X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/08697512e84abaa87be93fa61ac30937d24d4364..9b755b94aa2c8847ffca607de239f5c3bca9984b:/pypol/tests/test_domains.py

diff --git a/pypol/tests/test_domains.py b/pypol/tests/test_domains.py
index e4f996c..9cb3a98 100644
--- a/pypol/tests/test_domains.py
+++ b/pypol/tests/test_domains.py
@@ -1,3 +1,20 @@
+# Copyright 2014 MINES ParisTech
+#
+# This file is part of Linpy.
+#
+# Linpy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Linpy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Linpy.  If not, see <http://www.gnu.org/licenses/>.
+
 import unittest
 
 from ..domains import *
@@ -104,7 +121,8 @@ class TestDomain(unittest.TestCase):
 
     def test_sample(self):
         self.assertEqual(self.square6.sample(), {Symbol('x'): 1, Symbol('y'): 3})
-        self.assertEqual(self.empty.sample(), None)
+        with self.assertRaises(ValueError):
+            self.empty.sample()
         self.assertEqual(self.universe.sample(), {})
 
     def test_intersection(self):