MDVA-275: Emails from admin being sent out using default config’s email, not the specific store email

- Fixed unit test error

Author: Bukatar, Anna

app/code/Magento/Sales/Test/Unit/Model/Order/Email/SenderBuilderTest.php

@@ -29,6 +29,11 @@ class SenderBuilderTest extends \PHPUnit_Framework_TestCase
      */
     protected $transportBuilder;
 
+    /**
+     * @var \PHPUnit_Framework_MockObject_MockObject
+     */
+    protected $storeMock;
+
     protected function setUp()
     {
         $templateId = 'test_template_id';
@@ -58,7 +63,7 @@ protected function setUp()
             [
                 'getEmailIdentity', 'getCustomerEmail',
                 'getCustomerName', 'getTemplateOptions', 'getEmailCopyTo',
-                'getCopyMethod'
+                'getCopyMethod', 'getStore'
             ],
             [],
             '',
@@ -99,6 +104,9 @@ protected function setUp()
         $this->identityContainerMock->expects($this->once())
             ->method('getEmailIdentity')
             ->will($this->returnValue($emailIdentity));
+        $this->identityContainerMock->expects($this->once())
+            ->method('getStore')
+            ->will($this->returnValue($this->storeMock));
         $this->transportBuilder->expects($this->once())
             ->method('setFrom')
             ->with($this->equalTo($emailIdentity));