Fixes error pinned posting info missing when editing as mod

src/Model/Behavior/PostingBehavior.php

@@ -100,6 +100,8 @@ public function updatePosting(Entry $posting, array $data, CurrentUserInterface
 
         /// must be set for validation
         $data['locked'] = $posting->get('locked');
+        $data['fixed'] = $posting->get('fixed');
+
         $data['pid'] = $posting->get('pid');
         $data['time'] = $posting->get('time');
         $data['user_id'] = $posting->get('user_id');

tests/Fixture/EntryFixture.php

@@ -336,7 +336,8 @@ class EntryFixture extends TestFixture
             'time' => '2000-01-01 10:59:00',
             'last_answer' => '2000-01-01 10:59:00',
             'category_id' => 4, // accession = 1
-            'user_id' => 7
+            'user_id' => 7,
+            'fixed' => true,
         ],
         // thread 6
         // -------------------------------------

tests/TestCase/Model/Behavior/PostingBehaviorTest.php

@@ -114,6 +114,39 @@ public function testCreateNewThreadButNoCategoryProvided()
         $this->assertArrayHasKey('_required', $errors['category_id']);
     }
 
+    public function testUpdateSuccesModOnPinnedPosting()
+    {
+        $now = (string)time();
+        $edit = ['subject' => $now];
+
+        $entity = $this->table->findById(11)->first();
+
+        $user = ['id' => 7, 'user_type' => 'mod', 'username' => 'bar'];
+        $user = CurrentUserFactory::createLoggedIn($user);
+
+        $result = $this->table->updatePosting($entity, $edit, $user);
+
+        $this->assertEmpty($result->getErrors());
+        $this->assertEquals($now, $result->get('subject'));
+    }
+
+    public function testUpdateFailureModOnOwnPosting()
+    {
+        $now = (string)time();
+        $edit = ['subject' => $now];
+
+        $entity = $this->table->findById(11)->first();
+        $entity->set('fixed', false);
+
+        $user = ['id' => 7, 'user_type' => 'mod', 'username' => 'bar'];
+        $user = CurrentUserFactory::createLoggedIn($user);
+
+        $result = $this->table->updatePosting($entity, $edit, $user);
+
+        $errors = $result->getErrors();
+        $this->assertArrayHasKey('isEditingAllowed', $errors['edited_by']);
+    }
+
     public function testPrepareChildPosting()
     {
         $parent = [