yacht: add test case "Four of a kind is not a full house" (exercism#1387)

mrcfps · cmccandless · commit ff6f2c03f9c5 · 2018-05-02T14:45:25.000-04:00
Overly simple implementations checking only for two unique numbers will
otherwise pass the test suite.
diff --git a/exercises/yacht/yacht_test.py b/exercises/yacht/yacht_test.py
@@ -4,7 +4,7 @@
 from yacht import score
 
 
-# Tests adapted from `problem-specifications//canonical-data.json` @ v1.0.0
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.1.0
 
 class YachtTests(unittest.TestCase):
     def test_yacht(self):
@@ -46,6 +46,9 @@ def test_full_house_three_small_two_big(self):
     def test_two_pair_is_not_a_full_house(self):
         self.assertEqual(score([2, 2, 4, 4, 5], yacht.FULL_HOUSE), 0)
 
+    def test_four_of_a_kind_is_not_a_full_house(self):
+        self.assertEqual(score([1, 4, 4, 4, 4], yacht.FULL_HOUSE), 0)
+
     def test_yacht_is_not_a_full_house(self):
         self.assertEqual(score([2, 2, 2, 2, 2], yacht.FULL_HOUSE), 0)
 
