isbn-verifier: update tests to v2.4.0 (#1373)

* Replace test case - "invalid character in isbn"
* Add test case with only 9 digits

exercises/isbn-verifier/isbn_verifier_test.py

@@ -3,7 +3,7 @@
 from isbn_verifier import verify
 
 
-# Tests adapted from `problem-specifications//canonical-data.json` @ v2.2.0
+# Tests adapted from `problem-specifications//canonical-data.json` @ v2.4.0
 
 class IsbnVerifierTests(unittest.TestCase):
 
@@ -20,7 +20,7 @@ def test_invalid_check_digit_other_than_X(self):
         self.assertIs(verify('3-598-21507-A'), False)
 
     def test_invalid_character_in_isbn(self):
-        self.assertIs(verify('3-598-2K507-0'), False)
+        self.assertIs(verify('3-598-P1581-X'), False)
 
     def test_invalid_X_other_than_check_digit(self):
         self.assertIs(verify('3-598-2X507-9'), False)
@@ -49,6 +49,9 @@ def test_invalid_check_digit_X_used_for_0(self):
     def test_valid_empty_isbn(self):
         self.assertIs(verify(''), False)
 
+    def test_input_is_nine_characters(self):
+        self.assertIs(verify('134456729'), False)
+
 
 if __name__ == '__main__':
     unittest.main()