From f4ef651605d8402701bbd1401e84438d1f9ea2db Mon Sep 17 00:00:00 2001
From: Oskar Eichler <62393985+OskarEichler@users.noreply.github.com>
Date: Thu, 27 Aug 2026 20:34:33 +0300
Subject: [PATCH] fix(mock): clear held storage instances when resetting

---
 .changeset/review-mock-reset.md                     | 6 ++++++
 packages/async-storage/src/jest/AsyncStorageMock.ts | 9 +++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/review-mock-reset.md

diff --git a/.changeset/review-mock-reset.md b/.changeset/review-mock-reset.md
new file mode 100644
index 00000000..23d37960
--- /dev/null
+++ b/.changeset/review-mock-reset.md
@@ -0,0 +1,6 @@
+---
+"@react-native-async-storage/async-storage": patch
+---
+
+Clear existing mock stores before resetting the registry and preserve the default legacy instance's registry identity.
+
diff --git a/packages/async-storage/src/jest/AsyncStorageMock.ts b/packages/async-storage/src/jest/AsyncStorageMock.ts
index 70bc9ee6..e615a991 100644
--- a/packages/async-storage/src/jest/AsyncStorageMock.ts
+++ b/packages/async-storage/src/jest/AsyncStorageMock.ts
@@ -43,7 +43,7 @@ class AsyncStorageMemoryImpl implements AsyncStorage {
   };
 }
 
-const inMemoryDbRegistry = new Map<string, AsyncStorageMemoryImpl>();
+const inMemoryDbRegistry = new Map<string, AsyncStorage>();
 
 export function createAsyncStorage(databaseName: string): AsyncStorage {
   if (!inMemoryDbRegistry.has(databaseName)) {
@@ -53,7 +53,12 @@ export function createAsyncStorage(databaseName: string): AsyncStorage {
 }
 
 export function clearAllMockStorages(): void {
+  for (const storage of inMemoryDbRegistry.values()) {
+    void storage.clear();
+  }
   inMemoryDbRegistry.clear();
+  inMemoryDbRegistry.set("legacy", legacyStorage);
 }
 
-export default createAsyncStorage("legacy");
+const legacyStorage = createAsyncStorage("legacy");
+export default legacyStorage;