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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/mutable/mutable_bson_test_utils.h"
#include <algorithm>
#include <ostream>
#include <vector>
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/mutable/algorithm.h"
#include "mongo/bson/mutable/const_element.h"
#include "mongo/bson/mutable/document.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace mutablebson {
namespace {
inline void assertSameSign(int lhs, int rhs) {
if (lhs == 0) {
ASSERT_EQUALS(rhs, 0);
} else if (lhs < 0) {
ASSERT_LESS_THAN(rhs, 0);
} else {
ASSERT_GREATER_THAN(rhs, 0);
}
}
inline void assertOppositeSign(int lhs, int rhs) {
if (lhs == 0) {
ASSERT_EQUALS(rhs, 0);
} else if (lhs < 0) {
ASSERT_GREATER_THAN(rhs, 0);
} else {
ASSERT_LESS_THAN(rhs, 0);
}
}
void addChildrenToVector(ConstElement elt, std::vector<ConstElement>* accumulator) {
ConstElement current = elt.leftChild();
while (current.ok()) {
accumulator->push_back(current);
current = current.rightSibling();
}
}
bool checkDocNoOrderingImpl(ConstElement lhs, ConstElement rhs) {
const BSONType lhsType = lhs.getType();
const BSONType rhsType = rhs.getType();
if (lhsType == mongo::Object) {
if (rhsType != mongo::Object)
return false;
// For objects, sort the children by field name, then compare in that order.
std::vector<ConstElement> lhsChildren;
addChildrenToVector(lhs, &lhsChildren);
std::vector<ConstElement> rhsChildren;
addChildrenToVector(rhs, &rhsChildren);
if (lhsChildren.size() != rhsChildren.size())
return false;
// NOTE: if you have repeated field names, this is not necessarily going to
// work. This is unlikely to be a problem in practice, but we could write a
// more sophisticated comparator if we need to: perhaps one that ordered first
// by field name, then by type, then by woCompare. Performance isn't important
// here.
std::sort(lhsChildren.begin(), lhsChildren.end(), FieldNameLessThan());
std::sort(rhsChildren.begin(), rhsChildren.end(), FieldNameLessThan());
typedef std::vector<ConstElement>::const_iterator iter;
iter lhsWhere = lhsChildren.begin();
iter rhsWhere = rhsChildren.begin();
const iter lhsEnd = lhsChildren.end();
for (; lhsWhere != lhsEnd; ++lhsWhere, ++rhsWhere) {
if (lhsWhere->getFieldName() != rhsWhere->getFieldName())
return false;
if (!checkDocNoOrderingImpl(*lhsWhere, *rhsWhere))
return false;
}
return true;
} else if (lhsType == mongo::Array) {
if (rhsType != mongo::Array)
return false;
// For arrays, since they are ordered, we don't need the sorting step.
const size_t lhsChildren = countChildren(lhs);
const size_t rhsChildren = countChildren(rhs);
if (lhsChildren != rhsChildren)
return false;
if (lhsChildren == 0)
return true;
ConstElement lhsChild = lhs.leftChild();
ConstElement rhsChild = rhs.leftChild();
while (lhsChild.ok()) {
if (!checkDocNoOrderingImpl(lhsChild, rhsChild))
return false;
lhsChild = lhsChild.rightSibling();
rhsChild = rhsChild.rightSibling();
}
return true;
} else {
// This is some leaf type. We've already checked or ignored field names, so
// don't recheck it here.
return lhs.compareWithElement(rhs, nullptr, false) == 0;
}
}
} // namespace
// TODO: We should really update this to be an ASSERT_ something, so that we can print out
// the expected and actual documents.
bool checkDoc(const Document& lhs, const BSONObj& rhs) {
// Get the fundamental result via BSONObj's woCompare path. This is the best starting
// point, because we think that Document::getObject and the serialization mechanism is
// pretty well sorted.
BSONObj fromLhs = lhs.getObject();
const int primaryResult = fromLhs.woCompare(rhs);
// Validate primary result via other comparison paths.
const int secondaryResult = lhs.compareWithBSONObj(rhs, nullptr);
assertSameSign(primaryResult, secondaryResult);
// Check that mutables serialized result matches against its origin.
ASSERT_EQUALS(0, lhs.compareWithBSONObj(fromLhs, nullptr));
return (primaryResult == 0);
}
bool checkDoc(const Document& lhs, const Document& rhs) {
const int primaryResult = lhs.compareWith(rhs, nullptr);
const BSONObj fromLhs = lhs.getObject();
const BSONObj fromRhs = rhs.getObject();
const int result_d_o = lhs.compareWithBSONObj(fromRhs, nullptr);
const int result_o_d = rhs.compareWithBSONObj(fromLhs, nullptr);
assertSameSign(primaryResult, result_d_o);
assertOppositeSign(primaryResult, result_o_d);
ASSERT_EQUALS(0, lhs.compareWithBSONObj(fromLhs, nullptr));
ASSERT_EQUALS(0, rhs.compareWithBSONObj(fromRhs, nullptr));
return (primaryResult == 0);
}
std::ostream& operator<<(std::ostream& stream, const ConstElement& elt) {
stream << elt.toString();
return stream;
}
std::ostream& operator<<(std::ostream& stream, const Document& doc) {
stream << doc.toString();
return stream;
}
std::ostream& operator<<(std::ostream& stream, const Element& elt) {
stream << elt.toString();
return stream;
}
bool checkEqualNoOrdering(const Document& lhs, const Document& rhs) {
return checkDocNoOrderingImpl(lhs.root(), rhs.root());
}
std::ostream& operator<<(std::ostream& stream, const UnorderedWrapper_Doc& uw_d) {
return stream << uw_d.doc;
}
std::ostream& operator<<(std::ostream& stream, const UnorderedWrapper_Obj& uw_o) {
const Document d(uw_o.obj);
return stream << d;
}
} // namespace mutablebson
} // namespace mongo
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