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/**
* Tests that projecting a non-existent subfield behaves identically in both query and aggregation.
*/
(function() {
"use strict";
const coll = db.c;
coll.drop();
assert.commandWorked(coll.insert({a: [1]}));
assert.commandWorked(coll.insert({a: {c: 1}}));
assert.commandWorked(coll.insert({a: [{c: 1}, {b: 1, c: 1}, {c: 1}]}));
assert.commandWorked(coll.insert({a: 1}));
assert.commandWorked(coll.insert({b: 1}));
assert.eq(coll.aggregate([{$project: {'a.b': 1}}, {$sort: {_id: 1}}]).toArray(),
coll.find({}, {'a.b': 1}).sort({_id: 1}).toArray());
}());
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