let it go

Finished
11class BowlingGame:
22 def __init__(self):
3 pass
4
3 """
4 Initialize a new bowling game.
5 """
6 self.rolls = []
7
58 def roll(self, pins):
6 pass
7
9 """
10 Record a roll in the game.
11
12 Args:
13 pins (int): Number of pins knocked down in this roll.
14
15 Raises:
16 ValueError: If the number of pins is invalid.
17 """
18 # Edge Case: Invalid pin count
19 if pins < 0 or pins > 10:
20 raise ValueError("Pins must be between 0 and 10")
21
22 # Edge Case: Game already complete
23 if self._is_game_complete():
24 raise ValueError("Game is already complete")
25
26 # Edge Case: Too many pins in a frame (except in special 10th frame cases)
27 if not self._is_valid_roll(pins):
28 raise ValueError("Cannot knock down more than 10 pins in a frame")
29
30 self.rolls.append(pins)
31
32 def _is_valid_roll(self, pins):
33 """
34 Check if a roll is valid given the current game state.
35
36 Args:
37 pins (int): Number of pins knocked down in this roll.
38
39 Returns:
40 bool: True if the roll is valid, False otherwise.
41 """
42 # First, determine which frame and roll we're currently in
43 frame_index, roll_in_frame = self._get_current_frame_and_roll()
44
45 # For frames 1-9 (indices 0-8)
46 if frame_index < 9:
47 if roll_in_frame == 0: # First roll of frame
48 return True # First roll is always valid (0-10 pins)
49 else: # Second roll of frame
50 # Second roll is valid if sum doesn't exceed 10
51 return self.rolls[-1] + pins <= 10
52
53 # For frame 10 (index 9)
54 if frame_index == 9:
55 if roll_in_frame == 0: # First roll of 10th frame
56 return True # First roll is always valid (0-10 pins)
57 elif roll_in_frame == 1: # Second roll of 10th frame
58 # Get the first roll of the 10th frame
59 first_roll_index = self._get_tenth_frame_start_index()
60 first_roll = self.rolls[first_roll_index]
61 if first_roll == 10: # First roll was a strike
62 return True # Second roll can be anything (0-10 pins)
63 else:
64 return first_roll + pins <= 10 # Sum must not exceed 10
65 else: # Third roll of 10th frame
66 # This is a fill ball, so it's always valid (0-10 pins)
67 return True
68
69 # For any frame beyond 10 (shouldn't happen in a valid game)
70 return True
71
72 def _get_current_frame_and_roll(self):
73 """
74 Determine which frame and which roll within that frame we're currently in.
75
76 Returns:
77 tuple: (frame_index, roll_in_frame) where frame_index is 0-9 and roll_in_frame is 0-2
78 """
79 # For no rolls, we're in frame 0, roll 0
80 if len(self.rolls) == 0:
81 return (0, 0)
82
83 # First, check if we're in frames 1-9
84 frame_index = 0
85 roll_count_in_frames = 0
86
87 # Process frames 1-9
88 while frame_index < 9 and roll_count_in_frames < len(self.rolls):
89 if self._is_strike(roll_count_in_frames):
90 # Strike - one roll for this frame
91 if roll_count_in_frames == len(self.rolls) - 1:
92 # This is the current roll
93 return (frame_index, 0)
94 roll_count_in_frames += 1
95 else:
96 # Not a strike - two rolls for this frame
97 if roll_count_in_frames == len(self.rolls) - 1:
98 # This is the first roll of this frame
99 return (frame_index, 0)
100 elif roll_count_in_frames + 1 == len(self.rolls):
101 # This is the second roll of this frame
102 return (frame_index, 1)
103 roll_count_in_frames += 2
104 frame_index += 1
105
106 # If we get here, we're in frame 10 (index 9)
107 # Find where frame 10 starts
108 roll_index = 0
109 frames_completed = 0
110
111 # Process frames 1-9
112 while frames_completed < 9 and roll_index < len(self.rolls):
113 if self._is_strike(roll_index):
114 roll_index += 1
115 else:
116 roll_index += 2
117 frames_completed += 1
118
119 # roll_index now points to the start of frame 10
120 # Calculate which roll we are in frame 10 (0, 1, or 2)
121 roll_in_frame = len(self.rolls) - roll_index - 1
122 return (9, roll_in_frame)
123
124 def _get_tenth_frame_start_index(self):
125 """
126 Get the index of the first roll in the 10th frame.
127
128 Returns:
129 int: Index of the first roll in the 10th frame.
