Fix TypeError

Fix TypeError thrown while calling InvalidSchemaError

Change-Id: I4527afe05258a200ce932ed0bec86613abd25920
Closes-Bug: 1563542

toscaparser/elements/constraints.py

@@ -388,17 +388,16 @@ class InRange(Constraint):
                 InvalidSchemaError(message=_('The property "in_range" '
                                              'expects a list.')))
 
+        msg = _('The property "in_range" expects comparable values.')
         for value in self.constraint_value:
             if not isinstance(value, self.valid_types):
                 ExceptionCollector.appendException(
-                    InvalidSchemaError(_('The property "in_range" expects '
-                                         'comparable values.')))
+                    InvalidSchemaError(message=msg))
             # The only string we allow for range is the special value
             # 'UNBOUNDED'
             if(isinstance(value, str) and value != self.UNBOUNDED):
                 ExceptionCollector.appendException(
-                    InvalidSchemaError(_('The property "in_range" expects '
-                                         'comparable values.')))
+                    InvalidSchemaError(message=msg))
 
         self.min = self.constraint_value[0]
         self.max = self.constraint_value[1]

toscaparser/tests/test_datatypes.py

@@ -68,8 +68,14 @@ class DataTypeTest(TestCase):
       properties:
         temperature:
           type: range
+          required: false
           constraints:
             - in_range: [-256, UNBOUNDED]
+        humidity:
+          type: range
+          required: false
+          constraints:
+            - in_range: [-256, INFINITY]
     '''
     custom_type_def = yamlparser.simple_parse(custom_type_schema)
 
@@ -380,6 +386,18 @@ class DataTypeTest(TestCase):
                            ),
                          err.__str__())
 
+        value_snippet = '''
+        humidity: [-100, 100]
+        '''
+        value = yamlparser.simple_parse(value_snippet)
+        data = DataEntity('tosca.my.datatypes.TestLab',
+                          value, DataTypeTest.custom_type_def)
+        err = self.assertRaises(exception.InvalidSchemaError,
+                                lambda: data.validate())
+        self.assertEqual(_('The property "in_range" expects comparable values.'
+                           ),
+                         err.__str__())
+
     def test_range_unbounded(self):
         value_snippet = '''
         temperature: [-100, 999999]