Align with using Pandora's ParameterMissing exception for ValueErrors.

2 files changed, 6 insertions, 5 deletions

diff --git a/pandora/client.py b/pandora/client.py
index fafd872..4a8a26d 100644
--- a/pandora/client.py
+++ b/pandora/client.py
@@ -262,8 +262,8 @@ class APIClient(BaseAPIClient):
         from .models.pandora import AdItem
 
         if not station_id:
-            raise ValueError("The 'station_id' param must be defined, "
-                             "got: '{}'".format(station_id))
+            raise errors.ParameterMissing("The 'station_id' param must be "
+                                          "defined, got: '{}'".format(station_id))
 
         ad_metadata = self.get_ad_metadata(ad_token)
         ad_metadata["stationId"] = station_id
diff --git a/pandora/models/pandora.py b/pandora/models/pandora.py
index 6abd3a7..3a901e5 100644
--- a/pandora/models/pandora.py
+++ b/pandora/models/pandora.py
@@ -1,6 +1,7 @@
 from .. import BaseAPIClient
 from . import with_metaclass, ModelMetaClass
 from . import Field, PandoraModel, PandoraListModel, PandoraDictListModel
+from ..errors import ParameterMissing
 
 
 class Station(PandoraModel):
@@ -231,13 +232,13 @@ class AdItem(PlaylistModel):
         if self.tracking_tokens:
             self._api_client.register_ad(station_id, self.tracking_tokens)
         else:
-            raise ValueError('No ad tracking tokens available for '
-                             'registration.')
+            raise ParameterMissing('No ad tracking tokens available '
+                                          'for registration.')
 
     def prepare_playback(self):
         try:
             self.register_ad(self.station_id)
-        except ValueError as e:
+        except ParameterMissing as e:
             if not self.tracking_tokens:
                 # Ignore registration attempts if no ad tracking tokens are
                 # available