monkey patching

amosio · amosio · commit 5f2a1f38f2fe · 2020-08-17T14:48:03.000+02:00
diff --git a/python3/koans/about_dice_project.py b/python3/koans/about_dice_project.py
@@ -5,6 +5,7 @@
 
 import random
 
+
 class DiceSet:
     def __init__(self):
         self._values = None
@@ -16,8 +17,10 @@ def values(self):
     def roll(self, n):
         # Needs implementing!
         # Tip: random.randint(min, max) can be used to generate random numbers
+        # random
         pass
 
+
 class AboutDiceProject(Koan):
     def test_can_create_a_dice_set(self):
         dice = DiceSet()
@@ -30,7 +33,8 @@ def test_rolling_the_dice_returns_a_set_of_integers_between_1_and_6(self):
         self.assertTrue(isinstance(dice.values, list), "should be a list")
         self.assertEqual(5, len(dice.values))
         for value in dice.values:
-            self.assertTrue(value >= 1 and value <= 6, "value " + str(value) + " must be between 1 and 6")
+            self.assertTrue(value >= 1 and value <= 6, "value " +
+                            str(value) + " must be between 1 and 6")
 
     def test_dice_values_do_not_change_unless_explicitly_rolled(self):
         dice = DiceSet()
@@ -48,8 +52,8 @@ def test_dice_values_should_change_between_rolls(self):
         dice.roll(5)
         second_time = dice.values
 
-        self.assertNotEqual(first_time, second_time, \
-            "Two rolls should not be equal")
+        self.assertNotEqual(first_time, second_time,
+                            "Two rolls should not be equal")
 
         # THINK ABOUT IT:
         #
diff --git a/python3/koans/about_monkey_patching.py b/python3/koans/about_monkey_patching.py
@@ -7,25 +7,26 @@
 
 from runner.koan import *
 
+
 class AboutMonkeyPatching(Koan):
     class Dog:
         def bark(self):
             return "WOOF"
 
     def test_as_defined_dogs_do_bark(self):
         fido = self.Dog()
-        self.assertEqual(__, fido.bark())
+        self.assertEqual("WOOF", fido.bark())
 
     # ------------------------------------------------------------------
 
-    # Add a new method to an existing class.
+    # Add a new method to an ex isting class.
     def test_after_patching_dogs_can_both_wag_and_bark(self):
         def wag(self): return "HAPPY"
         self.Dog.wag = wag
 
         fido = self.Dog()
-        self.assertEqual(__, fido.wag())
-        self.assertEqual(__, fido.bark())
+        self.assertEqual("HAPPY", fido.wag())
+        self.assertEqual("WOOF", fido.bark())
 
     # ------------------------------------------------------------------
 
@@ -35,14 +36,15 @@ def test_most_built_in_classes_cannot_be_monkey_patched(self):
         except Exception as ex:
             err_msg = ex.args[0]
 
-        self.assertRegex(err_msg, __)
+        self.assertRegex(err_msg, "built-in")
 
     # ------------------------------------------------------------------
 
-    class MyInt(int): pass
+    class MyInt(int):
+        pass
 
     def test_subclasses_of_built_in_classes_can_be_be_monkey_patched(self):
         self.MyInt.is_even = lambda self: (self % 2) == 0
 
-        self.assertEqual(__, self.MyInt(1).is_even())
-        self.assertEqual(__, self.MyInt(2).is_even())
+        self.assertEqual(False, self.MyInt(1).is_even())
+        self.assertEqual(True, self.MyInt(2).is_even())
