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// Basic testing to confirm that the $match stage handles $expr correctly.
(function() {
"use strict";
const coll = db.expr_match;
coll.drop();
assert.writeOK(coll.insert({x: 0}));
assert.writeOK(coll.insert({x: 1, y: 1}));
assert.writeOK(coll.insert({x: 2, y: 4}));
assert.writeOK(coll.insert({x: 3, y: 9}));
// $match with $expr representing local document field path reference.
assert.eq(1, coll.aggregate([{$match: {$expr: {$eq: ["$x", 2]}}}]).itcount());
assert.eq(1, coll.aggregate([{$match: {$expr: {$eq: ["$x", "$y"]}}}]).itcount());
assert.eq(3, coll.aggregate([{$match: {$expr: {$eq: ["$x", {$sqrt: "$y"}]}}}]).itcount());
// $match with $expr containing $or and $and.
assert.eq(
2,
coll.aggregate([{
$match: {
$expr:
{$or: [{$eq: ["$x", 3]}, {$and: [{$eq: ["$x", 2]}, {$eq: ["$y", 4]}]}]}
}
}])
.itcount());
// $match $expr containing $in.
assert.eq(3,
coll.aggregate([{$match: {$expr: {$in: ["$x", [1, {$mod: [4, 2]}, 3]]}}}]).itcount());
// $match with constant expression and field path.
assert.eq(1,
coll.aggregate([{$match: {$expr: {$gte: ["$y", {$multiply: [3, 3]}]}}}]).itcount());
// $match with constant expression and no field path.
assert.eq(4, coll.aggregate([{$match: {$expr: {$gte: [10, 5]}}}]).itcount());
assert.eq(0, coll.aggregate([{$match: {$expr: {$gte: [5, 10]}}}]).itcount());
})();
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