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"""
Tests for the following offsets:
- YearBegin
- YearEnd
"""
from __future__ import annotations
from datetime import datetime
import numpy as np
import pytest
from pandas import Timestamp
from pandas.tests.tseries.offsets.common import (
assert_is_on_offset,
assert_offset_equal,
)
from pandas.tseries.offsets import (
YearBegin,
YearEnd,
)
class TestYearBegin:
def test_misspecified(self):
with pytest.raises(ValueError, match="Month must go from 1 to 12"):
YearBegin(month=13)
offset_cases = []
offset_cases.append(
(
YearBegin(),
{
datetime(2008, 1, 1): datetime(2009, 1, 1),
datetime(2008, 6, 30): datetime(2009, 1, 1),
datetime(2008, 12, 31): datetime(2009, 1, 1),
datetime(2005, 12, 30): datetime(2006, 1, 1),
datetime(2005, 12, 31): datetime(2006, 1, 1),
},
)
)
offset_cases.append(
(
YearBegin(0),
{
datetime(2008, 1, 1): datetime(2008, 1, 1),
datetime(2008, 6, 30): datetime(2009, 1, 1),
datetime(2008, 12, 31): datetime(2009, 1, 1),
datetime(2005, 12, 30): datetime(2006, 1, 1),
datetime(2005, 12, 31): datetime(2006, 1, 1),
},
)
)
offset_cases.append(
(
YearBegin(3),
{
datetime(2008, 1, 1): datetime(2011, 1, 1),
datetime(2008, 6, 30): datetime(2011, 1, 1),
datetime(2008, 12, 31): datetime(2011, 1, 1),
datetime(2005, 12, 30): datetime(2008, 1, 1),
datetime(2005, 12, 31): datetime(2008, 1, 1),
},
)
)
offset_cases.append(
(
YearBegin(-1),
{
datetime(2007, 1, 1): datetime(2006, 1, 1),
datetime(2007, 1, 15): datetime(2007, 1, 1),
datetime(2008, 6, 30): datetime(2008, 1, 1),
datetime(2008, 12, 31): datetime(2008, 1, 1),
datetime(2006, 12, 29): datetime(2006, 1, 1),
datetime(2006, 12, 30): datetime(2006, 1, 1),
datetime(2007, 1, 1): datetime(2006, 1, 1),
},
)
)
offset_cases.append(
(
YearBegin(-2),
{
datetime(2007, 1, 1): datetime(2005, 1, 1),
datetime(2008, 6, 30): datetime(2007, 1, 1),
datetime(2008, 12, 31): datetime(2007, 1, 1),
},
)
)
offset_cases.append(
(
YearBegin(month=4),
{
datetime(2007, 4, 1): datetime(2008, 4, 1),
datetime(2007, 4, 15): datetime(2008, 4, 1),
datetime(2007, 3, 1): datetime(2007, 4, 1),
datetime(2007, 12, 15): datetime(2008, 4, 1),
datetime(2012, 1, 31): datetime(2012, 4, 1),
},
)
)
offset_cases.append(
(
YearBegin(0, month=4),
{
datetime(2007, 4, 1): datetime(2007, 4, 1),
datetime(2007, 3, 1): datetime(2007, 4, 1),
datetime(2007, 12, 15): datetime(2008, 4, 1),
datetime(2012, 1, 31): datetime(2012, 4, 1),
},
)
)
offset_cases.append(
(
YearBegin(4, month=4),
{
datetime(2007, 4, 1): datetime(2011, 4, 1),
datetime(2007, 4, 15): datetime(2011, 4, 1),
datetime(2007, 3, 1): datetime(2010, 4, 1),
datetime(2007, 12, 15): datetime(2011, 4, 1),
datetime(2012, 1, 31): datetime(2015, 4, 1),
},
)
)
offset_cases.append(
(
YearBegin(-1, month=4),
{
datetime(2007, 4, 1): datetime(2006, 4, 1),
datetime(2007, 3, 1): datetime(2006, 4, 1),
datetime(2007, 12, 15): datetime(2007, 4, 1),
datetime(2012, 1, 31): datetime(2011, 4, 1),
},
)
)
offset_cases.append(
(
YearBegin(-3, month=4),
{
datetime(2007, 4, 1): datetime(2004, 4, 1),
datetime(2007, 3, 1): datetime(2004, 4, 1),
datetime(2007, 12, 15): datetime(2005, 4, 1),
datetime(2012, 1, 31): datetime(2009, 4, 1),
},
)
)
@pytest.mark.parametrize("case", offset_cases)
def test_offset(self, case):
offset, cases = case
for base, expected in cases.items():
assert_offset_equal(offset, base, expected)
on_offset_cases = [
(YearBegin(), datetime(2007, 1, 3), False),
(YearBegin(), datetime(2008, 1, 1), True),
(YearBegin(), datetime(2006, 12, 31), False),
(YearBegin(), datetime(2006, 1, 2), False),
]
@pytest.mark.parametrize("case", on_offset_cases)
def test_is_on_offset(self, case):
offset, dt, expected = case
assert_is_on_offset(offset, dt, expected)
class TestYearEnd:
def test_misspecified(self):
with pytest.raises(ValueError, match="Month must go from 1 to 12"):
