Convert BoundedInt value from json into int

Wsme doesn't convert automaticaly the value of a UserType into
its basetype. This changeset do it

Change-Id: I7402e144e6a337bbed13789c1611a163bbf9ba61

ceilometer/api/controllers/v2.py

@@ -82,6 +82,10 @@ class BoundedInt(wtypes.UserType):
         self.min = min
         self.max = max
 
+    @staticmethod
+    def frombasetype(value):
+        return int(value) if value is not None else None
+
     def validate(self, value):
         if self.min is not None and value < self.min:
             error = _('Value %(value)s is invalid (should be greater or equal '

tests/api/v2/test_alarm_scenarios.py

@@ -285,8 +285,8 @@ class TestAlarms(FunctionalTest,
                 'comparison_operator': 'le',
                 'statistic': 'count',
                 'threshold': 50,
-                'evaluation_periods': 3,
-                'period': 180,
+                'evaluation_periods': '3',
+                'period': '180',
             }
         }
         self.post_json('/alarms', params=json, status=201,
@@ -296,6 +296,9 @@ class TestAlarms(FunctionalTest,
         json['threshold_rule']['query'].append({
             'field': 'project_id', 'op': 'eq',
             'value': self.auth_headers['X-Project-Id']})
+        # to check to BoundedInt type convertion
+        json['threshold_rule']['evaluation_periods'] = 3
+        json['threshold_rule']['period'] = 180
         if alarms[0].name == 'added_alarm':
             for key in json:
                 if key.endswith('_rule'):

tests/api/v2/test_wsme_custom_type.py

@@ -29,6 +29,14 @@ class TestWsmeCustomType(base.TestCase):
         super(TestWsmeCustomType, self).setUp()
         pecan.response = mock.MagicMock()
 
+    def test_bounded_int_convertion(self):
+        bi = v2.BoundedInt(1, 5)
+        self.assertEqual(bi.frombasetype("2"), 2)
+
+    def test_bounded_int_invalid_convertion(self):
+        bi = v2.BoundedInt(1, 5)
+        self.assertRaises(TypeError, bi.frombasetype, wsme)
+
     def test_bounded_int_maxmin(self):
         bi = v2.BoundedInt(1, 5)
         self.assertRaises(wsme.exc.ClientSideError, bi.validate, -1)