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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/db/collection_index_usage_tracker.h"
#include "mongo/db/jsobj.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/clock_source_mock.h"
namespace mongo {
namespace {
class CollectionIndexUsageTrackerTest : public unittest::Test {
protected:
CollectionIndexUsageTrackerTest() : _tracker(&_clockSource) {}
/**
* Returns an unowned pointer to the tracker owned by this test fixture.
*/
CollectionIndexUsageTracker* getTracker() {
return &_tracker;
}
/**
* Returns an unowned pointer to the mock clock source owned by this test fixture.
*/
ClockSourceMock* getClockSource() {
return &_clockSource;
}
private:
ClockSourceMock _clockSource;
CollectionIndexUsageTracker _tracker;
};
// Test that a newly contructed tracker has an empty map.
TEST_F(CollectionIndexUsageTrackerTest, Empty) {
ASSERT(getTracker()->getUsageStats().empty());
}
// Test that recording of a single index hit is reflected in returned stats map.
TEST_F(CollectionIndexUsageTrackerTest, SingleHit) {
getTracker()->registerIndex("foo", BSON("foo" << 1));
getTracker()->recordIndexAccess("foo");
CollectionIndexUsageMap statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") != statsMap.end());
ASSERT_EQUALS(1, statsMap["foo"].accesses.loadRelaxed());
}
// Test that recording of multiple index hits are reflected in stats map.
TEST_F(CollectionIndexUsageTrackerTest, MultipleHit) {
getTracker()->registerIndex("foo", BSON("foo" << 1));
getTracker()->recordIndexAccess("foo");
getTracker()->recordIndexAccess("foo");
CollectionIndexUsageMap statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") != statsMap.end());
ASSERT_EQUALS(2, statsMap["foo"].accesses.loadRelaxed());
}
TEST_F(CollectionIndexUsageTrackerTest, IndexKey) {
getTracker()->registerIndex("foo", BSON("foo" << 1));
CollectionIndexUsageMap statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") != statsMap.end());
ASSERT_BSONOBJ_EQ(BSON("foo" << 1), statsMap["foo"].indexKey);
}
// Test that index registration generates an entry in the stats map.
TEST_F(CollectionIndexUsageTrackerTest, Register) {
getTracker()->registerIndex("foo", BSON("foo" << 1));
ASSERT_EQUALS(1U, getTracker()->getUsageStats().size());
getTracker()->registerIndex("bar", BSON("bar" << 1));
ASSERT_EQUALS(2U, getTracker()->getUsageStats().size());
}
// Test that index deregistration results in removal of an entry from the stats map.
TEST_F(CollectionIndexUsageTrackerTest, Deregister) {
getTracker()->registerIndex("foo", BSON("foo" << 1));
getTracker()->registerIndex("bar", BSON("bar" << 1));
ASSERT_EQUALS(2U, getTracker()->getUsageStats().size());
getTracker()->unregisterIndex("foo");
ASSERT_EQUALS(1U, getTracker()->getUsageStats().size());
getTracker()->unregisterIndex("bar");
ASSERT_EQUALS(0U, getTracker()->getUsageStats().size());
}
// Test that index deregistration results in reset of the usage counter.
TEST_F(CollectionIndexUsageTrackerTest, HitAfterDeregister) {
getTracker()->registerIndex("foo", BSON("foo" << 1));
getTracker()->recordIndexAccess("foo");
getTracker()->recordIndexAccess("foo");
CollectionIndexUsageMap statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") != statsMap.end());
ASSERT_EQUALS(2, statsMap["foo"].accesses.loadRelaxed());
getTracker()->unregisterIndex("foo");
statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") == statsMap.end());
getTracker()->registerIndex("foo", BSON("foo" << 1));
getTracker()->recordIndexAccess("foo");
statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") != statsMap.end());
ASSERT_EQUALS(1, statsMap["foo"].accesses.loadRelaxed());
}
// Test that index tracker start date/time is reset on index deregistration/registration.
TEST_F(CollectionIndexUsageTrackerTest, DateTimeAfterDeregister) {
getTracker()->registerIndex("foo", BSON("foo" << 1));
CollectionIndexUsageMap statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") != statsMap.end());
ASSERT_EQUALS(statsMap["foo"].trackerStartTime, getClockSource()->now());
getTracker()->unregisterIndex("foo");
statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") == statsMap.end());
// Increment clock source so that a new index registration has different start time.
getClockSource()->advance(Milliseconds(1));
getTracker()->registerIndex("foo", BSON("foo" << 1));
statsMap = getTracker()->getUsageStats();
ASSERT(statsMap.find("foo") != statsMap.end());
ASSERT_EQUALS(statsMap["foo"].trackerStartTime, getClockSource()->now());
}
} // namespace
} // namespace mongo
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