adding tests for utils

__tests__/utils.test.ts

@@ -0,0 +1,20 @@
+import {getLanguages} from '../src/utils';
+import axios from 'axios';
+jest.mock('axios');
+
+const mockedAxios = axios as jest.Mocked<typeof axios>;
+
+describe('getLanguages function', () => {
+    it('should return a list of languages',  async () =>{
+        const languages = [{"code":"et-EE","name":"Estonian (Estonia)"},{"code":"fo","name":"Faroese"}];
+        const response = {"data":languages};
+        mockedAxios.get.mockImplementationOnce(() => Promise.resolve(response));
+        await expect(getLanguages('http://api.test.com')).resolves.toEqual(languages);
+    });
+    it('should return an error if something goes wrong', async () => {
+        const Error = 'network error';
+        mockedAxios.get.mockRejectedValue(Error);
+        const returnValue = await getLanguages('http://api.test.com');
+        expect(returnValue).toEqual(Error);
+    });
+});