Fix RustCrypto.resetEncryption failure (#4772)

* fix(crypto): add missing await to `resetEncryption`

* test(crypto): add `mockResolvedValue` to async mock of 4S

Author: florianduros

spec/unit/rust-crypto/rust-crypto.spec.ts

@@ -2255,10 +2255,10 @@ describe("RustCrypto", () => {
         let secretStorage: ServerSideSecretStorage;
         beforeEach(() => {
             secretStorage = {
-                setDefaultKeyId: jest.fn(),
+                setDefaultKeyId: jest.fn().mockResolvedValue(undefined),
                 hasKey: jest.fn().mockResolvedValue(false),
                 getKey: jest.fn().mockResolvedValue(null),
-                store: jest.fn(),
+                store: jest.fn().mockResolvedValue(undefined),
                 getDefaultKeyId: jest.fn().mockResolvedValue("defaultKeyId"),
             } as unknown as ServerSideSecretStorage;
 

src/rust-crypto/rust-crypto.ts

@@ -1466,6 +1466,7 @@ export class RustCrypto extends TypedEventEmitter<RustCryptoEvents, CryptoEventH
         await this.backupManager.deleteAllKeyBackupVersions();
 
         this.deleteSecretStorage();
+        await this.deleteSecretStorage();
 
         // Reset the cross-signing keys
         await this.crossSigningIdentity.bootstrapCrossSigning({