path: root/src/mongo/bson/bsonelement_test.cpp

/**
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 *
 *    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.
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 *    along with this program. If not, see
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 *    code of portions of this program with the OpenSSL library under certain
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#include "mongo/platform/basic.h"

#include "mongo/bson/bsonelement.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/uuid.h"

namespace mongo {
namespace {

TEST(BSONElement, BinDataToString) {
    BSONObjBuilder builder;
    unsigned char bintype0[] = {0xDE, 0xEA, 0xBE, 0xEF, 0x01};  // Random BinData shorter than UUID

    const UUID validUUID = UUID::gen();
    unsigned char zeroUUID[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
    unsigned char overlongUUID[] = {0xBF,
                                    0xF7,
                                    0x1F,
                                    0x75,
                                    0x04,
                                    0x67,
                                    0x45,
                                    0xA4,
                                    0x9A,
                                    0x06,
                                    0xE9,
                                    0xBB,
                                    0x02,
                                    0x72,
                                    0x81,
                                    0x64,
                                    0xff};  // Valid RFC4122v4 UUID, but with extra byte added.
    unsigned char zeroLength[1] = {0};      // Not truly zero because Windows doesn't support that.
    StringData unknownType = "binary data\000with an unknown type"_sd;  // No terminating zero
    const BinDataType unknownBinDataType = BinDataType(42);
    builder.appendBinData("bintype0", sizeof(bintype0), BinDataGeneral, bintype0);
    validUUID.appendToBuilder(&builder, "validUUID");
    builder.appendBinData("zeroUUID", sizeof(zeroUUID), newUUID, zeroUUID);
    builder.appendBinData("overlongUUID", sizeof(overlongUUID), newUUID, overlongUUID);
    builder.appendBinData("zeroLength", 0, BinDataGeneral, zeroLength);
    builder.appendBinData(
        "unknownType", unknownType.size(), unknownBinDataType, unknownType.rawData());

    BSONObj obj = builder.obj();
    ASSERT_EQ(obj["bintype0"].toString(), "bintype0: BinData(0, DEEABEEF01)");
    ASSERT_EQ(obj["validUUID"].toString(), "validUUID: UUID(\"" + validUUID.toString() + "\")");
    ASSERT_EQ(obj["zeroUUID"].toString(),
              "zeroUUID: UUID(\"00000000-0000-0000-0000-000000000000\")");
    ASSERT_EQ(obj["overlongUUID"].toString(),
              "overlongUUID: BinData(4, BFF71F75046745A49A06E9BB02728164FF)");
    ASSERT_EQ(obj["zeroLength"].toString(), "zeroLength: BinData(0, )");
    ASSERT_EQ(obj["unknownType"].toString(),
              "unknownType: BinData(42, "
              "62696E6172792064617461007769746820616E20756E6B6E6F776E2074797065)");
}


TEST(BSONElement, TimestampToString) {

    // Testing default BSONObj Timestamp method, which constructs an empty Timestamp
    const BSONElement b;
    auto ts = b.timestamp();
    ASSERT_EQ(ts.toString(), "Timestamp(0, 0)");

    BSONObjBuilder builder;
    builder.append("ts0", Timestamp(Seconds(100), 1U));
    builder.append("ts1", Timestamp(Seconds(50000), 25));
    builder.append("ts2", Timestamp(Seconds(100000), 1U));
    // Testing max allowable integer values
    builder.append("ts3", Timestamp::max());

    // Testing for correct format when printing BSONObj Timestamps
    // using .toString(includeFieldName = false, full = false)
    BSONObj obj = builder.obj();
    ASSERT_EQ(obj["ts0"].toString(false, false), "Timestamp(100, 1)");
    ASSERT_EQ(obj["ts1"].toString(false, false), "Timestamp(50000, 25)");
    ASSERT_EQ(obj["ts2"].toString(false, false), "Timestamp(100000, 1)");
    ASSERT_EQ(obj["ts3"].toString(false, false), "Timestamp(4294967295, 4294967295)");
}

TEST(BSONElement, ExtractLargeSubObject) {
    std::int32_t size = 17 * 1024 * 1024;
    std::vector<char> buffer(size);
    DataRange bufferRange(&buffer.front(), &buffer.back());
    ASSERT_OK(bufferRange.writeNoThrow(LittleEndian<int32_t>(size)));

