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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/base/data_view.h"
#include <cstring>
#include "mongo/base/data_type_endian.h"
#include "mongo/platform/endian.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
TEST(DataView, ConstDataView) {
char buf[sizeof(uint32_t) * 3];
uint32_t native = 1234;
uint32_t le = endian::nativeToLittle(native);
uint32_t be = endian::nativeToBig(native);
std::memcpy(buf, &native, sizeof(uint32_t));
std::memcpy(buf + sizeof(uint32_t), &le, sizeof(uint32_t));
std::memcpy(buf + sizeof(uint32_t) * 2, &be, sizeof(uint32_t));
ConstDataView cdv(buf);
ASSERT_EQUALS(buf, cdv.view());
ASSERT_EQUALS(buf + 5, cdv.view(5));
ASSERT_EQUALS(native, cdv.read<uint32_t>());
ASSERT_EQUALS(native, cdv.read<LittleEndian<uint32_t>>(sizeof(uint32_t)));
ASSERT_EQUALS(native, cdv.read<BigEndian<uint32_t>>(sizeof(uint32_t) * 2));
}
TEST(DataView, DataView) {
char buf[sizeof(uint32_t) * 3];
uint32_t native = 1234;
DataView dv(buf);
dv.write(native);
dv.write(LittleEndian<uint32_t>(native), sizeof(uint32_t));
dv.write(BigEndian<uint32_t>(native), sizeof(uint32_t) * 2);
ASSERT_EQUALS(buf, dv.view());
ASSERT_EQUALS(buf + 5, dv.view(5));
ASSERT_EQUALS(native, dv.read<uint32_t>());
ASSERT_EQUALS(native, dv.read<LittleEndian<uint32_t>>(sizeof(uint32_t)));
ASSERT_EQUALS(native, dv.read<BigEndian<uint32_t>>(sizeof(uint32_t) * 2));
}
} // namespace mongo
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