adds push validate endpoint (#177)

Author: aschuman0

urbanairship/core.py

@@ -26,6 +26,7 @@ def __init__(self, location=None):
         self.device_token_url = self.base_url + "device_tokens/"
         self.apid_url = self.base_url + "apids/"
         self.push_url = self.base_url + "push/"
+        self.validate_url = self.push_url + "validate/"
         self.schedules_url = self.base_url + "schedules/"
         self.tags_url = self.base_url + "tags/"
         self.segments_url = self.base_url + "segments/"

urbanairship/push/core.py

@@ -50,6 +50,22 @@ def device_types(self, types):
             )
         self._device_types = types
 
+    def validate(self):
+        """
+        Test push payload against the validate endpoint. No sends will result from this
+        method being called. This method is otherwise identical to the `send` method.
+        """
+
+        response = self._airship._request(
+            method="POST",
+            body=json.dumps(self.payload),
+            url=self._airship.urls.get("validate_url"),
+            content_type="application/json",
+            version=3,
+        )
+
+        return PushResponse(response)
+
     def send(self):
         """Send the notification.