Return empty list when there are no results to fix Clever#15 w/test

Author: 13rac1

clever/__init__.py

@@ -721,6 +721,9 @@ def iter(cls, auth=None, **params):
 
     while url:
       response, auth = requestor.request('get', url, params)
+      # Generate nothing when there is no data.
+      if len(response['data']) == 0:
+        break
       for datum in convert_to_clever_object(cls, response, auth):
         yield datum
       url = get_link(response, 'next')

test/test_clever.py

@@ -112,6 +112,10 @@ def test_keys_and_values_methods(self):
     self.assertEqual(clever_object.keys(), set())
     self.assertEqual(clever_object.values(), set())
 
+  def test_empty_list_on_no_data(self):
+    district = clever.District.all(where=json.dumps({'name': 'asdf'}))
+    self.assertEqual(district, [])
+
 class AuthenticationErrorTest(CleverTestCase):
 
   def test_invalid_credentials(self):