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(function() {
"use strict";
// In SERVER-63012, translation of $add expression into sbe now defaults the translation of $add
// with no operands to a zero integer constant.
const coll = db.add_coll;
coll.drop();
assert.commandWorked(coll.insert({x: 1}));
let result = coll.aggregate([{$project: {y: {$add: []}}}]).toArray();
assert.eq(result[0]["y"], 0);
// Confirm that we're not using DoubleDoubleSummation for $add expression with a set of double
// values.
let arr = [
1.4831356930199802e-05, -3.121724665346865, 3041897608700.073, 1001318343149.7166,
-1714.6229586696593, 1731390114894580.8, 6.256645803154374e-08, -107144114533844.25,
-0.08839485091750919, -265119153.02185738, -0.02450615965231944, 0.0002684331017079073,
32079040427.68358, -0.04733295911845742, 0.061381859083076085, -25329.59126796951,
-0.0009567520620034965, -1553879364344.9932, -2.1101077525869814e-08, -298421079729.5547,
0.03182394834273594, 22.201944843278916, -33.35667991109125, 11496013.960449915,
-40652595.33210472, 3.8496066090328163, 2.5074042398147304e-08, -0.02208724071782122,
-134211.37290639878, 0.17640433666616578, 4.463787499171126, 9.959669945399718,
129265976.35224283, 1.5865526187526546e-07, -4746011.710555799, -712048598925.0789,
582214206210.4034, 0.025236204812875362, 530078170.91147506, -14.865307666195053,
1.6727994895185032e-05, -113386276.03121366, -6.135827207137054, 10644945799901.145,
-100848907797.1582, 2.2404406961625282e-08, 1.315662618424494e-09, -0.832190208349044,
-9.779323414999364, -546522170658.2997
];
let doc = {_id: 0};
let i = 0;
let queryArr = [];
arr.forEach(num => {
i++;
doc[`f_${i}`] = num;
queryArr.push(`$f_${i}`);
});
assert.eq(true, coll.drop());
assert.commandWorked(coll.insert(doc));
let addResult = coll.aggregate([{$project: {add: {$add: queryArr}}}]).toArray();
let sumResult = coll.aggregate([{$project: {sum: {$sum: queryArr}}}]).toArray();
assert.neq(addResult[0]["add"], sumResult[0]["sum"]);
assert.eq(addResult[0]["add"], arr.reduce((a, b) => a + b));
}());
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