Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_fileio.py: 47%

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 2022 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 atheris 

28import sys 

29import mock 

30 

31with atheris.instrument_imports(): 

32 from google.cloud.storage.fileio import BlobReader 

33 

34 

35global_data = None 

36def TestOneInput(data): 

37 global_data = data 

38 fdp = atheris.FuzzedDataProvider(data) 

39 

40 blob = mock.Mock() 

41 def read_fuzz_data(start=0, end=None, **_): 

42 return global_data[start:end] 

43 

44 blob.download_as_bytes = mock.Mock(side_effect=read_fuzz_data) 

45 blob.size = len(data) 

46 blob.chunk_size = None 

47 download_kwargs = {"if_metageneration_match": 1} 

48 reader = BlobReader(blob, **download_kwargs) 

49 try: 

50 reader.read(fdp.ConsumeIntInRange(0, len(data)*2)) 

51 except UnicodeDecodeError: 

52 return 

53 

54 reader.seek( 

55 pos = fdp.ConsumeIntInRange(0, len(data)*2), 

56 whence = fdp.ConsumeIntInRange(0, 2) 

57 ) 

58 

59 

60def main(): 

61 atheris.instrument_all() 

62 atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True) 

63 atheris.Fuzz() 

64 

65if __name__ == "__main__": 

66 main()