YearEnd(month=13)
offset_cases = []
offset_cases.append(
(
YearEnd(),
{
datetime(2008, 1, 1): datetime(2008, 12, 31),
datetime(2008, 6, 30): datetime(2008, 12, 31),
datetime(2008, 12, 31): datetime(2009, 12, 31),
datetime(2005, 12, 30): datetime(2005, 12, 31),
datetime(2005, 12, 31): datetime(2006, 12, 31),
},
)
)
offset_cases.append(
(
YearEnd(0),
{
datetime(2008, 1, 1): datetime(2008, 12, 31),
datetime(2008, 6, 30): datetime(2008, 12, 31),
datetime(2008, 12, 31): datetime(2008, 12, 31),
datetime(2005, 12, 30): datetime(2005, 12, 31),
},
)
)
offset_cases.append(
(
YearEnd(-1),
{
datetime(2007, 1, 1): datetime(2006, 12, 31),
datetime(2008, 6, 30): datetime(2007, 12, 31),
datetime(2008, 12, 31): datetime(2007, 12, 31),
datetime(2006, 12, 29): datetime(2005, 12, 31),
datetime(2006, 12, 30): datetime(2005, 12, 31),
datetime(2007, 1, 1): datetime(2006, 12, 31),
},
)
)
offset_cases.append(
(
YearEnd(-2),
{
datetime(2007, 1, 1): datetime(2005, 12, 31),
datetime(2008, 6, 30): datetime(2006, 12, 31),
datetime(2008, 12, 31): datetime(2006, 12, 31),
},
)
)
@pytest.mark.parametrize("case", offset_cases)
def test_offset(self, case):
offset, cases = case
for base, expected in cases.items():
assert_offset_equal(offset, base, expected)
on_offset_cases = [
(YearEnd(), datetime(2007, 12, 31), True),
(YearEnd(), datetime(2008, 1, 1), False),
(YearEnd(), datetime(2006, 12, 31), True),
(YearEnd(), datetime(2006, 12, 29), False),
]
@pytest.mark.parametrize("case", on_offset_cases)
def test_is_on_offset(self, case):
offset, dt, expected = case
assert_is_on_offset(offset, dt, expected)
class TestYearEndDiffMonth:
offset_cases = []
offset_cases.append(
(
YearEnd(month=3),
{
datetime(2008, 1, 1): datetime(2008, 3, 31),
datetime(2008, 2, 15): datetime(2008, 3, 31),
datetime(2008, 3, 31): datetime(2009, 3, 31),
datetime(2008, 3, 30): datetime(2008, 3, 31),
datetime(2005, 3, 31): datetime(2006, 3, 31),
datetime(2006, 7, 30): datetime(2007, 3, 31),
},
)
)
offset_cases.append(
(
YearEnd(0, month=3),
{
datetime(2008, 1, 1): datetime(2008, 3, 31),
datetime(2008, 2, 28): datetime(2008, 3, 31),
datetime(2008, 3, 31): datetime(2008, 3, 31),
datetime(2005, 3, 30): datetime(2005, 3, 31),
},
)
)
offset_cases.append(
(
YearEnd(-1, month=3),
{
datetime(2007, 1, 1): datetime(2006, 3, 31),
datetime(2008, 2, 28): datetime(2007, 3, 31),
datetime(2008, 3, 31): datetime(2007, 3, 31),
datetime(2006, 3, 29): datetime(2005, 3, 31),
datetime(2006, 3, 30): datetime(2005, 3, 31),
datetime(2007, 3, 1): datetime(2006, 3, 31),
},
)
)
offset_cases.append(
(
YearEnd(-2, month=3),
{
datetime(2007, 1, 1): datetime(2005, 3, 31),
datetime(2008, 6, 30): datetime(2007, 3, 31),
datetime(2008, 3, 31): datetime(2006, 3, 31),
},
)
)
@pytest.mark.parametrize("case", offset_cases)
def test_offset(self, case):
offset, cases = case
for base, expected in cases.items():
assert_offset_equal(offset, base, expected)
on_offset_cases = [
(YearEnd(month=3), datetime(2007, 3, 31), True),
(YearEnd(month=3), datetime(2008, 1, 1), False),
(YearEnd(month=3), datetime(2006, 3, 31), True),
(YearEnd(month=3), datetime(2006, 3, 29), False),
]
@pytest.mark.parametrize("case", on_offset_cases)
def test_is_on_offset(self, case):
offset, dt, expected = case
assert_is_on_offset(offset, dt, expected)
def test_add_out_of_pydatetime_range():
# GH#50348 don't raise in Timestamp.replace
ts = Timestamp(np.datetime64("-20000-12-31"))
off = YearEnd()
result = ts + off
# TODO(cython3): "arg: datetime" annotation will impose
# datetime limitations on Timestamp. The fused type below works in cy3
# ctypedef fused datetimelike:
# _Timestamp
# datetime
# expected = Timestamp(np.datetime64("-19999-12-31"))
# assert result == expected
assert result.year in (-19999, 1973)
assert result.month == 12
assert result.day == 31