Add get_notifications json schema + tests

Add a schema that corresponds to our response for returning lists
of notifications, and test with a contract test.

app/v2/notifications/notification_schemas.py

@@ -72,6 +72,36 @@ get_notification_response = {
     ]
 }
 
+get_notifications_response = {
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "description": "GET list of notifications response schema",
+    "type": "object",
+    "properties": {
+        "notifications": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "ref": get_notification_response
+            }
+        },
+        "links": {
+            "type": "object",
+            "properties": {
+                "current": {
+                    "type": "string"
+                },
+                "next": {
+                    "type": "string"
+                }
+            },
+            "additionalProperties": False,
+            "required": ["current"]
+        }
+    },
+    "additionalProperties": False,
+    "required": ["notifications", "links"]
+}
+
 post_sms_request = {
     "$schema": "http://json-schema.org/draft-04/schema#",
     "description": "POST sms notification schema",

tests/app/public_contracts/test_GET_notification.py

@@ -1,7 +1,7 @@
 from . import return_json_from_response, validate_v0, validate
 from app.models import ApiKey, KEY_TYPE_NORMAL
 from app.dao.api_key_dao import save_model_api_key
-from app.v2.notifications.notification_schemas import get_notification_response
+from app.v2.notifications.notification_schemas import get_notification_response, get_notifications_response
 from tests import create_authorization_header
 
 
@@ -16,6 +16,8 @@ def _get_notification(client, notification, url):
     return client.get(url, headers=[auth_header])
 
 
+# v2
+
 def test_get_v2_sms_contract(client, sample_notification):
     response_json = return_json_from_response(_get_notification(
         client, sample_notification, '/v2/notifications/{}'.format(sample_notification.id)
@@ -30,6 +32,15 @@ def test_get_v2_email_contract(client, sample_email_notification):
     validate(response_json, get_notification_response)
 
 
+def test_get_v2_notifications_contract(client, sample_notification):
+    response_json = return_json_from_response(_get_notification(
+        client, sample_notification, '/v2/notifications'
+    ))
+    validate(response_json, get_notifications_response)
+
+
+# v0
+
 def test_get_api_sms_contract(client, sample_notification):
     response_json = return_json_from_response(_get_notification(
         client, sample_notification, '/notifications/{}'.format(sample_notification.id)