Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_cached.py: 49%

1###### Coverage stub 

2import atexit 

3import coverage 

4cov = coverage.coverage(data_file='.coverage', cover_pylib=True) 

5cov.start() 

6# Register an exist handler that will print coverage 

7def exit_handler(): 

8 cov.stop() 

9 cov.save() 

10atexit.register(exit_handler) 

11####### End of coverage stub 

12#!/usr/bin/python3 

13# Copyright 2023 Google LLC 

14# 

15# Licensed under the Apache License, Version 2.0 (the "License"); 

16# you may not use this file except in compliance with the License. 

17# You may obtain a copy of the License at 

18# 

19# http://www.apache.org/licenses/LICENSE-2.0 

20# 

21# Unless required by applicable law or agreed to in writing, software 

22# distributed under the License is distributed on an "AS IS" BASIS, 

23# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

24# See the License for the specific language governing permissions and 

25# limitations under the License. 

26 

27import os 

28import sys 

29import atheris 

30import cachetools 

31import random 

32import datetime 

33from threading import Lock 

34 

35def get_ttu(_key, value, now): 

36 # assume value.ttl contains the item's time-to-live in hours 

37 return datetime.datetime.now() + random.random() * datetime.timedelta(days=200000) 

38 

39def TestOneInput(data): 

40 fdp = atheris.FuzzedDataProvider(data) 

41 

42 cache_size = fdp.ConsumeIntInRange(1,32) 

43 cache_ttl = fdp.ConsumeProbability() 

44 cache_lock = None 

45 if fdp.ConsumeBool(): 

46 cache_lock = Lock() 

47 

48 # Random caching types 

49 CACHE_TYPES = [ 

50 {}, 

51 cachetools.FIFOCache(maxsize=cache_size), 

52 cachetools.LFUCache(maxsize=cache_size), 

53 cachetools.LRUCache(maxsize=cache_size), 

54 cachetools.MRUCache(maxsize=cache_size), 

55 cachetools.RRCache(maxsize=cache_size, choice=random.choice), 

56 cachetools.TTLCache(maxsize=cache_size, ttl=cache_ttl), 

57 cachetools.TLRUCache(maxsize=cache_size, ttu=get_ttu, timer=datetime.datetime.now) 

58 ] 

59 

60 # Generate a random cached function 

61 @cachetools.cached(cache=fdp.PickValueInList(CACHE_TYPES), lock=cache_lock, info=fdp.ConsumeBool()) 

62 def fib(n): 

63 return n if n < 2 else fib(n - 1) + fib(n - 2) 

64 

65 for i in range(20): 

66 fib(fdp.ConsumeIntInRange(1, 20)) 

67 # Try and get coverage of different properties 

68 try: 

69 fib.maxsize() 

70 fib.currsize() 

71 except AttributeError: 

72 pass 

73 

74def main(): 

75 atheris.Setup(sys.argv, TestOneInput) 

76 atheris.Fuzz() 

77 

78if __name__ == "__main__": 

79 atheris.instrument_all() 

80 main()