chore(account): write tests for CreateAccessToken [EE-2561] (#6578)

app/__mocks__/i18next.test.ts

@@ -0,0 +1,39 @@
+import * as i18nextMocks from './i18next';
+
+describe('mockT', () => {
+  it('should return correctly with no arguments', async () => {
+    const testText = `The company's new IT initiative, code named Phoenix Project, is critical to the
+        future of Parts Unlimited, but the project is massively over budget and very late. The CEO wants
+        Bill to report directly to him and fix the mess in ninety days or else Bill's entire department
+        will be outsourced.`;
+
+    const translatedText = i18nextMocks.mockT(testText);
+
+    expect(translatedText).toBe(testText);
+  });
+
+  test.each`
+    testText                            | args                                          | expectedText
+    ${'{{fileName}} is invalid.'}       | ${{ fileName: 'example_5.csv' }}              | ${'example_5.csv is invalid.'}
+    ${'{{fileName}} {is}.'}             | ${{ fileName: '   ' }}                        | ${'    {is}.'}
+    ${'{{number}} of {{total}}'}        | ${{ number: 0, total: 999 }}                  | ${'0 of 999'}
+    ${'There was an error:\n{{error}}'} | ${{ error: 'Failed' }}                        | ${'There was an error:\nFailed'}
+    ${'Click:{{li}}{{li2}}{{li_3}}'}    | ${{ li: '', li2: 'https://', li_3: '!@#$%' }} | ${'Click:https://!@#$%'}
+    ${'{{happy}}😏y✔{{sad}}{{laugh}}'}  | ${{ happy: '😃', sad: '😢', laugh: '🤣' }}    | ${'😃😏y✔😢🤣'}
+  `(
+    'should return correctly while handling arguments in different scenarios',
+    ({ testText, args, expectedText }) => {
+      const translatedText = i18nextMocks.mockT(testText, args);
+
+      expect(translatedText).toBe(expectedText);
+    }
+  );
+});
+
+describe('language', () => {
+  it('should return language', async () => {
+    const { language } = i18nextMocks.default;
+
+    expect(language).toBe('en');
+  });
+});