Wrote end-to-end cypress tests

client/cypress/integration/authentication.spec.js

@@ -0,0 +1,21 @@
+import { testid } from '../support/utils';
+
+describe('Authentication', () => {
+  beforeEach(() => {
+    cy.resetDatabase();
+    cy.visit('/');
+  });
+
+  it('creates guest account if user has no auth token', () => {
+    cy.window()
+      .its('localStorage.authToken')
+      .should('be.undefined');
+
+    cy.window()
+      .its('localStorage.authToken')
+      .should('be.a', 'string')
+      .and('not.be.empty');
+
+    cy.get(testid`list-issue`).should('have.length', 7);
+  });
+});