raise excplicit error when referencing non-existant environmenmt.

jones/client.py

@@ -14,11 +14,16 @@
 limitations under the License.
 """
 
-import socket
 from collections import Mapping
+from kazoo.exceptions import NoNodeException
+
+import socket
 import json
 
 
+class EnvironmentNotFoundException(Exception): pass
+
+
 class JonesClient(Mapping):
     """An example client for accessing config stored by Jones.
 
@@ -53,7 +58,10 @@ def _deserialize(d):
                 return {}
             return dict(l.split(' -> ') for l in d.split('\n'))
 
-        nodemap, stat = self.zk.get(self.nodemap_path, self._get_config)
+        try:
+            nodemap, stat = self.zk.get(self.nodemap_path, self._get_config)
+        except NoNodeException:
+            raise EnvironmentNotFoundException()
 
         try:
             conf_path = _deserialize(nodemap)[self.hostname]

setup.py

@@ -16,7 +16,7 @@
 
 from setuptools import setup
 
-VERSION = '0.4'
+VERSION = '0.4.1'
 NAME = 'jones'
 
 install_requires = [

tests/test_client.py

@@ -19,7 +19,7 @@
 
 from tests import fixture
 from jones.jones import Jones
-from jones.client import JonesClient
+from jones.client import JonesClient, EnvironmentNotFoundException
 from kazoo.testing import KazooTestCase
 
 
@@ -63,6 +63,10 @@ def test_default_value(self):
         self.assertEquals(self.jones_client.get('a'), fixture.CHILD1['a'])
         self.assertEquals(self.jones_client.get('notinhere', 1), 1)
 
+    def test_raises_with_no_environment(self):
+        with self.assertRaises(EnvironmentNotFoundException):
+            JonesClient(self.client, 'newservice')
+
     def test_responds_to_remap(self):
         """test that changing the associations updates config properly."""