130 """
131 roll_index = 0
132 frames_completed = 0
133
134 # Process frames 1-9
135 while frames_completed < 9 and roll_index < len(self.rolls):
136 if self._is_strike(roll_index):
137 roll_index += 1
138 else:
139 roll_index += 2
140 frames_completed += 1
141
142 return roll_index
143
8144 def score(self):
9 pass
145 """
146 Calculate the total score for the game.
147
148 Returns:
149 int: The total score of the game.
150
151 Raises:
152 ValueError: If the game is not complete or has too many rolls.
153 """
154 # Edge Case: Game not complete
155 if not self._is_game_complete():
156 raise ValueError("Score cannot be taken until the end of the game")
157
158 score = 0
159 roll_index = 0
160
161 # Score frames 1-9
162 for frame in range(9):
163 if roll_index >= len(self.rolls):
164 raise ValueError("Score cannot be taken until the end of the game")
165
166 if self._is_strike(roll_index): # Strike
167 # Edge Case: Not enough rolls for strike bonus
168 if roll_index + 2 >= len(self.rolls):
169 raise ValueError("Score cannot be taken until the end of the game")
170
171 score += 10 + self.rolls[roll_index + 1] + self.rolls[roll_index + 2]
172 roll_index += 1
173 elif self._is_spare(roll_index): # Spare
174 # Edge Case: Not enough rolls for spare bonus
175 if roll_index + 2 >= len(self.rolls):
176 raise ValueError("Score cannot be taken until the end of the game")
177
178 score += 10 + self.rolls[roll_index + 2]
179 roll_index += 2
180 else: # Open frame
181 score += self.rolls[roll_index] + self.rolls[roll_index + 1]
182 roll_index += 2
183
184 # Score 10th frame
185 if roll_index >= len(self.rolls):
186 raise ValueError("Score cannot be taken until the end of the game")
187
188 # For the 10th frame, we just sum all the rolls in the frame
189 # The frame is already complete, so we can just add them up
190 tenth_frame_start = roll_index
191
192 # Count how many rolls are in the 10th frame
193 if self._is_strike(tenth_frame_start):
194 # First roll is a strike
195 if tenth_frame_start + 2 < len(self.rolls):
196 # Add all three rolls
197 score += self.rolls[tenth_frame_start] + self.rolls[tenth_frame_start + 1] + self.rolls[tenth_frame_start + 2]
198 else:
199 # This shouldn't happen if game is complete
200 raise ValueError("Score cannot be taken until the end of the game")
201 elif (tenth_frame_start + 1 < len(self.rolls) and
202 self.rolls[tenth_frame_start] + self.rolls[tenth_frame_start + 1] == 10):
203 # First two rolls are a spare
204 if tenth_frame_start + 2 < len(self.rolls):
205 # Add all three rolls
206 score += self.rolls[tenth_frame_start] + self.rolls[tenth_frame_start + 1] + self.rolls[tenth_frame_start + 2]
207 else:
208 # This shouldn't happen if game is complete
209 raise ValueError("Score cannot be taken until the end of the game")
210 else:
211 # Open frame - just two rolls
212 if tenth_frame_start + 1 < len(self.rolls):
213 score += self.rolls[tenth_frame_start] + self.rolls[tenth_frame_start + 1]
214 else:
215 # This shouldn't happen if game is complete
216 raise ValueError("Score cannot be taken until the end of the game")
217
218 return score
219
220 def _is_strike(self, roll_index):
221 """
222 Check if a roll is a strike.
223
224 Args:
225 roll_index (int): Index of the roll to check.
226
227 Returns:
228 bool: True if the roll is a strike, False otherwise.
229 """
230 return self.rolls[roll_index] == 10
231
232 def _is_spare(self, roll_index):
233 """
234 Check if a frame is a spare.
235
236 Args:
237 roll_index (int): Index of the first roll of the frame.
238
239 Returns:
240 bool: True if the frame is a spare, False otherwise.
241 """
242 if roll_index + 1 >= len(self.rolls):
243 return False
244 return self.rolls[roll_index] + self.rolls[roll_index + 1] == 10
245
246 def _is_game_complete(self):
247 """
248 Check if the game is complete.
249
250 Returns:
251 bool: True if the game is complete, False otherwise.
