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/**
* Copyright (C) 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/db/query/parsed_projection.h"
#include <memory>
#include "mongo/db/json.h"
#include "mongo/db/matcher/expression_parser.h"
#include "mongo/unittest/unittest.h"
namespace {
using std::unique_ptr;
using std::string;
using std::vector;
using namespace mongo;
//
// creation function
//
unique_ptr<ParsedProjection> createParsedProjection(const BSONObj& query, const BSONObj& projObj) {
StatusWithMatchExpression swme = MatchExpressionParser::parse(query);
ASSERT(swme.isOK());
boost::scoped_ptr<MatchExpression> queryMatchExpr(swme.getValue());
ParsedProjection* out = NULL;
Status status = ParsedProjection::make(projObj, queryMatchExpr.get(), &out);
if (!status.isOK()) {
FAIL(mongoutils::str::stream() << "failed to parse projection " << projObj
<< " (query: " << query << "): " << status.toString());
}
ASSERT(out);
return unique_ptr<ParsedProjection>(out);
}
unique_ptr<ParsedProjection> createParsedProjection(const char* queryStr, const char* projStr) {
BSONObj query = fromjson(queryStr);
BSONObj projObj = fromjson(projStr);
return createParsedProjection(query, projObj);
}
//
// Failure to create a parsed projection is expected
//
void assertInvalidProjection(const char* queryStr, const char* projStr) {
BSONObj query = fromjson(queryStr);
BSONObj projObj = fromjson(projStr);
StatusWithMatchExpression swme = MatchExpressionParser::parse(query);
ASSERT(swme.isOK());
boost::scoped_ptr<MatchExpression> queryMatchExpr(swme.getValue());
ParsedProjection* out = NULL;
Status status = ParsedProjection::make(projObj, queryMatchExpr.get(), &out);
boost::scoped_ptr<ParsedProjection> destroy(out);
ASSERT(!status.isOK());
}
// canonical_query.cpp will invoke ParsedProjection::make only when
// the projection spec is non-empty. This test case is included for
// completeness and do not reflect actual usage.
TEST(ParsedProjectionTest, MakeId) {
unique_ptr<ParsedProjection> parsedProj(createParsedProjection("{}", "{}"));
ASSERT(parsedProj->requiresDocument());
}
TEST(ParsedProjectionTest, MakeEmpty) {
unique_ptr<ParsedProjection> parsedProj(createParsedProjection("{}", "{_id: 0}"));
ASSERT(parsedProj->requiresDocument());
}
TEST(ParsedProjectionTest, MakeSingleField) {
unique_ptr<ParsedProjection> parsedProj(createParsedProjection("{}", "{a: 1}"));
ASSERT(!parsedProj->requiresDocument());
const vector<string>& fields = parsedProj->getRequiredFields();
ASSERT_EQUALS(fields.size(), 2U);
ASSERT_EQUALS(fields[0], "_id");
ASSERT_EQUALS(fields[1], "a");
}
TEST(ParsedProjectionTest, MakeSingleFieldCovered) {
unique_ptr<ParsedProjection> parsedProj(createParsedProjection("{}", "{_id: 0, a: 1}"));
ASSERT(!parsedProj->requiresDocument());
const vector<string>& fields = parsedProj->getRequiredFields();
ASSERT_EQUALS(fields.size(), 1U);
ASSERT_EQUALS(fields[0], "a");
}
TEST(ParsedProjectionTest, MakeSingleFieldIDCovered) {
unique_ptr<ParsedProjection> parsedProj(createParsedProjection("{}", "{_id: 1}"));
ASSERT(!parsedProj->requiresDocument());
const vector<string>& fields = parsedProj->getRequiredFields();
ASSERT_EQUALS(fields.size(), 1U);
ASSERT_EQUALS(fields[0], "_id");
}
// boolean support is undocumented
TEST(ParsedProjectionTest, MakeSingleFieldCoveredBoolean) {
unique_ptr<ParsedProjection> parsedProj(createParsedProjection("{}", "{_id: 0, a: true}"));
ASSERT(!parsedProj->requiresDocument());
const vector<string>& fields = parsedProj->getRequiredFields();
ASSERT_EQUALS(fields.size(), 1U);
ASSERT_EQUALS(fields[0], "a");
}
// boolean support is undocumented
