Integration Tests for Authentication feature on Customer Account

Author: lbajsarowicz

dev/tests/integration/testsuite/Magento/Customer/Controller/AuthenticationTest.php

@@ -0,0 +1,70 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Customer\Controller;
+
+use Magento\Customer\Controller\Plugin\Account as AccountPlugin;
+use Magento\TestFramework\TestCase\AbstractController;
+
+/**
+ * Set of Tests to verify that Authentication methods work properly
+ */
+class AuthenticationTest extends AbstractController
+{
+    /**
+     * Make sure that customized AccountPlugin was reverted.
+     */
+    protected function tearDown()
+    {
+        $this->resetAllowedActions();
+        parent::tearDown();
+    }
+
+    /**
+     * After changes to `di.xml` and overriding list of allowed actions, unallowed ones should cause redirect.
+     */
+    public function testExpectRedirectResponseWhenDispatchNotAllowedAction()
+    {
+        $this->overrideAllowedActions(['notExistingRoute']);
+
+        $this->dispatch('customer/account/create');
+        $this->assertRedirect($this->stringContains('customer/account/login'));
+    }
+
+    /**
+     * Allowed actions should be displayed
+     */
+    public function testExpectPageDispatchWhenAllowedAction()
+    {
+        $this->overrideAllowedActions(['create']);
+
+        $this->dispatch('customer/account/create');
+        $this->assertEquals(200, $this->getResponse()->getStatusCode());
+    }
+
+    /**
+     * Overrides list of `allowedActions` for Authorization Plugin
+     *
+     * @param string[] $allowedActions
+     * @see \Magento\Customer\Controller\Plugin\Account
+     */
+    private function overrideAllowedActions(array $allowedActions): void
+    {
+        $allowedActions = array_combine($allowedActions, $allowedActions);
+        $pluginMock = $this->_objectManager->create(AccountPlugin::class, ['allowedActions' => $allowedActions]);
+        $this->_objectManager->addSharedInstance($pluginMock, AccountPlugin::class);
+    }
+
+    /**
+     * Removes all the customizations applied to `allowedActions`
+     * @see \Magento\Customer\Controller\Plugin\Account
+     */
+    private function resetAllowedActions()
+    {
+        $this->_objectManager->removeSharedInstance(AccountPlugin::class);
+    }
+}