Solution

cypress/e2e/signUp.cy.js

@@ -1,5 +1,26 @@
+/// <reference types="cypress" />
+import { generateUser } from '../support/generateUser';
+
+const url = 'https://react-redux.realworld.io';
+
 describe('Sign Up page', () => {
   it('should provide an ability to register new account', () => {
+    const user = generateUser();
+
+    cy.visit(url + '/#/register');
+
+    cy.get(`input[placeholder='Username']`)
+      .type(user.username);
+    cy.get(`input[placeholder='Email']`)
+      .type(user.email);
+    cy.get(`input[placeholder='Password']`)
+      .type(user.password);
+
+    cy.get(`button[type='submit']`)
+      .click();
 
+    cy.get(`a[class='nav-link']`)
+      .contains(user.username)
+      .should('exist');
   });
 });

cypress/support/generateUser.js

@@ -0,0 +1,12 @@
+import { faker } from '@faker-js/faker';
+
+function generateUser() {
+  const randomNumber = Math.random().toString().slice(2, 6);
+  const username = faker.internet.userName() + '_' + randomNumber;
+  const email = `${username}@mail.com`;
+  const password = '12345Qwert!';
+
+  return { email, password, username };
+}
+
+module.exports = { generateUser };