ENGCOM-2428: [Forwardport] Fix newsletter subscription behaviour for registered customer. #16947

 - Merge Pull Request #16947 from eduard13/magento2:2.3-develop-PR-port-15479
 - Merged commits:
   1. 4cbb3ab
   2. 924567f
   3. ceb7a41

Author: magento-engcom-team

app/code/Magento/Newsletter/Model/Subscriber.php

@@ -419,7 +419,6 @@ public function subscribe($email)
             self::XML_PATH_CONFIRMATION_FLAG,
             \Magento\Store\Model\ScopeInterface::SCOPE_STORE
         ) == 1 ? true : false;
-        $isOwnSubscribes = false;
 
         $isSubscribeOwnEmail = $this->_customerSession->isLoggedIn()
             && $this->_customerSession->getCustomerDataObject()->getEmail() == $email;
@@ -428,13 +427,7 @@ public function subscribe($email)
             || $this->getStatus() == self::STATUS_NOT_ACTIVE
         ) {
             if ($isConfirmNeed === true) {
-                // if user subscribes own login email - confirmation is not needed
-                $isOwnSubscribes = $isSubscribeOwnEmail;
-                if ($isOwnSubscribes == true) {
-                    $this->setStatus(self::STATUS_SUBSCRIBED);
-                } else {
-                    $this->setStatus(self::STATUS_NOT_ACTIVE);
-                }
+                $this->setStatus(self::STATUS_NOT_ACTIVE);
             } else {
                 $this->setStatus(self::STATUS_SUBSCRIBED);
             }
@@ -460,9 +453,7 @@ public function subscribe($email)
         try {
             /* Save model before sending out email */
             $this->save();
-            if ($isConfirmNeed === true
-                && $isOwnSubscribes === false
-            ) {
+            if ($isConfirmNeed === true) {
                 $this->sendConfirmationRequestEmail();
             } else {
                 $this->sendConfirmationSuccessEmail();

app/code/Magento/Newsletter/Test/Unit/Model/SubscriberTest.php

@@ -5,6 +5,8 @@
  */
 namespace Magento\Newsletter\Test\Unit\Model;
 
+use Magento\Newsletter\Model\Subscriber;
+
 /**
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
@@ -116,7 +118,7 @@ public function testSubscribe()
         $email = '[email protected]';
         $this->resource->expects($this->any())->method('loadByEmail')->willReturn(
             [
-                'subscriber_status' => 3,
+                'subscriber_status' => Subscriber::STATUS_UNSUBSCRIBED,
                 'subscriber_email' => $email,
                 'name' => 'subscriber_name'
             ]
@@ -133,15 +135,15 @@ public function testSubscribe()
         $this->sendEmailCheck();
         $this->resource->expects($this->atLeastOnce())->method('save')->willReturnSelf();
 
-        $this->assertEquals(1, $this->subscriber->subscribe($email));
+        $this->assertEquals(Subscriber::STATUS_NOT_ACTIVE, $this->subscriber->subscribe($email));
     }
 
     public function testSubscribeNotLoggedIn()
     {
         $email = '[email protected]';
         $this->resource->expects($this->any())->method('loadByEmail')->willReturn(
             [
-                'subscriber_status' => 3,
+                'subscriber_status' => Subscriber::STATUS_UNSUBSCRIBED,
                 'subscriber_email' => $email,
                 'name' => 'subscriber_name'
             ]
@@ -158,7 +160,7 @@ public function testSubscribeNotLoggedIn()
         $this->sendEmailCheck();
         $this->resource->expects($this->atLeastOnce())->method('save')->willReturnSelf();
 
-        $this->assertEquals(2, $this->subscriber->subscribe($email));
+        $this->assertEquals(Subscriber::STATUS_NOT_ACTIVE, $this->subscriber->subscribe($email));
     }
 
     public function testUpdateSubscription()
@@ -175,7 +177,7 @@ public function testUpdateSubscription()
             ->willReturn(
                 [
                     'subscriber_id' => 1,
-                    'subscriber_status' => 1
+                    'subscriber_status' => Subscriber::STATUS_SUBSCRIBED
                 ]
             );
         $customerDataMock->expects($this->atLeastOnce())->method('getId')->willReturn('id');
@@ -210,7 +212,7 @@ public function testUnsubscribeCustomerById()
             ->willReturn(
                 [
                     'subscriber_id' => 1,
-                    'subscriber_status' => 1
+                    'subscriber_status' => Subscriber::STATUS_SUBSCRIBED
                 ]
             );
         $customerDataMock->expects($this->atLeastOnce())->method('getId')->willReturn('id');
@@ -236,7 +238,7 @@ public function testSubscribeCustomerById()
             ->willReturn(
                 [
                     'subscriber_id' => 1,
-                    'subscriber_status' => 3
+                    'subscriber_status' => Subscriber::STATUS_UNSUBSCRIBED
                 ]
             );
         $customerDataMock->expects($this->atLeastOnce())->method('getId')->willReturn('id');
@@ -262,7 +264,7 @@ public function testSubscribeCustomerById1()
             ->willReturn(
                 [
                     'subscriber_id' => 1,
-                    'subscriber_status' => 3
+                    'subscriber_status' => Subscriber::STATUS_UNSUBSCRIBED
                 ]
             );
         $customerDataMock->expects($this->atLeastOnce())->method('getId')->willReturn('id');
@@ -276,7 +278,7 @@ public function testSubscribeCustomerById1()
         $this->scopeConfig->expects($this->atLeastOnce())->method('getValue')->with()->willReturn(true);
 
         $this->subscriber->subscribeCustomerById($customerId);
-        $this->assertEquals(\Magento\Newsletter\Model\Subscriber::STATUS_NOT_ACTIVE, $this->subscriber->getStatus());
+        $this->assertEquals(Subscriber::STATUS_NOT_ACTIVE, $this->subscriber->getStatus());
     }
 
     public function testSubscribeCustomerByIdAfterConfirmation()
@@ -293,7 +295,7 @@ public function testSubscribeCustomerByIdAfterConfirmation()
             ->willReturn(
                 [
                     'subscriber_id' => 1,
-                    'subscriber_status' => 4
+                    'subscriber_status' => Subscriber::STATUS_UNCONFIRMED
                 ]
             );
         $customerDataMock->expects($this->atLeastOnce())->method('getId')->willReturn('id');
@@ -305,7 +307,7 @@ public function testSubscribeCustomerByIdAfterConfirmation()
         $this->scopeConfig->expects($this->atLeastOnce())->method('getValue')->with()->willReturn(true);
 
         $this->subscriber->updateSubscription($customerId);
-        $this->assertEquals(\Magento\Newsletter\Model\Subscriber::STATUS_SUBSCRIBED, $this->subscriber->getStatus());
+        $this->assertEquals(Subscriber::STATUS_SUBSCRIBED, $this->subscriber->getStatus());
     }
 
     public function testUnsubscribe()