Solution

cypress.config.js

@@ -2,6 +2,7 @@ const { defineConfig } = require('cypress');
 
 module.exports = defineConfig({
   e2e: {
+    baseUrl: 'https://react-redux.realworld.io',
     setupNodeEvents(on, config) {
       // implement node event listeners here
     }

cypress/e2e/signUp.cy.js

@@ -1,5 +1,15 @@
+import { generateUser } from '../support/generate.js';
+
 describe('Sign Up page', () => {
   it('should provide an ability to register new account', () => {
+    const user = generateUser();
 
+    cy.visit('/#/register?_k=t01ofk');
+    cy.get('[placeholder="Username"]').type(user.username);
+    cy.get('[placeholder="Email"]').type(user.email);
+    cy.get('[placeholder="Password"]').type(user.password);
+    cy.get('[type="submit"]').click();
+    cy.get('[class="navbar-brand"]').click();
+    cy.get('.pull-xs-right.navbar-nav').should('contain', user.username);
   });
 });

cypress/support/generate.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 };