Fix code quality issues and improve test framework

cypress/support/commands.js

@@ -0,0 +1,20 @@
+// ***********************************************
+// This example commands.js shows you how to
+// create various custom commands and overwrite
+// existing commands.
+//
+// For more comprehensive examples of custom
+// commands please read more here:
+// https://on.cypress.io/custom-commands
+// ***********************************************
+
+/**
+ * Custom command to login as admin
+ */
+Cypress.Commands.add('loginAsAdmin', () => {
+  cy.visit('/wp-admin');
+  cy.get('#user_login').type('admin');
+  cy.get('#user_pass').type('password');
+  cy.get('#wp-submit').click();
+  cy.get('body.wp-admin').should('exist');
+});

cypress/support/e2e.js

@@ -0,0 +1,17 @@
+// ***********************************************************
+// This example support/e2e.js is processed and
+// loaded automatically before your test files.
+//
+// This is a great place to put global configuration and
+// behavior that modifies Cypress.
+//
+// You can change the location of this file or turn off
+// automatically serving support files with the
+// 'supportFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/configuration
+// ***********************************************************
+
+// Import commands.js using ES2015 syntax:
+import './commands';