Source code for hypothesis.extra.dateutil

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"""
--------------------
hypothesis[dateutil]
--------------------

This module provides ``dateutil`` timezones.

You can use this strategy to make
:py:func:`hypothesis.strategies.datetimes` and
:py:func:`hypothesis.strategies.times` produce timezone-aware values.
"""

from __future__ import absolute_import, division, print_function

import datetime as dt

from dateutil import tz, zoneinfo  # type: ignore

import hypothesis.strategies as st

__all__ = ["timezones"]


[docs]@st.cacheable @st.defines_strategy def timezones(): # type: () -> st.SearchStrategy[dt.tzinfo] """Any timezone in dateutil. This strategy minimises to UTC, or the timezone with the smallest offset from UTC as of 2000-01-01, and is designed for use with :py:func:`~hypothesis.strategies.datetimes`. Note that the timezones generated by the strategy may vary depending on the configuration of your machine. See the dateutil documentation for more information. """ reference_date = dt.datetime(2000, 1, 1) tz_names = zoneinfo.get_zonefile_instance().zones all_timezones = [tz.UTC] # type: ignore all_timezones += sorted( [tz.gettz(t) for t in tz_names], key=lambda zone: abs(zone.utcoffset(reference_date)), ) return st.sampled_from(all_timezones)