initial commit - working NODE POC

add tests for new flags added with dropCollection

add tests for new change stream events and refactor existing tests

update change stream type changes to reflect new events

clean up change stream, export new types and add type tests

fix rename test to always drop the target collection

add change stream test for shardCollection

clean up spec tests

update spec tests

initial commit - working NODE POC

add tests for new change stream events and refactor existing tests

update change stream type changes to reflect new events

clean up change stream, export new types and add type tests

src/change_stream.ts

@@ -1,3 +1,4 @@
+import type { UUID } from 'bson';
 import Denque = require('denque');
 import type { Readable } from 'stream';
 
@@ -50,7 +51,8 @@ const CHANGE_STREAM_OPTIONS = [
   'resumeAfter',
   'startAfter',
   'startAtOperationTime',
-  'fullDocument'
+  'fullDocument',
+  'showExpandedEvents'
 ] as const;
 
 const CURSOR_OPTIONS = [
@@ -155,6 +157,20 @@ export interface ChangeStreamOptions extends AggregateOptions {
    * @see https://docs.mongodb.com/manual/reference/command/aggregate
    */
   batchSize?: number;
+
+  /**
+   * When enabled, configures the change stream to include extra change events.
+   *
+   * - createIndex
+   * - dropIndex
+   * - collMod
+   * - create
+   * - shardCollection
+   * - reshardCollection
+   * - refineCollectionShardKey
+   * - chunkMigrated
+   */
+  showExpandedEvents?: boolean;
 }
 
 /** @public */
@@ -291,6 +307,25 @@ export interface ChangeStreamRenameDocument extends ChangeStreamDocumentCommon {
   to: { db: string; coll: string };
   /** The "from" namespace that the rename occured on */
   ns: ChangeStreamNameSpace;
+  /**
+   * An operation description representing the changes in a `rename` event.
+   *
+   * Only present when the `showExpandedEvents` flag is enabled.
+   *
+   * @since 6.0.0
+   */
+  operationDescription?: {
+    /**
+     * Contains two fields: "db" and "coll" containing the database and
+     * collection name in which the change happened.
+     */
+    to?: { db: string; coll: string };
+
+    /**
+     * The uuid of the target collection that was dropped.
+     */
+    dropTarget?: UUID; // TODO - confirm that this value is optional
+  };
 }
 
 /**
@@ -313,6 +348,45 @@ export interface ChangeStreamInvalidateDocument extends ChangeStreamDocumentComm
   operationType: 'invalidate';
 }
 
+/**
+ * Only present when the `showExpandedEvents` flag is enabled.
+ * @public
+ * @see https://www.mongodb.com/docs/manual/reference/change-events/#invalidate-event
+ */
+export interface ChangeStreamCreateIndexDocument extends ChangeStreamDocumentCommon {
+  /** Describes the type of operation represented in this change notification */
+  operationType: 'createIndexes';
+}
+
+/**
+ * Only present when the `showExpandedEvents` flag is enabled.
+ * @public
+ * @see https://www.mongodb.com/docs/manual/reference/change-events/#invalidate-event
+ */
+export interface ChangeStreamDropIndexDocument extends ChangeStreamDocumentCommon {
+  /** Describes the type of operation represented in this change notification */
+  operationType: 'dropIndexes';
+}
+
+/**
+ * Only present when the `showExpandedEvents` flag is enabled.
+ * @public
+ * @see https://www.mongodb.com/docs/manual/reference/change-events/#invalidate-event
+ */
+export interface ChangeStreamCollModDocument extends ChangeStreamDocumentCommon {
+  /** Describes the type of operation represented in this change notification */
+  operationType: 'modify';
+}
+
+/**
+ * @public
+ * @see https://www.mongodb.com/docs/manual/reference/change-events/#invalidate-event
+ */
+export interface ChangeStreamCreateDocument extends ChangeStreamDocumentCommon {
+  /** Describes the type of operation represented in this change notification */
+  operationType: 'create';
+}
+
 /** @public */
 export type ChangeStreamDocument<TSchema extends Document = Document> =
   | ChangeStreamInsertDocument<TSchema>
@@ -322,7 +396,11 @@ export type ChangeStreamDocument<TSchema extends Document = Document> =
   | ChangeStreamDropDocument
   | ChangeStreamRenameDocument
   | ChangeStreamDropDatabaseDocument
-  | ChangeStreamInvalidateDocument;
+  | ChangeStreamInvalidateDocument
+  | ChangeStreamCreateIndexDocument
+  | ChangeStreamCreateDocument
+  | ChangeStreamCollModDocument
+  | ChangeStreamDropIndexDocument;
 
 /** @public */
 export interface UpdateDescription<TSchema extends Document = Document> {

src/index.ts

@@ -171,6 +171,9 @@ export type { UnorderedBulkOperation } from './bulk/unordered';
 export type {
   ChangeStream,
   ChangeStreamAggregateRawResult,
+  ChangeStreamCollModDocument,
+  ChangeStreamCreateDocument,
+  ChangeStreamCreateIndexDocument,
   ChangeStreamCursor,
   ChangeStreamCursorOptions,
   ChangeStreamDeleteDocument,
@@ -179,6 +182,7 @@ export type {
   ChangeStreamDocumentKey,
   ChangeStreamDropDatabaseDocument,
   ChangeStreamDropDocument,
+  ChangeStreamDropIndexDocument,
   ChangeStreamEvents,
   ChangeStreamInsertDocument,
   ChangeStreamInvalidateDocument,