⏫ Forwardport of #11608 to 2.3-develop branch

Applied pull request patch https://github.com/magento/magento2/pull/11608.patch (created by @sylink) based on commit(s):
  1. 40d51e4
  2. c7a6c56

Fixed GitHub Issues in 2.3-develop branch:
  - #9633: Web Setup Wizard 500 error when session storage is configured to use memcache (reported by @dotsoa)

dev/tests/integration/testsuite/Magento/Framework/Session/ConfigTest.php

@@ -36,15 +36,18 @@ protected function setUp()
             $sessionManager->writeClose();
         }
         $this->deploymentConfigMock = $this->createMock(\Magento\Framework\App\DeploymentConfig::class);
-
-        $this->deploymentConfigMock->expects($this->at(0))
-            ->method('get')
-            ->with(Config::PARAM_SESSION_SAVE_PATH)
-            ->will($this->returnValue(null));
-        $this->deploymentConfigMock->expects($this->at(1))
+        $this->deploymentConfigMock
             ->method('get')
-            ->with(Config::PARAM_SESSION_CACHE_LIMITER)
-            ->will($this->returnValue($this->_cacheLimiter));
+            ->willReturnCallback(function ($configPath) {
+                switch ($configPath) {
+                    case Config::PARAM_SESSION_SAVE_METHOD:
+                        return 'files';
+                    case Config::PARAM_SESSION_CACHE_LIMITER:
+                        return $this->_cacheLimiter;
+                    default:
+                        return null;
+                }
+            });
 
         $this->_model = $this->_objectManager->create(
             \Magento\Framework\Session\Config::class,
@@ -83,15 +86,6 @@ public function testDefaultConfiguration()
         $this->assertEquals($this->_model->getSavePath(), $this->_model->getOption('save_path'));
     }
 
-    /**
-     * Unable to add integration tests for testGetLifetimePathNonDefault
-     *
-     * Error: Cannot modify header information - headers already sent
-     */
-    public function testGetLifetimePathNonDefault()
-    {
-    }
-
     public function testSetOptionsInvalidValue()
     {
         $preValue = $this->_model->getOptions();
@@ -280,16 +274,27 @@ public function testConstructorSavePath($existing, $given, $expected)
             $this->markTestSkipped('Cannot set session.save_path with ini_set');
         }
 
-        $this->deploymentConfigMock->expects($this->at(0))
+        $deploymentConfigMock = $this->createMock(\Magento\Framework\App\DeploymentConfig::class);
+        $deploymentConfigMock
             ->method('get')
-            ->with(Config::PARAM_SESSION_SAVE_PATH)
-            ->will($this->returnValue($given));
-
-        $this->_model = $this->_objectManager->create(
+            ->willReturnCallback(function ($configPath) use ($given) {
+                switch ($configPath) {
+                    case Config::PARAM_SESSION_SAVE_METHOD:
+                        return 'files';
+                    case Config::PARAM_SESSION_CACHE_LIMITER:
+                        return $this->_cacheLimiter;
+                    case Config::PARAM_SESSION_SAVE_PATH:
+                        return $given;
+                    default:
+                        return null;
+                }
+            });
+
+        $model = $this->_objectManager->create(
             \Magento\Framework\Session\Config::class,
-            ['deploymentConfig' => $this->deploymentConfigMock]
+            ['deploymentConfig' => $deploymentConfigMock]
         );
-        $this->assertEquals($expected, $this->_model->getOption('save_path'));
+        $this->assertEquals($expected, $model->getOption('save_path'));
 
         if ($sessionSavePath != ini_get('session.save_path')) {
             ini_set('session.save_path', $sessionSavePath);

lib/internal/Magento/Framework/Session/Config.php

@@ -134,6 +134,14 @@ public function __construct(
             $this->setSavePath($savePath);
         }
 
+        /**
+        * Session save handler - memcache, files, etc
+        */
+        $saveHandler = $deploymentConfig->get(self::PARAM_SESSION_SAVE_METHOD);
+        if ($saveHandler) {
+            $this->setOption('session.save_handler', $saveHandler);
+        }
+
         /**
          * Session cache limiter
          */

lib/internal/Magento/Framework/Session/Test/Unit/ConfigTest.php

@@ -350,33 +350,36 @@ public function constructorDataProvider()
                 true,
                 true,
                 [
-                    'session.cache_limiter' => 'files',
+                    'session.cache_limiter' => 'private_no_expire',
                     'session.cookie_lifetime' => 7200,
                     'session.cookie_path' => '/',
                     'session.cookie_domain' => 'init.host',
                     'session.cookie_httponly' => false,
                     'session.cookie_secure' => false,
+                    'session.save_handler' => 'files'
                 ],
             ],
             'all invalid' => [
                 true,
                 false,
                 [
-                    'session.cache_limiter' => 'files',
+                    'session.cache_limiter' => 'private_no_expire',
                     'session.cookie_httponly' => false,
                     'session.cookie_secure' => false,
+                    'session.save_handler' => 'files'
                 ],
             ],
             'invalid_valid' => [
                 false,
                 true,
                 [
-                    'session.cache_limiter' => 'files',
+                    'session.cache_limiter' => 'private_no_expire',
                     'session.cookie_lifetime' => 3600,
                     'session.cookie_path' => '/',
                     'session.cookie_domain' => 'init.host',
                     'session.cookie_httponly' => false,
                     'session.cookie_secure' => false,
+                    'session.save_handler' => 'files'
                 ],
             ],
         ];
@@ -429,14 +432,18 @@ protected function getModel($validator)
             ->will($this->returnValue($dirMock));
 
         $deploymentConfigMock = $this->createMock(\Magento\Framework\App\DeploymentConfig::class);
-        $deploymentConfigMock->expects($this->at(0))
+        $deploymentConfigMock
             ->method('get')
-            ->with(Config::PARAM_SESSION_SAVE_PATH)
-            ->will($this->returnValue(null));
-        $deploymentConfigMock->expects($this->at(1))
-            ->method('get')
-            ->with(Config::PARAM_SESSION_CACHE_LIMITER)
-            ->will($this->returnValue('files'));
+            ->willReturnCallback(function ($configPath) {
+                switch ($configPath) {
+                    case Config::PARAM_SESSION_SAVE_METHOD:
+                        return 'files';
+                    case Config::PARAM_SESSION_CACHE_LIMITER:
+                        return 'private_no_expire';
+                    default:
+                        return null;
+                }
+            });
 
         $this->config = $this->helper->getObject(
             \Magento\Framework\Session\Config::class,