shuffler added as explicit dependency

bridzik.py

@@ -83,15 +83,16 @@ cards = [Card(color, value) for value in Card_values for color in Card_colors]
 
 
 class Bridzik():
-    def __init__(self):
-        self.series = [Series(0, 0)]
+    def __init__(self, shuffler = shuffle):
+        self.shuffler = shuffler
+        self.series = [Series(0, 0, shuffler=self.shuffler)]
 
     def play_card(self, player: int, card: Card):
         if self.is_completed():
             raise BridzikException('Hra je ukoncena.')
         self.series[-1].play_card(player, card)
         if self.series[-1].is_completed() and not self.is_completed():
-            self.series.append(Series(len(self.series)))
+            self.series.append(Series(len(self.series), shuffler=self.shuffler))
 
     def add_player_guess(self, player: int, guess):
         if self.is_completed():
@@ -133,10 +134,11 @@ class Bridzik():
 
 
 class Series():
-    def __init__(self, series_number: int, first_player: int = None):
+    def __init__(self, series_number: int, first_player: int = None, shuffler = shuffle):
         self.series_number = series_number
         self.first_player = first_player if first_player else series_number
         self.rounds = []
+        self.shuffler = shuffler
         self.start_new_round()
 
     def add_player_guess(self, player: int, guess: int):
@@ -179,7 +181,7 @@ class Series():
         if round_number != 0 and not self.get_last_round().is_completed():
             raise BridzikException('Predchadzajuce kolo nie je ukoncene')
         self.rounds.append(
-            Round(round_number, (self.first_player + round_number) % 4)
+            Round(round_number, (self.first_player + round_number) % 4, shuffler=self.shuffler)
         )