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fix(NODE-3567): correct typing on aggregation out helper #2967

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merged 1 commit into from Sep 1, 2021
Merged

fix(NODE-3567): correct typing on aggregation out helper #2967

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4 changes: 2 additions & 2 deletions src/cursor/aggregation_cursor.ts
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Expand Up @@ -120,8 +120,8 @@ export class AggregationCursor<TSchema = Document> extends AbstractCursor<TSchem
return this;
}

/** Add a out stage to the aggregation pipeline */
out($out: number): this {
/** Add an out stage to the aggregation pipeline */
out($out: string): this {
assertUninitialized(this);
this[kPipeline].push({ $out });
return this;
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6 changes: 5 additions & 1 deletion test/types/mongodb.test-d.ts
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@@ -1,4 +1,4 @@
import { expectType, expectDeprecated } from 'tsd';
import { expectType, expectDeprecated, expectError } from 'tsd';
import { MongoClient } from '../../src/mongo_client';
import { Collection } from '../../src/collection';
import { AggregationCursor } from '../../src/cursor/aggregation_cursor';
Expand Down Expand Up @@ -35,3 +35,7 @@ const composedMap = mappedAgg.map<string>(x => x.toString());
expectType<AggregationCursor<string>>(composedMap);
expectType<string | null>(await composedMap.next());
expectType<string[]>(await composedMap.toArray());

const builtCursor = coll.aggregate();
expectType<AggregationCursor<Document>>(builtCursor.out('string')); // should allow string values for the out helper
expectError(builtCursor.out(1)); // should error on non-string values