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// Cannot implicitly shard accessed collections because of collection existing when none expected.
// @tags: [assumes_no_implicit_collection_creation_after_drop]
// Test that the $match stage respects the collation.
(function() {
"use strict";
var caseInsensitive = {collation: {locale: "en_US", strength: 2}};
var coll = db.collation_match;
coll.drop();
assert.writeOK(coll.insert({a: "a"}));
// Test that the $match respects an explicit collation when it can be pushed down into the query
// layer.
assert.eq(1, coll.aggregate([{$match: {a: "A"}}], caseInsensitive).itcount());
// Test that the $match respects an explicit collation when it cannot be pushed down into the
// query layer.
assert.eq(
1, coll.aggregate([{$project: {b: "B"}}, {$match: {b: "b"}}], caseInsensitive).itcount());
// Test that $match inside a $facet respects the collation.
assert.eq(1,
coll.aggregate([{$facet: {fct: [{$match: {a: "A"}}]}}], caseInsensitive)
.toArray()[0]
.fct.length);
// Test that when a $match can be split to be part before the $unwind and part after, both
// pieces of the split respect the collation.
coll.drop();
assert.writeOK(coll.insert({a: "foo", b: ["bar"]}));
assert.eq(1,
coll.aggregate([{$limit: 1}, {$unwind: "$b"}, {$match: {a: "FOO", b: "BAR"}}],
caseInsensitive)
.itcount());
coll.drop();
assert.commandWorked(db.createCollection(coll.getName(), caseInsensitive));
assert.writeOK(coll.insert({a: "a"}));
// Test that the $match respects the inherited collation when it can be pushed down into the
// query layer.
assert.eq(1, coll.aggregate([{$match: {a: "A"}}]).itcount());
// Test that the $match respects the inherited collation when it cannot be pushed down into the
// query layer.
assert.eq(1, coll.aggregate([{$project: {b: "B"}}, {$match: {b: "b"}}]).itcount());
})();
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