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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.
*/
//
// This file contains tests for mongo/db/exec/queued_data_stage.cpp
//
#include "mongo/db/exec/queued_data_stage.h"
#include <boost/optional.hpp>
#include <memory>
#include "mongo/db/exec/working_set.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context_d_test_fixture.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/clock_source_mock.h"
using namespace mongo;
namespace {
using std::unique_ptr;
class QueuedDataStageTest : public ServiceContextMongoDTest {
public:
QueuedDataStageTest() {
getServiceContext()->setFastClockSource(std::make_unique<ClockSourceMock>());
_opCtx = makeOperationContext();
}
protected:
OperationContext* getOpCtx() {
return _opCtx.get();
}
private:
ServiceContext::UniqueOperationContext _opCtx;
};
//
// Basic test that we get out valid stats objects.
//
TEST_F(QueuedDataStageTest, getValidStats) {
WorkingSet ws;
auto mock = std::make_unique<QueuedDataStage>(getOpCtx(), &ws);
const CommonStats* commonStats = mock->getCommonStats();
ASSERT_EQUALS(commonStats->works, static_cast<size_t>(0));
const SpecificStats* specificStats = mock->getSpecificStats();
ASSERT(specificStats);
unique_ptr<PlanStageStats> allStats(mock->getStats());
ASSERT_EQUALS(allStats->stageType, mock->stageType());
}
//
// Test that our stats are updated as we perform operations.
//
TEST_F(QueuedDataStageTest, validateStats) {
WorkingSet ws;
WorkingSetID wsID;
auto mock = std::make_unique<QueuedDataStage>(getOpCtx(), &ws);
// make sure that we're at all zero
const CommonStats* stats = mock->getCommonStats();
ASSERT_EQUALS(stats->yields, 0U);
ASSERT_EQUALS(stats->unyields, 0U);
ASSERT_EQUALS(stats->works, 0U);
ASSERT_EQUALS(stats->needTime, 0U);
ASSERT_EQUALS(stats->advanced, 0U);
ASSERT_FALSE(stats->isEOF);
// 'perform' some operations, validate stats
// needTime
mock->pushBack(PlanStage::NEED_TIME);
mock->work(&wsID);
ASSERT_EQUALS(stats->works, 1U);
ASSERT_EQUALS(stats->needTime, 1U);
// advanced, with pushed data
WorkingSetID id = ws.allocate();
mock->pushBack(id);
mock->work(&wsID);
ASSERT_EQUALS(stats->works, 2U);
ASSERT_EQUALS(stats->advanced, 1U);
// yields
mock->saveState();
ASSERT_EQUALS(stats->yields, 1U);
// unyields
mock->restoreState();
ASSERT_EQUALS(stats->unyields, 1U);
// and now we are d1U, but must trigger EOF with getStats()
ASSERT_FALSE(stats->isEOF);
unique_ptr<PlanStageStats> allStats(mock->getStats());
ASSERT_TRUE(stats->isEOF);
}
} // namespace
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