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/**
* Copyright 2017 (c) 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/platform/basic.h"
#include "mongo/db/matcher/expression.h"
#include "mongo/db/matcher/schema/expression_internal_schema_min_length.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace {
TEST(InternalSchemaMinLengthMatchExpression, RejectsNonStringElements) {
InternalSchemaMinLengthMatchExpression minLength("a", 1);
ASSERT_FALSE(minLength.matchesBSON(BSON("a" << BSONObj())));
ASSERT_FALSE(minLength.matchesBSON(BSON("a" << 1)));
ASSERT_FALSE(minLength.matchesBSON(BSON("a" << BSON_ARRAY(1))));
}
TEST(InternalSchemaMinLengthMatchExpression, RejectsStringsWithTooFewChars) {
InternalSchemaMinLengthMatchExpression minLength("a", 2);
ASSERT_FALSE(minLength.matchesBSON(BSON("a"
<< "")));
ASSERT_FALSE(minLength.matchesBSON(BSON("a"
<< "a")));
}
TEST(InternalSchemaMinLengthMatchExpression, AcceptsStringWithAtLeastMinChars) {
InternalSchemaMinLengthMatchExpression minLength("a", 2);
ASSERT_TRUE(minLength.matchesBSON(BSON("a"
<< "ab")));
ASSERT_TRUE(minLength.matchesBSON(BSON("a"
<< "abc")));
ASSERT_TRUE(minLength.matchesBSON(BSON("a"
<< "abcde")));
}
TEST(InternalSchemaMinLengthMatchExpression, MinLengthZeroAllowsEmptyString) {
InternalSchemaMinLengthMatchExpression minLength("a", 0);
ASSERT_TRUE(minLength.matchesBSON(BSON("a"
<< "")));
}
TEST(InternalSchemaMinLengthMatchExpression, RejectsNull) {
InternalSchemaMinLengthMatchExpression minLength("a", 1);
ASSERT_FALSE(minLength.matchesBSON(BSON("a" << BSONNULL)));
}
TEST(InternalSchemaMinLengthMatchExpression, TreatsMultiByteCodepointAsOneCharacter) {
InternalSchemaMinLengthMatchExpression matchingMinLength("a", 1);
InternalSchemaMinLengthMatchExpression nonMatchingMinLength("a", 2);
// This string has one code point, so it should meet minimum length 1 but not minimum length 2.
constexpr auto testString = u8"\U0001f4a9";
ASSERT_TRUE(matchingMinLength.matchesBSON(BSON("a" << testString)));
ASSERT_FALSE(nonMatchingMinLength.matchesBSON(BSON("a" << testString)));
}
TEST(InternalSchemaMinLengthMatchExpression, CorectlyCountsUnicodeCodepoints) {
InternalSchemaMinLengthMatchExpression matchingMinLength("a", 5);
InternalSchemaMinLengthMatchExpression nonMatchingMinLength("a", 6);
// A test string that contains single-byte, 2-byte, 3-byte, and 4-byte code points.
constexpr auto testString =
u8":" // Single-byte character
u8"\u00e9" // 2-byte character
u8")" // Single-byte character
u8"\U0001f4a9" // 4-byte character
u8"\U000020ac"; // 3-byte character
// This string has five code points, so it should meet minimum length 5 but not minimum
// length 6.
ASSERT_TRUE(matchingMinLength.matchesBSON(BSON("a" << testString)));
ASSERT_FALSE(nonMatchingMinLength.matchesBSON(BSON("a" << testString)));
}
TEST(InternalSchemaMinLengthMatchExpression, DealsWithInvalidUTF8) {
InternalSchemaMinLengthMatchExpression minLength("a", 1);
// Several kinds of invalid byte sequences listed in the Wikipedia article about UTF-8:
// https://en.wikipedia.org/wiki/UTF-8
constexpr auto testStringUnexpectedContinuationByte = "\bf";
constexpr auto testStringOverlongEncoding = "\xf0\x82\x82\xac";
constexpr auto testStringInvalidCodePoint = "\xed\xa0\x80"; // U+d800 is not allowed
constexpr auto testStringLeadingByteWithoutContinuationByte = "\xdf";
// Because these inputs are invalid, we don't have any expectations about the answers we get.
// Our only requirement is that the test does not crash.
std::ignore = minLength.matchesBSON(BSON("a" << testStringUnexpectedContinuationByte));
std::ignore = minLength.matchesBSON(BSON("a" << testStringOverlongEncoding));
std::ignore = minLength.matchesBSON(BSON("a" << testStringInvalidCodePoint));
std::ignore = minLength.matchesBSON(BSON("a" << testStringLeadingByteWithoutContinuationByte));
}
TEST(InternalSchemaMinLengthMatchExpression, NestedFieldsWorkWithDottedPaths) {
InternalSchemaMinLengthMatchExpression minLength("a.b", 2);
ASSERT_TRUE(minLength.matchesBSON(BSON("a" << BSON("b"
<< "ab"))));
ASSERT_TRUE(minLength.matchesBSON(BSON("a" << BSON("b"
<< "abc"))));
ASSERT_FALSE(minLength.matchesBSON(BSON("a" << BSON("b"
<< "a"))));
}
TEST(InternalSchemaMinLengthMatchExpression, SameMinLengthTreatedEquivalent) {
InternalSchemaMinLengthMatchExpression minLength1("a", 2);
InternalSchemaMinLengthMatchExpression minLength2("a", 2);
InternalSchemaMinLengthMatchExpression minLength3("a", 3);
ASSERT_TRUE(minLength1.equivalent(&minLength2));
ASSERT_FALSE(minLength1.equivalent(&minLength3));
}
} // namespace
} // namespace mongo
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