Merge pull request #315 from cloudant/297-changes-since-option

297 changes feed since option

CHANGES.rst

@@ -1,6 +1,7 @@
 2.6.0 (Unreleased)
 ==================
 - [FIXED] Fixed client construction in ``cloudant_bluemix`` context manager.
+- [FIXED] Fixed validation for feed options to accept zero as a valid value.
 
 2.5.0 (2017-07-06)
 ==================

src/cloudant/feed.py

@@ -116,7 +116,7 @@ def _validate(self, key, val, arg_types):
         if (not isinstance(val, arg_types[key]) or
                 (isinstance(val, bool) and int in arg_types[key])):
             raise CloudantArgumentError(117, key, arg_types[key])
-        if isinstance(val, int) and val <= 0 and not isinstance(val, bool):
+        if isinstance(val, int) and val < 0 and not isinstance(val, bool):
             raise CloudantArgumentError(118, key, val)
         if key == 'feed':
             valid_vals = ('continuous', 'normal', 'longpoll')

tests/unit/changes_tests.py

@@ -353,6 +353,20 @@ def test_get_feed_using_since_now(self):
         expected = set(['julia003', 'julia004', 'julia005'])
         self.assertSetEqual(set([x['id'] for x in changes]), expected)
 
+    def test_get_feed_using_since_zero(self):
+        """
+        Test getting content back for a feed using since set to zero
+        """
+        self.populate_db_with_documents(3)
+        feed = Feed(self.db, since=0)
+        changes = list()
+        for change in feed:
+            self.assertSetEqual(set(change.keys()), {'seq', 'changes', 'id'})
+            changes.append(change)
+        expected = set(['julia{0:03d}'.format(i) for i in range(3)])
+        self.assertSetEqual(set([x['id'] for x in changes]), expected)
+        self.assertTrue(str(feed.last_seq).startswith('3'))
+
     def test_get_feed_using_timeout(self):
         """
         Test getting content back for a feed using timeout