Current File : //lib/python3/dist-packages/twisted/python/test/strategies.py
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Hypothesis strategies for values related to L{twisted.python}.
"""
from hypothesis.strategies import SearchStrategy, characters, text
from typing import Literal
def systemdDescriptorNames() -> SearchStrategy[str]:
"""
Build strings that are legal values for the systemd
I{FileDescriptorName} field.
"""
# systemd.socket(5) says:
#
# > Names may contain any ASCII character, but must exclude control
# > characters and ":", and must be at most 255 characters in length.
control_characters: Literal["Cc"] = "Cc"
return text(
# The docs don't say there is a min size so I'm guessing...
min_size=1,
max_size=255,
alphabet=characters(
# These constraints restrict us to ASCII.
min_codepoint=0,
max_codepoint=127,
# This one excludes control characters.
blacklist_categories=(control_characters,),
# And this excludes the separator.
blacklist_characters=(":",),
),
)
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