TEST(ParsedProjectionTest, MakeSingleFieldCoveredIdBoolean) {
unique_ptr<ParsedProjection> parsedProj(createParsedProjection("{}", "{_id: false, a: 1}"));
ASSERT(!parsedProj->requiresDocument());
const vector<string>& fields = parsedProj->getRequiredFields();
ASSERT_EQUALS(fields.size(), 1U);
ASSERT_EQUALS(fields[0], "a");
}
//
// Positional operator validation
//
TEST(ParsedProjectionTest, InvalidPositionalOperatorProjections) {
assertInvalidProjection("{}", "{'a.$': 1}");
assertInvalidProjection("{a: 1}", "{'b.$': 1}");
assertInvalidProjection("{a: 1}", "{'a.$': 0}");
assertInvalidProjection("{a: 1}", "{'a.$.d.$': 1}");
assertInvalidProjection("{a: 1}", "{'a.$.$': 1}");
assertInvalidProjection("{a: 1}", "{'a.$.$': 1}");
assertInvalidProjection("{a: 1, b: 1, c: 1}", "{'abc.$': 1}");
assertInvalidProjection("{$or: [{a: 1}, {$or: [{b: 1}, {c: 1}]}]}", "{'d.$': 1}");
assertInvalidProjection("{a: [1, 2, 3]}", "{'.$': 1}");
}
TEST(ParsedProjectionTest, ValidPositionalOperatorProjections) {
createParsedProjection("{a: 1}", "{'a.$': 1}");
createParsedProjection("{a: 1}", "{'a.foo.bar.$': 1}");
createParsedProjection("{a: 1}", "{'a.foo.bar.$.x.y': 1}");
createParsedProjection("{'a.b.c': 1}", "{'a.b.c.$': 1}");
createParsedProjection("{'a.b.c': 1}", "{'a.e.f.$': 1}");
createParsedProjection("{a: {b: 1}}", "{'a.$': 1}");
createParsedProjection("{a: 1, b: 1}}", "{'a.$': 1}");
createParsedProjection("{a: 1, b: 1}}", "{'b.$': 1}");
createParsedProjection("{$and: [{a: 1}, {b: 1}]}", "{'a.$': 1}");
createParsedProjection("{$and: [{a: 1}, {b: 1}]}", "{'b.$': 1}");
createParsedProjection("{$or: [{a: 1}, {b: 1}]}", "{'a.$': 1}");
createParsedProjection("{$or: [{a: 1}, {b: 1}]}", "{'b.$': 1}");
createParsedProjection("{$and: [{$or: [{a: 1}, {$and: [{b: 1}, {c: 1}]}]}]}",
"{'c.d.f.$': 1}");
// Fields with empty name can be projected using the positional $ operator.
createParsedProjection("{'': [1, 2, 3]}", "{'.$': 1}");
}
// Some match expressions (eg. $where) do not override MatchExpression::path()
// In this test case, we use an internal match expression implementation ALWAYS_FALSE
// to achieve the same effect.
// Projection parser should handle this the same way as an empty path.
TEST(ParsedProjectionTest, InvalidPositionalProjectionDefaultPathMatchExpression) {
unique_ptr<MatchExpression> queryMatchExpr(new FalseMatchExpression());
ASSERT(NULL == queryMatchExpr->path().rawData());
ParsedProjection* out = NULL;
BSONObj projObj = fromjson("{'a.$': 1}");
Status status = ParsedProjection::make(projObj, queryMatchExpr.get(), &out);
ASSERT(!status.isOK());
boost::scoped_ptr<ParsedProjection> destroy(out);
// Projecting onto empty field should fail.
BSONObj emptyFieldProjObj = fromjson("{'.$': 1}");
status = ParsedProjection::make(emptyFieldProjObj, queryMatchExpr.get(), &out);
ASSERT(!status.isOK());
}
//
// DBRef projections
//
TEST(ParsedProjectionTest, DBRefProjections) {
// non-dotted
createParsedProjection(BSONObj(), BSON( "$ref" << 1));
createParsedProjection(BSONObj(), BSON( "$id" << 1));
createParsedProjection(BSONObj(), BSON( "$ref" << 1));
// dotted before
createParsedProjection("{}", "{'a.$ref': 1}");
createParsedProjection("{}", "{'a.$id': 1}");
createParsedProjection("{}", "{'a.$db': 1}");
// dotted after
createParsedProjection("{}", "{'$id.a': 1}");
// position operator on $id
// $ref and $db hold the collection and database names respectively,
// so these fields cannot be arrays.
createParsedProjection("{'a.$id': {$elemMatch: {x: 1}}}", "{'a.$id.$': 1}");
}
} // unnamed namespace
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