MAGETWO-85783: #12439 Newsletter subscription success email not sent… #12751

 - Merge Pull Request #12751 from Styopchik/magento2:#12439
 - Merged commits:
   1. c4e4168

Author: miguelbalparda

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

@@ -633,6 +633,8 @@ public function confirm($code)
             $this->setStatus(self::STATUS_SUBSCRIBED)
                 ->setStatusChanged(true)
                 ->save();
+
+            $this->sendConfirmationSuccessEmail();
             return true;
         }
 

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

@@ -341,6 +341,21 @@ public function testConfirm()
         $code = 111;
         $this->subscriber->setCode($code);
         $this->resource->expects($this->once())->method('save')->willReturnSelf();
+        $storeModel = $this->getMockBuilder(\Magento\Store\Model\Store::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['getId'])
+            ->getMock();
+        $transport = $this->createMock(\Magento\Framework\Mail\TransportInterface::class);
+        $this->scopeConfig->expects($this->any())->method('getValue')->willReturn(true);
+        $this->transportBuilder->expects($this->once())->method('setTemplateIdentifier')->willReturnSelf();
+        $this->transportBuilder->expects($this->once())->method('setTemplateOptions')->willReturnSelf();
+        $this->transportBuilder->expects($this->once())->method('setTemplateVars')->willReturnSelf();
+        $this->transportBuilder->expects($this->once())->method('setFrom')->willReturnSelf();
+        $this->transportBuilder->expects($this->once())->method('addTo')->willReturnSelf();
+        $this->storeManager->expects($this->any())->method('getStore')->willReturn($storeModel);
+        $storeModel->expects($this->any())->method('getId')->willReturn(1);
+        $this->transportBuilder->expects($this->once())->method('getTransport')->willReturn($transport);
+        $transport->expects($this->once())->method('sendMessage')->willReturnSelf();
 
         $this->assertTrue($this->subscriber->confirm($code));
     }