isogram: update tests to v1.7.0 (exercism#1606)

Nishant23 · cmccandless · commit 273b377ab4b4 · 2018-12-04T08:10:23.000-05:00
Closes exercism#1586
diff --git a/exercises/isogram/isogram_test.py b/exercises/isogram/isogram_test.py
@@ -3,7 +3,7 @@
 from isogram import is_isogram
 
 
-# Tests adapted from `problem-specifications//canonical-data.json` @ v1.6.0
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.7.0
 
 class IsogramTest(unittest.TestCase):
 
@@ -31,6 +31,9 @@ def test_word_with_duplicated_letter_in_mixed_case_lowercase_first(self):
     def test_hypothetical_isogrammic_word_with_hyphen(self):
         self.assertIs(is_isogram("thumbscrew-japingly"), True)
 
+    def test_hypothetical_word_with_duplicate_character_following_hyphen(self):
+        self.assertIs(is_isogram("thumbscrew-jappingly"), False)
+
     def test_isogram_with_duplicated_hyphen(self):
         self.assertIs(is_isogram("six-year-old"), True)
 
