luhn: update tests to v1.3.0 (exercism#1605)

Nishant23 · cmccandless · commit efcd4af4b4fb · 2018-12-04T08:39:38.000-05:00
Closes exercism#1587
diff --git a/exercises/luhn/luhn_test.py b/exercises/luhn/luhn_test.py
@@ -5,7 +5,7 @@
 from luhn import Luhn
 
 
-# Tests adapted from `problem-specifications//canonical-data.json` @ v1.2.0
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.3.0
 
 class LuhnTest(unittest.TestCase):
     def test_single_digit_strings_can_not_be_valid(self):
@@ -29,6 +29,9 @@ def test_invalid_Canadian_SIN(self):
     def test_invalid_credit_card(self):
         self.assertIs(Luhn("8273 1232 7352 0569").is_valid(), False)
 
+    def test_valid_number_with_an_even_number_of_digits(self):
+        self.assertIs(Luhn("095 245 88").is_valid(), True)
+
     def test_valid_strings_with_a_non_digit_included_become_invalid(self):
         self.assertIs(Luhn("055a 444 285").is_valid(), False)
 
