1# -*- coding: utf-8 -*- 2# Copyright 2017 Christoph Reiter 3# 4# Permission is hereby granted, free of charge, to any person obtaining 5# a copy of this software and associated documentation files (the 6# "Software"), to deal in the Software without restriction, including 7# without limitation the rights to use, copy, modify, merge, publish, 8# distribute, sublicense, and/or sell copies of the Software, and to 9# permit persons to whom the Software is furnished to do so, subject to 10# the following conditions: 11# 12# The above copyright notice and this permission notice shall be included 13# in all copies or substantial portions of the Software. 14# 15# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 18# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 19# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 20# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 21# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 22 23import os 24import sys 25 26from hypothesis.strategies import composite, sampled_from, lists, \ 27 integers, binary, randoms 28 29 30class _PathLike(object): 31 32 def __init__(self, value): 33 self._value = value 34 35 def __fspath__(self): 36 return self._value 37 38 39@composite 40def fspaths(draw, allow_pathlike=True): 41 """A hypothesis strategy which gives valid path values. 42 43 Valid path values are everything which when passed to open() will not raise 44 ValueError or TypeError (but might raise OSError due to file system or 45 operating system restrictions). 46 47 Args: 48 allow_pathlike (bool): 49 If the result can be a pathlike (see :class:`os.PathLike`) 50 """ 51 52 s = [] 53 54 if os.name == "nt": 55 if sys.version_info[0] == 3: 56 unichr_ = chr 57 else: 58 unichr_ = unichr 59 60 hight_surrogate = integers( 61 min_value=0xD800, max_value=0xDBFF).map(lambda i: unichr_(i)) 62 low_surrogate = integers( 63 min_value=0xDC00, max_value=0xDFFF).map(lambda i: unichr_(i)) 64 uni_char = integers( 65 min_value=1, max_value=sys.maxunicode).map(lambda i: unichr_(i)) 66 any_char = sampled_from([ 67 draw(uni_char), draw(hight_surrogate), draw(low_surrogate)]) 68 any_text = lists(any_char).map(lambda l: u"".join(l)) 69 70 windows_path_text = any_text 71 s.append(windows_path_text) 72 73 def text_to_bytes(path): 74 fs_enc = sys.getfilesystemencoding() 75 try: 76 return path.encode(fs_enc, "surrogatepass") 77 except UnicodeEncodeError: 78 return path.encode(fs_enc, "replace") 79 80 windows_path_bytes = windows_path_text.map(text_to_bytes) 81 s.append(windows_path_bytes) 82 else: 83 unix_path_bytes = binary().map(lambda b: b.replace(b"\x00", b" ")) 84 s.append(unix_path_bytes) 85 86 if sys.version_info[0] == 3: 87 unix_path_text = unix_path_bytes.map( 88 lambda b: b.decode( 89 sys.getfilesystemencoding(), "surrogateescape")) 90 else: 91 unix_path_text = unix_path_bytes.map( 92 lambda b: b.decode( 93 sys.getfilesystemencoding(), "ignore")) 94 95 r = draw(randoms()) 96 97 def shuffle_text(t): 98 l = list(t) 99 r.shuffle(l) 100 return u"".join(l) 101 102 s.append(unix_path_text.map(shuffle_text)) 103 104 result = draw(sampled_from(list(map(draw, s)))) 105 106 if allow_pathlike and hasattr(os, "fspath"): 107 result = draw(sampled_from([result, _PathLike(result)])) 108 109 return result 110