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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 or 3 as
* published by the Free Software Foundation.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mir/anonymous_shm_file.h"
#include <gtest/gtest.h>
TEST(AnonymousShmFile, is_created)
{
size_t const file_size{100};
mir::AnonymousShmFile shm_file{file_size};
EXPECT_GE(shm_file.fd(), 0);
}
TEST(AnonymousShmFile, has_correct_size)
{
size_t const file_size{100};
mir::AnonymousShmFile shm_file{file_size};
struct stat stat;
fstat(shm_file.fd(), &stat);
EXPECT_EQ(static_cast<off_t>(file_size), stat.st_size);
}
TEST(AnonymousShmFile, writing_to_base_ptr_writes_to_file)
{
size_t const file_size{100};
mir::AnonymousShmFile shm_file{file_size};
auto base_ptr = reinterpret_cast<uint8_t*>(shm_file.base_ptr());
for (size_t i = 0; i < file_size; i++)
{
base_ptr[i] = i;
}
std::vector<unsigned char> buffer(file_size);
EXPECT_EQ(static_cast<ssize_t>(file_size),
read(shm_file.fd(), buffer.data(), file_size));
for (size_t i = 0; i < file_size; i++)
{
EXPECT_EQ(base_ptr[i], buffer[i]) << "i=" << i;
}
}
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