Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/pandas/tests/tslibs/test_timezones.py

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+from datetime import (
+    datetime,
+    timedelta,
+    timezone,
+)
+
+import dateutil.tz
+import pytest
+import pytz
+
+from pandas._libs.tslibs import (
+    conversion,
+    timezones,
+)
+from pandas.compat import is_platform_windows
+
+from pandas import Timestamp
+
+
+def test_is_utc(utc_fixture):
+    tz = timezones.maybe_get_tz(utc_fixture)
+    assert timezones.is_utc(tz)
+
+
+@pytest.mark.parametrize("tz_name", list(pytz.common_timezones))
+def test_cache_keys_are_distinct_for_pytz_vs_dateutil(tz_name):
+    tz_p = timezones.maybe_get_tz(tz_name)
+    tz_d = timezones.maybe_get_tz("dateutil/" + tz_name)
+
+    if tz_d is None:
+        pytest.skip(tz_name + ": dateutil does not know about this one")
+
+    if not (tz_name == "UTC" and is_platform_windows()):
+        # they both end up as tzwin("UTC") on windows
+        assert timezones._p_tz_cache_key(tz_p) != timezones._p_tz_cache_key(tz_d)
+
+
+def test_tzlocal_repr():
+    # see gh-13583
+    ts = Timestamp("2011-01-01", tz=dateutil.tz.tzlocal())
+    assert ts.tz == dateutil.tz.tzlocal()
+    assert "tz='tzlocal()')" in repr(ts)
+
+
+def test_tzlocal_maybe_get_tz():
+    # see gh-13583
+    tz = timezones.maybe_get_tz("tzlocal()")
+    assert tz == dateutil.tz.tzlocal()
+
+
+def test_tzlocal_offset():
+    # see gh-13583
+    #
+    # Get offset using normal datetime for test.
+    ts = Timestamp("2011-01-01", tz=dateutil.tz.tzlocal())
+
+    offset = dateutil.tz.tzlocal().utcoffset(datetime(2011, 1, 1))
+    offset = offset.total_seconds()
+
+    assert ts._value + offset == Timestamp("2011-01-01")._value
+
+
+def test_tzlocal_is_not_utc():
+    # even if the machine running the test is localized to UTC
+    tz = dateutil.tz.tzlocal()
+    assert not timezones.is_utc(tz)
+
+    assert not timezones.tz_compare(tz, dateutil.tz.tzutc())
+
+
+def test_tz_compare_utc(utc_fixture, utc_fixture2):
+    tz = timezones.maybe_get_tz(utc_fixture)
+    tz2 = timezones.maybe_get_tz(utc_fixture2)
+    assert timezones.tz_compare(tz, tz2)
+
+
+@pytest.fixture(
+    params=[
+        (pytz.timezone("US/Eastern"), lambda tz, x: tz.localize(x)),
+        (dateutil.tz.gettz("US/Eastern"), lambda tz, x: x.replace(tzinfo=tz)),
+    ]
+)
+def infer_setup(request):
+    eastern, localize = request.param
+
+    start_naive = datetime(2001, 1, 1)
+    end_naive = datetime(2009, 1, 1)
+
+    start = localize(eastern, start_naive)
+    end = localize(eastern, end_naive)
+
+    return eastern, localize, start, end, start_naive, end_naive
+
+
+def test_infer_tz_compat(infer_setup):
+    eastern, _, start, end, start_naive, end_naive = infer_setup
+
+    assert (
+        timezones.infer_tzinfo(start, end)
+        is conversion.localize_pydatetime(start_naive, eastern).tzinfo
+    )
+    assert (
+        timezones.infer_tzinfo(start, None)
+        is conversion.localize_pydatetime(start_naive, eastern).tzinfo
+    )
+    assert (
+        timezones.infer_tzinfo(None, end)
+        is conversion.localize_pydatetime(end_naive, eastern).tzinfo
+    )
+
+
+def test_infer_tz_utc_localize(infer_setup):
+    _, _, start, end, start_naive, end_naive = infer_setup
+    utc = pytz.utc
+
+    start = utc.localize(start_naive)
+    end = utc.localize(end_naive)
+
+    assert timezones.infer_tzinfo(start, end) is utc
+
+
+@pytest.mark.parametrize("ordered", [True, False])
+def test_infer_tz_mismatch(infer_setup, ordered):
+    eastern, _, _, _, start_naive, end_naive = infer_setup
+    msg = "Inputs must both have the same timezone"
+
+    utc = pytz.utc
+    start = utc.localize(start_naive)
+    end = conversion.localize_pydatetime(end_naive, eastern)
+
+    args = (start, end) if ordered else (end, start)
+
+    with pytest.raises(AssertionError, match=msg):
+        timezones.infer_tzinfo(*args)
+
+
+def test_maybe_get_tz_invalid_types():
+    with pytest.raises(TypeError, match="<class 'float'>"):
+        timezones.maybe_get_tz(44.0)
+
+    with pytest.raises(TypeError, match="<class 'module'>"):
+        timezones.maybe_get_tz(pytz)
+
+    msg = "<class 'pandas._libs.tslibs.timestamps.Timestamp'>"
+    with pytest.raises(TypeError, match=msg):
+        timezones.maybe_get_tz(Timestamp("2021-01-01", tz="UTC"))
+
+
+def test_maybe_get_tz_offset_only():
+    # see gh-36004
+
+    # timezone.utc
+    tz = timezones.maybe_get_tz(timezone.utc)
+    assert tz == timezone(timedelta(hours=0, minutes=0))
+
+    # without UTC+- prefix
+    tz = timezones.maybe_get_tz("+01:15")
+    assert tz == timezone(timedelta(hours=1, minutes=15))
+
+    tz = timezones.maybe_get_tz("-01:15")
+    assert tz == timezone(-timedelta(hours=1, minutes=15))
+
+    # with UTC+- prefix
+    tz = timezones.maybe_get_tz("UTC+02:45")
+    assert tz == timezone(timedelta(hours=2, minutes=45))
+
+    tz = timezones.maybe_get_tz("UTC-02:45")
+    assert tz == timezone(-timedelta(hours=2, minutes=45))