Merge pull request #1645 from erdenezul/inc_cov

add tests to increase code coverage

tests/queryset/queryset.py

@@ -1861,6 +1861,10 @@ class QuerySetTest(unittest.TestCase):
         post = BlogPost(name="Test Post", hits=5, tags=['test'])
         post.save()
 
+        BlogPost.objects.update(hits=11)
+        post.reload()
+        self.assertEqual(post.hits, 11)
+
         BlogPost.objects.update(set__hits=10)
         post.reload()
         self.assertEqual(post.hits, 10)
@@ -1882,6 +1886,12 @@ class QuerySetTest(unittest.TestCase):
         post.reload()
         self.assertTrue('mongo' in post.tags)
 
+        # Push with arrays
+        BlogPost.objects.update(push__tags=['python', 'scala'])
+        post.reload()
+        self.assertTrue('python' in post.tags)
+        self.assertTrue('scala' in post.tags)
+
         BlogPost.objects.update_one(push_all__tags=['db', 'nosql'])
         post.reload()
         self.assertTrue('db' in post.tags and 'nosql' in post.tags)