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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/platform/basic.h"
#include "mongo/bson/json.h"
#include "mongo/db/query/cursor_response.h"
#include "mongo/db/service_context_test_fixture.h"
#include "mongo/s/concurrency/locker_mongos_client_observer.h"
#include "mongo/s/query/cluster_cursor_manager.h"
#include "mongo/s/query/store_possible_cursor.h"
#include "mongo/util/clock_source_mock.h"
#include "mongo/util/net/hostandport.h"
namespace mongo {
namespace {
const NamespaceString nss = NamespaceString::createNamespaceString_forTest("test.collection");
const HostAndPort hostAndPort("testhost", 27017);
const ShardId shardId("testshard");
class StorePossibleCursorTest : public ServiceContextTest {
protected:
StorePossibleCursorTest() : _manager(&_clockSourceMock) {
auto service = getServiceContext();
service->registerClientObserver(std::make_unique<LockerMongosClientObserver>());
_opCtx = makeOperationContext();
}
OperationContext* opCtx() const {
return _opCtx.get();
}
ClusterCursorManager* getManager() {
return &_manager;
}
private:
ServiceContext::UniqueOperationContext _opCtx;
ClockSourceMock _clockSourceMock;
ClusterCursorManager _manager;
};
// Test that storePossibleCursor() returns a valid cursor response document.
TEST_F(StorePossibleCursorTest, ReturnsValidCursorResponse) {
std::vector<BSONObj> batch = {fromjson("{_id: 1}"), fromjson("{_id: 2}")};
CursorResponse cursorResponse(nss, CursorId(0), batch);
auto outgoingCursorResponse =
storePossibleCursor(opCtx(),
shardId,
hostAndPort,
cursorResponse.toBSON(CursorResponse::ResponseType::InitialResponse),
nss,
nullptr, // TaskExecutor
getManager(),
PrivilegeVector());
ASSERT_OK(outgoingCursorResponse.getStatus());
auto parsedOutgoingResponse = CursorResponse::parseFromBSON(outgoingCursorResponse.getValue());
ASSERT_OK(parsedOutgoingResponse.getStatus());
ASSERT_EQ(nss.toString(), parsedOutgoingResponse.getValue().getNSS().toString());
ASSERT_EQ(0U, parsedOutgoingResponse.getValue().getCursorId());
ASSERT_EQ(2U, parsedOutgoingResponse.getValue().getBatch().size());
ASSERT_BSONOBJ_EQ(fromjson("{_id: 1}"), parsedOutgoingResponse.getValue().getBatch()[0]);
ASSERT_BSONOBJ_EQ(fromjson("{_id: 2}"), parsedOutgoingResponse.getValue().getBatch()[1]);
}
// Test that storePossibleCursor() propagates an error if it cannot parse the cursor response.
TEST_F(StorePossibleCursorTest, FailsGracefullyOnBadCursorResponseDocument) {
auto outgoingCursorResponse = storePossibleCursor(opCtx(),
shardId,
hostAndPort,
fromjson("{ok: 1, cursor: {}}"),
nss,
nullptr, // TaskExecutor
getManager(),
PrivilegeVector());
ASSERT_NOT_OK(outgoingCursorResponse.getStatus());
ASSERT_EQ(ErrorCodes::TypeMismatch, outgoingCursorResponse.getStatus());
}
// Test that storePossibleCursor() passes up the command response if it is not recognized as a
// cursor response.
TEST_F(StorePossibleCursorTest, PassesUpCommandResultIfItDoesNotDescribeACursor) {
BSONObj notACursorObj = BSON("not"
<< "cursor");
auto outgoingCursorResponse = storePossibleCursor(opCtx(),
shardId,
hostAndPort,
notACursorObj,
nss,
nullptr, // TaskExecutor
getManager(),
PrivilegeVector());
ASSERT_OK(outgoingCursorResponse.getStatus());
ASSERT_BSONOBJ_EQ(notACursorObj, outgoingCursorResponse.getValue());
}
} // namespace
} // namespace mongo
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