Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

feat(NODE-3692): make change stream events typing more generic #3034

Merged
merged 6 commits into from Nov 10, 2021
Merged

feat(NODE-3692): make change stream events typing more generic #3034

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
08d91d1
Added event typing for change streams
mrbrianevans Sep 23, 2021
53123fe
style(NODE-3692): fix eslint formatting
mrbrianevans Oct 22, 2021
42339e5
test(NODE-3692): add type tests
durran Nov 9, 2021
0a2bcef
test(NODE-3692): update to check TSchema
durran Nov 10, 2021
4a3003a
test(NODE-3692): fix lint errors
durran Nov 10, 2021
0f0fa27
fix(NODE-3692): make TSchema attribute non optional
durran Nov 10, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
14 changes: 7 additions & 7 deletions src/change_stream.ts
View file
Open in desktop
Expand Up @@ -184,23 +184,23 @@ export interface UpdateDescription<TSchema extends Document = Document> {
}

/** @public */
export type ChangeStreamEvents = {
export type ChangeStreamEvents<TSchema extends Document = Document> = {
resumeTokenChanged(token: ResumeToken): void;
init(response: Document): void;
more(response?: Document | undefined): void;
init(response: TSchema): void;
more(response?: TSchema | undefined): void;
response(): void;
end(): void;
error(error: Error): void;
change(change: ChangeStreamDocument): void;
change(change: ChangeStreamDocument<TSchema>): void;
} & AbstractCursorEvents;

/**
* Creates a new Change Stream instance. Normally created using {@link Collection#watch|Collection.watch()}.
* @public
*/
export class ChangeStream<
TSchema extends Document = Document
> extends TypedEventEmitter<ChangeStreamEvents> {
export class ChangeStream<TSchema extends Document = Document> extends TypedEventEmitter<
ChangeStreamEvents<TSchema>
> {
pipeline: Document[];
options: ChangeStreamOptions;
parent: MongoClient | Db | Collection;
Expand Down
19 changes: 18 additions & 1 deletion test/types/mongodb.test-d.ts
View file
Open in desktop
Expand Up @@ -3,6 +3,7 @@ import { MongoClient } from '../../src/mongo_client';
import { Collection } from '../../src/collection';
import { AggregationCursor } from '../../src/cursor/aggregation_cursor';
import type { FindCursor } from '../../src/cursor/find_cursor';
import type { ChangeStreamDocument } from '../../src/change_stream';
import type { Document } from 'bson';
import { Db } from '../../src';
import { Topology } from '../../src/sdam/topology';
Expand All @@ -19,9 +20,14 @@ expectDeprecated(Db.prototype.unref);
expectDeprecated(MongoDBDriver.ObjectID);
expectNotDeprecated(MongoDBDriver.ObjectId);

interface TSchema extends Document {
name: string;
}

// test mapped cursor types
const client = new MongoClient('');
const coll = client.db('test').collection('test');
const db = client.db('test');
const coll = db.collection('test');
const findCursor = coll.find();
expectType<Document | null>(await findCursor.next());
const mappedFind = findCursor.map<number>(obj => Object.keys(obj).length);
Expand All @@ -38,6 +44,17 @@ const composedMap = mappedAgg.map<string>(x => x.toString());
expectType<AggregationCursor<string>>(composedMap);
expectType<string | null>(await composedMap.next());
expectType<string[]>(await composedMap.toArray());
const tschemaColl = db.collection<TSchema>('test');
const changeStream = tschemaColl.watch();
changeStream.on('init', doc => {
expectType<TSchema>(doc);
});
changeStream.on('more', doc => {
expectType<TSchema | undefined>(doc);
});
changeStream.on('change', doc => {
expectType<ChangeStreamDocument<TSchema>>(doc);
});

const builtCursor = coll.aggregate();
// should allow string values for the out helper
Expand Down