/test/file_group_test/D"
};
int base = 0;
for (int i = 0; i < num_files; ++i) {
auto f = fopen (name[i].string().c_str(), "wb");
fwrite (data + base, 1, length[i], f);
fclose (f);
base += length[i];
}
FileGroup fg (name);
uint8_t test[65536];
int pos = 0;
/* Basic read from 0 */
BOOST_CHECK_EQUAL(fg.read(test, 64).bytes_read, 64);
BOOST_CHECK_EQUAL (memcmp(data, test, 64), 0);
pos += 64;
/* Another read following the previous */
BOOST_CHECK_EQUAL(fg.read(test, 4).bytes_read, 4);
BOOST_CHECK_EQUAL (memcmp(data + pos, test, 4), 0);
pos += 4;
/* Read overlapping A and B */
BOOST_CHECK_EQUAL(fg.read(test, 128).bytes_read, 128);
BOOST_CHECK_EQUAL (memcmp(data + pos, test, 128), 0);
pos += 128;
/* Read overlapping B/C/D and over-reading by a lot */
BOOST_CHECK_EQUAL(fg.read(test, total_length * 3).bytes_read, total_length - pos);
BOOST_CHECK_EQUAL (memcmp(data + pos, test, total_length - pos), 0);
/* Over-read by a little */
BOOST_CHECK_EQUAL (fg.seek(0, SEEK_SET), 0);
BOOST_CHECK_EQUAL(fg.read(test, total_length).bytes_read, total_length);
BOOST_CHECK_EQUAL(fg.read(test, 1).bytes_read, 0);
/* Seeking off the end of the file should not give an error */
BOOST_CHECK_EQUAL (fg.seek(total_length * 2, SEEK_SET), total_length * 2);
/* and attempting to read should return nothing and EOF */
auto result = fg.read(test, 64);
BOOST_CHECK_EQUAL(result.bytes_read, 0);
BOOST_CHECK(result.eof);
/* but the requested seek should be remembered, so if we now go back (relatively) */
BOOST_CHECK_EQUAL (fg.seek(-total_length * 2, SEEK_CUR), 0);
/* we should be at the start again */
BOOST_CHECK_EQUAL(fg.read(test, 64).bytes_read, 64);
BOOST_CHECK_EQUAL (memcmp(data, test, 64), 0);
/* SEEK_SET */
BOOST_CHECK_EQUAL (fg.seek(999, SEEK_SET), 999);
BOOST_CHECK_EQUAL(fg.read(test, 64).bytes_read, 64);
BOOST_CHECK_EQUAL (memcmp(data + 999, test, 64), 0);
/* SEEK_CUR */
BOOST_CHECK_EQUAL (fg.seek(42, SEEK_CUR), 999 + 64 + 42);
BOOST_CHECK_EQUAL(fg.read(test, 64).bytes_read, 64);
BOOST_CHECK_EQUAL (memcmp(data + 999 + 64 + 42, test, 64), 0);
/* SEEK_END */
BOOST_CHECK_EQUAL (fg.seek(1077, SEEK_END), total_length - 1077);
BOOST_CHECK_EQUAL(fg.read(test, 256).bytes_read, 256);
BOOST_CHECK_EQUAL (memcmp(data + total_length - 1077, test, 256), 0);
}
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