[TS migration] Migrate react-native-onyx mock

__mocks__/react-native-onyx.ts

@@ -0,0 +1,43 @@
+/**
+ * We are disabling the lint rule that doesn't allow the usage of Onyx.connect outside libs
+ * because the intent of this file is to mock the usage of react-native-onyx so we will have to mock the connect function
+ */
+
+/* eslint-disable rulesdir/prefer-onyx-connect-in-libs */
+import type {ConnectOptions, OnyxKey} from 'react-native-onyx';
+import Onyx, {withOnyx} from 'react-native-onyx';
+
+let connectCallbackDelay = 0;
+function addDelayToConnectCallback(delay: number) {
+    connectCallbackDelay = delay;
+}
+
+type ReactNativeOnyxMock = {
+    addDelayToConnectCallback: (delay: number) => void;
+} & typeof Onyx;
+
+type ConnectionCallback<TKey extends OnyxKey> = NonNullable<ConnectOptions<TKey>['callback']>;
+type ConnectionCallbackParams<TKey extends OnyxKey> = Parameters<ConnectionCallback<TKey>>;
+
+const reactNativeOnyxMock: ReactNativeOnyxMock = {
+    ...Onyx,
+    connect: <TKey extends OnyxKey>(mapping: ConnectOptions<TKey>) => {
+        const callback = (...params: ConnectionCallbackParams<TKey>) => {
+            if (connectCallbackDelay > 0) {
+                setTimeout(() => {
+                    (mapping.callback as (...args: ConnectionCallbackParams<TKey>) => void)?.(...params);
+                }, connectCallbackDelay);
+            } else {
+                (mapping.callback as (...args: ConnectionCallbackParams<TKey>) => void)?.(...params);
+            }
+        };
+        return Onyx.connect({
+            ...mapping,
+            callback,
+        });
+    },
+    addDelayToConnectCallback,
+};
+
+export default reactNativeOnyxMock;
+export {withOnyx};