252 """
253 if len(self.rolls) == 0:
254 return False
255
256 roll_index = 0
257 frames_completed = 0
258
259 # Process frames 1-9
260 while frames_completed < 9 and roll_index < len(self.rolls):
261 if self._is_strike(roll_index):
262 roll_index += 1
263 else:
264 roll_index += 2
265 frames_completed += 1
266
267 # Process 10th frame
268 if frames_completed == 9 and roll_index < len(self.rolls):
269 # First roll of 10th frame exists
270 tenth_frame_start = roll_index
271 roll_index += 1
272
273 # Check if we have a second roll
274 if roll_index < len(self.rolls):
275 # Second roll exists
276 # Check if we need a third roll (strike or spare)
277 if (self.rolls[tenth_frame_start] == 10 or
278 self.rolls[tenth_frame_start] + self.rolls[tenth_frame_start + 1] == 10):
279 # Need a third roll
280 roll_index += 1
281 else:
282 # Open frame - second roll completes frame
283 roll_index += 1
284
285 # Check if we have the required number of rolls
286 frames_completed += 1
287
288 return frames_completed == 10 and roll_index == len(self.rolls)
289
290 # Handled Edge Cases: Negative pins, too many pins in a single roll, too many pins in a frame,
291 # game not complete, too many rolls, not enough rolls for strike bonus,
292 # not enough rolls for spare bonus, incomplete game
Test NameStatus
test_a_spare_followed_by_zeros_is_worth_ten_points
Fail
test_a_spare_in_the_last_frame_gets_a_one_roll_bonus_that_is_counted_once
Fail
test_a_strike_earns_ten_points_in_a_frame_with_a_single_roll
Fail
test_a_strike_in_the_last_frame_gets_a_two_roll_bonus_that_is_counted_once
Fail
test_a_strike_with_the_one_roll_bonus_after_a_spare_in_the_last_frame_does_not_get_a_bonus
Fail
test_all_strikes_is_a_perfect_game
Fail
test_bonus_roll_for_a_spare_in_the_last_frame_must_be_rolled_before_score_can_be_calculated
Fail
test_both_bonus_rolls_for_a_strike_in_the_last_frame_must_be_rolled_before_score_can_be_calculated
Fail
test_cannot_roll_after_bonus_roll_for_spare
Fail
test_cannot_roll_after_bonus_rolls_for_strike
Fail
test_cannot_roll_if_game_already_has_ten_frames
Fail
test_consecutive_spares_each_get_a_one_roll_bonus
Fail
test_consecutive_strikes_each_get_the_two_roll_bonus
Fail
test_last_two_strikes_followed_by_only_last_bonus_with_non_strike_points
Fail
test_points_scored_in_the_roll_after_a_spare_are_counted_twice
Fail
test_points_scored_in_the_two_rolls_after_a_strike_are_counted_twice_as_a_bonus
Fail
test_rolling_a_spare_with_the_two_roll_bonus_does_not_get_a_bonus_roll
Fail
test_second_bonus_roll_after_a_strike_in_the_last_frame_cannot_score_more_than_10_points
Fail
test_should_be_able_to_score_a_game_with_all_zeros
Fail
test_should_be_able_to_score_a_game_with_no_strikes_or_spares
Fail
test_strikes_with_the_two_roll_bonus_do_not_get_bonus_rolls
Fail
test_the_second_bonus_rolls_after_a_strike_in_the_last_frame_cannot_be_a_strike_if_the_first_one_is_not_a_strike
Fail
test_two_bonus_rolls_after_a_strike_in_the_last_frame_can_score_more_than_10_points_if_one_is_a_strike
Fail
test_two_bonus_rolls_after_a_strike_in_the_last_frame_cannot_score_more_than_10_points
Fail
test_two_rolls_in_a_frame_cannot_score_more_than_10_points
Fail
test_a_roll_cannot_score_more_than_10_points
Pass
test_an_incomplete_game_cannot_be_scored
Pass
test_an_unstarted_game_cannot_be_scored
Pass
test_bonus_roll_after_a_strike_in_the_last_frame_cannot_score_more_than_10_points
Pass
test_bonus_rolls_for_a_strike_in_the_last_frame_must_be_rolled_before_score_can_be_calculated
Pass
test_rolls_cannot_score_negative_points
Pass

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