    BSONObj obj(buffer.data(), BSONObj::LargeSizeTrait{});

    BSONObjBuilder bigObjectBuilder;
    bigObjectBuilder.append("a", obj);
    BSONObj bigObj = bigObjectBuilder.obj<BSONObj::LargeSizeTrait>();

    BSONElement element = bigObj["a"];
    ASSERT_EQ(BSONType::Object, element.type());

    BSONObj subObj = element.Obj();
}

TEST(BSONElement, SafeNumberLongPositiveBound) {
    BSONObj obj =
        BSON("kLongLongMaxPlusOneAsDouble"
             << BSONElement::kLongLongMaxPlusOneAsDouble << "towardsZero"
             << std::nextafter(BSONElement::kLongLongMaxPlusOneAsDouble, 0.0) << "towardsInfinity"
             << std::nextafter(BSONElement::kLongLongMaxPlusOneAsDouble,
                               std::numeric_limits<double>::max())
             << "positiveInfinity" << std::numeric_limits<double>::infinity());

    // kLongLongMaxPlusOneAsDouble is the least double value that will overflow a 64-bit signed
    // two's-complement integer. Historically, converting this value with safeNumberLong() would
    // return the result of casting to double with a C-style cast. That operation is undefined
    // because of the overflow, but on most platforms we support, it returned the min 64-bit value
    // (-2^63). The safeNumberLongForHash() function should preserve that behavior indefinitely for
    // compatibility with on-disk data.
    ASSERT_EQ(obj["kLongLongMaxPlusOneAsDouble"].safeNumberLongForHash(),
              std::numeric_limits<long long>::lowest());

    // The safeNumberLong() function clamps kLongLongMaxPlusOneAsDouble to the max 64-bit value
    // (2^63 - 1).
    ASSERT_EQ(obj["kLongLongMaxPlusOneAsDouble"].safeNumberLong(),
              std::numeric_limits<long long>::max());

    // One quantum below kLongLongMaxPlusOneAsDouble is the largest double that safely converts to a
    // 64-bit signed two-s complement integer. Both safeNumberLong() and safeNumberLongForHash()
    // convert this using a C or C-style cast, an operation with defined behavior. This conversion
    // is exact.
    ASSERT_EQ(obj["towardsZero"].safeNumberLongForHash(), 0x7ffffffffffffc00ll);
    ASSERT_EQ(obj["towardsZero"].safeNumberLong(), 0x7ffffffffffffc00ll);

    // One quantum above kLongLongMaxPlusOneAsDouble is another number that that is too large to
    // convert. The safeNumberLong() function has always clamped this value to the max 64-bit value
    // (2^63 - 1), and that should continue to be the behavior for both safeNumberLong() and
    // safeNumberLongForHash().
    ASSERT_EQ(obj["towardsInfinity"].safeNumberLongForHash(),
              std::numeric_limits<long long>::max());
    ASSERT_EQ(obj["towardsInfinity"].safeNumberLong(), std::numeric_limits<long long>::max());

    // Both safeNumberLong() and safeNumberLongForHash() also clamp positive infinity to the max
    // 64-bit value (2^63 - 1).
    ASSERT_EQ(obj["positiveInfinity"].safeNumberLongForHash(),
              std::numeric_limits<long long>::max());
    ASSERT_EQ(obj["positiveInfinity"].safeNumberLong(), std::numeric_limits<long long>::max());
}

TEST(BSONElement, SafeNumberLongNegativeBound) {
    // Unlike the max long long value, the least long long value (-2^63) converts exactly to a
    // double value and can safely be used as a bound to check which double values are in the range
    // of long long.
    const double lowestLongLongAsDouble =
        static_cast<double>(std::numeric_limits<long long>::lowest());
    BSONObj obj =
        BSON("lowestLongLongAsDouble"  // This comment forces clang-format to break here.
             << lowestLongLongAsDouble << "towardsZero"
             << std::nextafter(lowestLongLongAsDouble, 0.0) << "towardsNegativeInfinity"
             << std::nextafter(lowestLongLongAsDouble, std::numeric_limits<double>::lowest())
             << "negativeInfinity" << -std::numeric_limits<double>::infinity());

