From a8e9938abcb00b67816438fb7c9db890e35d63c9 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Fri, 24 Sep 2021 17:46:54 -0400
Subject: [PATCH] fix(NODE-3609): correct listDatabases return type (#2986)

---
 src/operations/list_databases.ts |  7 ++++++-
 test/types/admin.test-d.ts       | 12 ++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 test/types/admin.test-d.ts

diff --git a/src/operations/list_databases.ts b/src/operations/list_databases.ts
index d138e35910..5a5ed52927 100644
--- a/src/operations/list_databases.ts
+++ b/src/operations/list_databases.ts
@@ -7,7 +7,12 @@ import type { Db } from '../db';
 import type { ClientSession } from '../sessions';
 
 /** @public */
-export type ListDatabasesResult = string[] | Document[];
+export interface ListDatabasesResult {
+  databases: ({ name: string; sizeOnDisk?: number; empty?: boolean } & Document)[];
+  totalSize?: number;
+  totalSizeMb?: number;
+  ok: 1 | 0;
+}
 
 /** @public */
 export interface ListDatabasesOptions extends CommandOperationOptions {
diff --git a/test/types/admin.test-d.ts b/test/types/admin.test-d.ts
new file mode 100644
index 0000000000..ef76c3fb40
--- /dev/null
+++ b/test/types/admin.test-d.ts
@@ -0,0 +1,12 @@
+import { expectType } from 'tsd';
+import { Document, MongoClient } from '../../src/index';
+
+const client = new MongoClient('');
+const admin = client.db().admin();
+
+expectType<{
+  databases: ({ name: string; sizeOnDisk?: number; empty?: boolean } & Document)[];
+  totalSize?: number;
+  totalSizeMb?: number;
+  ok: 1 | 0;
+}>(await admin.listDatabases());