Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_mime.py: 60%

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 os 

28import sys 

29import atheris 

30 

31with atheris.instrument_imports(enable_loader_override=False): 

32 from xdg import Mime 

33 from xdg.Exceptions import ParsingError 

34 

35@atheris.instrument_func 

36def TestOneInput(input_bytes): 

37 # We need to make the file an absolute path 

38 testfile_path = os.path.join(os.getcwd(), "testfile.tmp") 

39 with open(testfile_path, "wb") as f: 

40 f.write(input_bytes) 

41 

42 # Test basic Mime API 

43 Mime.get_type2(testfile_path) 

44 Mime.get_type_by_contents(testfile_path) 

45 Mime.get_type_by_data(input_bytes) 

46 

47 # Test GlobDB 

48 globs = Mime.GlobDB() 

49 try: 

50 globs.merge_file(testfile_path) 

51 globs.merge_file(testfile_path) 

52 except UnicodeError as e: 

53 pass 

54 except ValueError as e: 

55 if ( 

56 "not enough values to unpack" in str(e) or 

57 "invalid literal for int" in str(e) 

58 ): 

59 pass 

60 else: 

61 raise e 

62 

63 # Test MagicDB 

64 magic = Mime.MagicDB() 

65 try: 

66 magic.merge_file(testfile_path) 

67 magic.finalise() 

68 except UnicodeDecodeError: 

69 pass 

70 except (OSError, ValueError) as e: 

71 msg = str(e) 

72 if ( 

73 "Not a MIME magic file" in msg or 

74 "Malformed section heading" in msg 

75 ): 

76 pass 

77 else: 

78 raise e 

79 

80 # Cleanup 

81 os.remove(testfile_path) 

82 

83 

84def main(): 

85 atheris.instrument_all() 

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

87 atheris.Fuzz() 

88 

89 

90if __name__ == "__main__": 

91 main()