Adding apns-push-type header

test/test_payload.py

@@ -50,6 +50,7 @@ def test_payload():
         },
         'extra': 'something'
     }
+    assert payload.push_type == 'alert'
 
 
 def test_payload_with_payload_alert(payload_alert):
@@ -80,3 +81,21 @@ def test_payload_with_payload_alert(payload_alert):
         },
         'extra': 'something'
     }
+    assert payload.push_type == 'alert'
+
+
+def test_payload_with_background_push_type():
+    payload = Payload(
+        content_available=True, mutable_content=True,
+        category='my_category', url_args='args', custom={'extra': 'something'}, thread_id='42')
+    assert payload.dict() == {
+        'aps': {
+            'content-available': 1,
+            'mutable-content': 1,
+            'thread-id': '42',
+            'category': 'my_category',
+            'url-args': 'args',
+        },
+        'extra': 'something'
+    }
+    assert payload.push_type == 'background'