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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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_range_cursor.h"
#include "mongo/base/data_type_endian.h"
#include "mongo/platform/endian.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
TEST(DataRangeCursor, ConstDataRangeCursor) {
char buf[14];
DataView(buf).write<uint16_t>(1);
DataView(buf).write<LittleEndian<uint32_t>>(2, sizeof(uint16_t));
DataView(buf).write<BigEndian<uint64_t>>(3, sizeof(uint16_t) + sizeof(uint32_t));
ConstDataRangeCursor cdrc(buf, buf + sizeof(buf));
ConstDataRangeCursor backup(cdrc);
ASSERT_EQUALS(static_cast<uint16_t>(1), cdrc.readAndAdvance<uint16_t>().getValue());
ASSERT_EQUALS(static_cast<uint32_t>(2),
cdrc.readAndAdvance<LittleEndian<uint32_t>>().getValue());
ASSERT_EQUALS(static_cast<uint64_t>(3),
cdrc.readAndAdvance<BigEndian<uint64_t>>().getValue());
ASSERT_EQUALS(false, cdrc.readAndAdvance<char>().isOK());
// test skip()
cdrc = backup;
ASSERT_EQUALS(true, cdrc.skip<uint32_t>().isOK());;
ASSERT_EQUALS(true, cdrc.advance(10).isOK());
ASSERT_EQUALS(false, cdrc.readAndAdvance<char>().isOK());
}
TEST(DataRangeCursor, ConstDataRangeCursorType) {
char buf[] = "foo";
ConstDataRangeCursor cdrc(buf, buf + sizeof(buf));
ConstDataRangeCursor out(nullptr, nullptr);
auto inner = cdrc.read(&out);
ASSERT_OK(inner);
ASSERT_EQUALS(buf, out.data());
}
TEST(DataRangeCursor, DataRangeCursor) {
char buf[100] = { 0 };
DataRangeCursor dc(buf, buf + 14);
ASSERT_EQUALS(true, dc.writeAndAdvance<uint16_t>(1).isOK());
ASSERT_EQUALS(true, dc.writeAndAdvance<LittleEndian<uint32_t>>(2).isOK());
ASSERT_EQUALS(true, dc.writeAndAdvance<BigEndian<uint64_t>>(3).isOK());
ASSERT_EQUALS(false, dc.writeAndAdvance<char>(1).isOK());
ConstDataRangeCursor cdrc(buf, buf + sizeof(buf));
ASSERT_EQUALS(static_cast<uint16_t>(1), cdrc.readAndAdvance<uint16_t>().getValue());
ASSERT_EQUALS(static_cast<uint32_t>(2),
cdrc.readAndAdvance<LittleEndian<uint32_t>>().getValue());
ASSERT_EQUALS(static_cast<uint64_t>(3),
cdrc.readAndAdvance<BigEndian<uint64_t>>().getValue());
ASSERT_EQUALS(static_cast<char>(0), cdrc.readAndAdvance<char>().getValue());
}
TEST(DataRangeCursor, DataRangeCursorType) {
char buf[] = "foo";
char buf2[] = "barZ";
DataRangeCursor drc(buf, buf + sizeof(buf) + -1);
DataRangeCursor out(nullptr, nullptr);
Status status = drc.read(&out);
ASSERT_OK(status);
ASSERT_EQUALS(buf, out.data());
drc = DataRangeCursor(buf2, buf2 + sizeof(buf2) + -1);
status = drc.write(out);
ASSERT_OK(status);
ASSERT_EQUALS(std::string("fooZ"), buf2);
}
} // namespace mongo
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