Migrate from flow to typescript

tests-e2e/cypress/integration/dev/guest.test.ts

@@ -1,3 +1,4 @@
+/// <reference types="cypress" />
 describe('/dev/applications - guest', () => {
   it('should render login button', () => {
     cy.visit('/dev/applications');

tests-e2e/cypress/integration/dev/user.test.ts

@@ -1,10 +1,12 @@
+/// <reference types="cypress" />
+
 describe('/dev/applications - user', () => {
   before(() => {
     cy.login({ account: 'default' }).then(({ user }) => {
       cy.visit('/dev/applications');
 
       // remove all previousely added apps
-      cy.window().then(async ({ oauthApi }) => {
+      cy.window().then(async (/** @type {any} */ { oauthApi }) => {
         const apps = await oauthApi.getAppsByUser(user.id);
 
         await Promise.all(apps.map(app => oauthApi.delete(app.clientId)));

tests-e2e/cypress/integration/invalid-refreshToken.test.ts

@@ -1,3 +1,5 @@
+/// <reference types="cypress" />
+
 // account1 - authenticated
 // account2 - invalid refreshToken
 import { account1, account2 } from '../fixtures/accounts.json';
@@ -23,9 +25,13 @@ describe("when user's token and refreshToken are invalid", () => {
         .then(resp => resp.json())
         .then(resp => {
           const account = multiAccount.accounts.available.find(
-            account => account.username === account1.username,
+            item => item.username === account1.username,
           );
 
+          if (!account) {
+            throw new Error('Can not find an account');
+          }
+
           account.token = resp.access_token;
         }),
     ),

tests-e2e/cypress/integration/sign-in.test.ts

@@ -1,3 +1,4 @@
+/// <reference types="cypress" />
 import { account1 } from '../fixtures/accounts.json';
 
 describe('sign in', () => {
@@ -17,10 +18,10 @@ describe('sign in', () => {
     cy.get('[data-e2e-toolbar]')
       .contains(account1.username)
       .should(() => {
-        const state = JSON.parse(localStorage.getItem('redux-storage'));
+        const state = JSON.parse(localStorage.getItem('redux-storage') || '');
         expect(state.accounts.available).to.have.length(1);
 
-        const account = state.accounts.available[0];
+        const [account] = state.accounts.available;
         expect(account.username).to.be.equal(account1.username);
         expect(account.id)
           .to.be.a('number')