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/**
* Copyright (C) 2021-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/bson/bsonmisc.h"
#include "mongo/db/exec/document_value/document_value_test_util.h"
#include "mongo/db/pipeline/aggregation_context_fixture.h"
#include "mongo/db/pipeline/partition_key_comparator.h"
#include "mongo/unittest/death_test.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace {
class PartitionKeyComparatorTest : public AggregationContextFixture {
public:
void makeWithDefaultExpression(Document doc) {
boost::intrusive_ptr<ExpressionFieldPath> expr =
ExpressionFieldPath::parse(getExpCtx().get(), "$a", getExpCtx()->variablesParseState);
_keyComparator = std::make_unique<PartitionKeyComparator>(getExpCtx().get(), expr, doc);
}
protected:
std::unique_ptr<PartitionKeyComparator> _keyComparator = nullptr;
};
TEST_F(PartitionKeyComparatorTest, DetectsPartitionChangeBetweenDocuments) {
Document docOne{{"a", 1}};
makeWithDefaultExpression(docOne);
Document docTwo{{"a", 2}};
ASSERT_TRUE(_keyComparator->isDocumentNewPartition(docTwo));
}
TEST_F(PartitionKeyComparatorTest, DetectsPartitionChangeAfterMultipleDocuments) {
Document docOne{{"a", 1}, {"b", 1}};
makeWithDefaultExpression(docOne);
Document docTwo{{"a", 1}, {"b", 2}};
Document docThree{{"a", 1}, {"b", 3}};
Document docFour{{"a", 2}, {"b", 1}};
ASSERT_FALSE(_keyComparator->isDocumentNewPartition(docTwo));
ASSERT_FALSE(_keyComparator->isDocumentNewPartition(docThree));
ASSERT_TRUE(_keyComparator->isDocumentNewPartition(docFour));
}
TEST_F(PartitionKeyComparatorTest, ReportsMemoryCorrectly) {
Document docOne{{"a", 1}, {"b", 1}};
makeWithDefaultExpression(docOne);
ASSERT_EQ(_keyComparator->getApproximateSize(), docOne["a"].getApproximateSize());
Document docTwo{{"a", std::string("seventeen")}, {"b", 2}};
ASSERT_TRUE(_keyComparator->isDocumentNewPartition(docTwo));
ASSERT_EQ(_keyComparator->getApproximateSize(), docTwo["a"].getApproximateSize());
}
TEST_F(PartitionKeyComparatorTest, NullAndMissingCompareEqual) {
Document docOne{{"a", BSONNULL}};
makeWithDefaultExpression(docOne);
Document docTwo{{"b", 5}};
Document docThree{{"a", BSONNULL}};
Document docFour{{"a", 3}};
ASSERT_FALSE(_keyComparator->isDocumentNewPartition(docTwo));
ASSERT_FALSE(_keyComparator->isDocumentNewPartition(docThree));
ASSERT_TRUE(_keyComparator->isDocumentNewPartition(docFour));
}
DEATH_TEST_F(PartitionKeyComparatorTest,
FailsWithNullExpressionContext,
"Null expression context") {
boost::intrusive_ptr<ExpressionFieldPath> expr =
ExpressionFieldPath::parse(getExpCtx().get(), "$a", getExpCtx()->variablesParseState);
ASSERT_THROWS_CODE(_keyComparator =
std::make_unique<PartitionKeyComparator>(nullptr, expr, Document{{}}),
AssertionException,
5733800);
}
DEATH_TEST_F(PartitionKeyComparatorTest, FailsWithNullExpression, "Null expression passed") {
ASSERT_THROWS_CODE(_keyComparator = std::make_unique<PartitionKeyComparator>(
getExpCtx().get(), nullptr, Document{{}}),
AssertionException,
5733801);
}
} // namespace
} // namespace mongo
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