test for action.js

app/components/atoms/LanguageProvider/tests/action.test.js

@@ -0,0 +1,15 @@
+import { changeLocale } from '../actions';
+import { CHANGE_LOCALE } from '../constants';
+
+// Test suite for the changeLocale action creator
+describe('changeLocale action creator', () => {
+  it('should create an action to change the locale', () => {
+    const languageLocale = 'en';
+    const expectedAction = {
+      type: CHANGE_LOCALE,
+      locale: languageLocale
+    };
+    const action = changeLocale(languageLocale);
+    expect(action).toEqual(expectedAction);
+  });
+});

app/scenes/RootScreen/index.js

@@ -1,22 +1,18 @@
 import { connect } from 'react-redux';
 import { PropTypes } from 'prop-types';
-import NavigationService from '@services/NavigationService';
 import AppNavigator from '@navigators/AppNavigator';
 import Container from '@atoms/Container';
 
 import { rootScreenActions } from './reducer';
 import React, { useEffect } from 'react';
+import setRefForTopLevelNavigtor from '@app/services/NavigationService';
 
 const RootScreen = props => {
   useEffect(() => {
     // Run the startup function when the component mounts
     props.startup();
   }, []);
 
-  const setRefForTopLevelNavigtor = navigatorRef => {
-    NavigationService.setTopLevelNavigator(navigatorRef);
-  };
-
   return (
     <Container testID="root-screen">
       <AppNavigator ref={setRefForTopLevelNavigtor} />