    ASSERT_EQ(obj["lowestLongLongAsDouble"].safeNumberLongForHash(),
              std::numeric_limits<long long>::lowest());
    ASSERT_EQ(obj["lowestLongLongAsDouble"].safeNumberLong(),
              std::numeric_limits<long long>::lowest());

    ASSERT_EQ(obj["towardsZero"].safeNumberLongForHash(), -0x7ffffffffffffc00);
    ASSERT_EQ(obj["towardsZero"].safeNumberLong(), -0x7ffffffffffffc00);

    ASSERT_EQ(obj["towardsNegativeInfinity"].safeNumberLongForHash(),
              std::numeric_limits<long long>::lowest());
    ASSERT_EQ(obj["towardsNegativeInfinity"].safeNumberLong(),
              std::numeric_limits<long long>::lowest());

    ASSERT_EQ(obj["negativeInfinity"].safeNumberLongForHash(),
              std::numeric_limits<long long>::lowest());
    ASSERT_EQ(obj["negativeInfinity"].safeNumberLong(), std::numeric_limits<long long>::lowest());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongRejectsNegative) {
    BSONObj query = BSON("" << -2LL);
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToNonNegativeLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongAcceptsNegative) {
    BSONObj query = BSON("" << -2LL);
    auto result = query.firstElement().parseIntegerElementToLong();
    ASSERT_OK(result.getStatus());
    ASSERT_EQ(-2LL, result.getValue());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongRejectsTooLargeDouble) {
    BSONObj query = BSON("" << BSONElement::kLongLongMaxPlusOneAsDouble);
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToNonNegativeLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongRejectsTooLargeDouble) {
    BSONObj query = BSON("" << BSONElement::kLongLongMaxPlusOneAsDouble);
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongRejectsTooLargeNegativeDouble) {
    BSONObj query = BSON("" << std::numeric_limits<double>::min());
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongRejectsString) {
    BSONObj query = BSON(""
                         << "1");
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToNonNegativeLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongRejectsString) {
    BSONObj query = BSON(""
                         << "1");
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongRejectsNonIntegralDouble) {
    BSONObj query = BSON("" << 2.5);
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToNonNegativeLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongRejectsNonIntegralDouble) {
    BSONObj query = BSON("" << 2.5);
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongRejectsNonIntegralDecimal) {
    BSONObj query = BSON("" << Decimal128("2.5"));
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToNonNegativeLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongRejectsNonIntegralDecimal) {
    BSONObj query = BSON("" << Decimal128("2.5"));
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongRejectsLargestDecimal) {
    BSONObj query = BSON("" << Decimal128(Decimal128::kLargestPositive));
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToNonNegativeLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongRejectsLargestDecimal) {
    BSONObj query = BSON("" << Decimal128(Decimal128::kLargestPositive));
    ASSERT_NOT_OK(query.firstElement().parseIntegerElementToLong());
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongAcceptsZero) {
    BSONObj query = BSON("" << 0);
    auto result = query.firstElement().parseIntegerElementToNonNegativeLong();
    ASSERT_OK(result.getStatus());
    ASSERT_EQ(result.getValue(), 0LL);
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongAcceptsZero) {
    BSONObj query = BSON("" << 0);
    auto result = query.firstElement().parseIntegerElementToLong();
    ASSERT_OK(result.getStatus());
    ASSERT_EQ(result.getValue(), 0LL);
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToNonNegativeLongAcceptsThree) {
    BSONObj query = BSON("" << 3.0);
    auto result = query.firstElement().parseIntegerElementToNonNegativeLong();
    ASSERT_OK(result.getStatus());
    ASSERT_EQ(result.getValue(), 3LL);
}

TEST(BSONElementIntegerParseTest, ParseIntegerElementToLongAcceptsThree) {
    BSONObj query = BSON("" << 3.0);
    auto result = query.firstElement().parseIntegerElementToLong();
    ASSERT_OK(result.getStatus());
    ASSERT_EQ(result.getValue(), 3LL);
}

}  // namespace
}  // namespace mongo