chore: unit test defensive get on KeyringController

Author: khanti42

app/components/UI/NetworkMultiSelectorList/NetworkMultiSelectorList.test.tsx

@@ -31,6 +31,27 @@ jest.mock('react-redux', () => ({
   useSelector: jest.fn(),
 }));
 
+// Avoid loading keyring-utils, keyring-api, and the network/Engine chain in this test
+jest.mock('../../../selectors/accountsController', () => ({
+  selectSelectedInternalAccountFormattedAddress: jest.fn(),
+}));
+
+jest.mock('../../../util/address', () => ({
+  isHardwareAccount: jest.fn(() => false),
+}));
+
+jest.mock('@metamask/keyring-api', () => ({
+  EntropySourceId: {},
+  BtcMethod: {},
+  EthMethod: {},
+  SolAccountType: {},
+  SolMethod: {},
+  TrxMethod: {},
+  isEvmAccountType: jest.fn(),
+  KeyringAccountType: {},
+  EthScope: {},
+}));
+
 jest.mock('react-native-safe-area-context', () => ({
   useSafeAreaInsets: jest.fn(),
 }));

app/util/address/index.ts

@@ -266,8 +266,11 @@ export function getKeyringByAddress(address: string) {
   if (!isValidHexAddress(address)) {
     return undefined;
   }
-  const { KeyringController } = Engine.context;
-  const { keyrings } = KeyringController.state;
+  const KeyringController = Engine.context?.KeyringController;
+  const keyrings = KeyringController?.state?.keyrings;
+  if (!keyrings?.length) {
+    return undefined;
+  }
   return keyrings.find((keyring) =>
     keyring.accounts
       .map((account) => toFormattedAddress(account))