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393 lines
11 KiB
393 lines
11 KiB
"""
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Tests for offsets.Tick and subclasses
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"""
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from datetime import (
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datetime,
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timedelta,
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)
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from hypothesis import (
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assume,
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example,
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given,
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)
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import numpy as np
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import pytest
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from pandas._libs.tslibs.offsets import delta_to_tick
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from pandas import (
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Timedelta,
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Timestamp,
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)
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import pandas._testing as tm
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from pandas._testing._hypothesis import INT_NEG_999_TO_POS_999
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from pandas.tests.tseries.offsets.common import assert_offset_equal
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from pandas.tseries import offsets
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from pandas.tseries.offsets import (
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Hour,
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Micro,
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Milli,
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Minute,
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Nano,
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Second,
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)
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# ---------------------------------------------------------------------
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# Test Helpers
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tick_classes = [Hour, Minute, Second, Milli, Micro, Nano]
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# ---------------------------------------------------------------------
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def test_apply_ticks():
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result = offsets.Hour(3)._apply(offsets.Hour(4))
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exp = offsets.Hour(7)
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assert result == exp
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def test_delta_to_tick():
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delta = timedelta(3)
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tick = delta_to_tick(delta)
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assert tick == offsets.Day(3)
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td = Timedelta(nanoseconds=5)
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tick = delta_to_tick(td)
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assert tick == Nano(5)
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@pytest.mark.parametrize("cls", tick_classes)
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@example(n=2, m=3)
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@example(n=800, m=300)
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@example(n=1000, m=5)
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@given(n=INT_NEG_999_TO_POS_999, m=INT_NEG_999_TO_POS_999)
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def test_tick_add_sub(cls, n, m):
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# For all Tick subclasses and all integers n, m, we should have
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# tick(n) + tick(m) == tick(n+m)
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# tick(n) - tick(m) == tick(n-m)
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left = cls(n)
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right = cls(m)
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expected = cls(n + m)
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assert left + right == expected
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assert left._apply(right) == expected
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expected = cls(n - m)
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assert left - right == expected
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@pytest.mark.arm_slow
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@pytest.mark.parametrize("cls", tick_classes)
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@example(n=2, m=3)
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@given(n=INT_NEG_999_TO_POS_999, m=INT_NEG_999_TO_POS_999)
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def test_tick_equality(cls, n, m):
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assume(m != n)
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# tick == tock iff tick.n == tock.n
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left = cls(n)
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right = cls(m)
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assert left != right
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assert not (left == right)
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right = cls(n)
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assert left == right
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assert not (left != right)
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if n != 0:
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assert cls(n) != cls(-n)
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# ---------------------------------------------------------------------
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def test_Hour():
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assert_offset_equal(Hour(), datetime(2010, 1, 1), datetime(2010, 1, 1, 1))
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assert_offset_equal(Hour(-1), datetime(2010, 1, 1, 1), datetime(2010, 1, 1))
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assert_offset_equal(2 * Hour(), datetime(2010, 1, 1), datetime(2010, 1, 1, 2))
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assert_offset_equal(-1 * Hour(), datetime(2010, 1, 1, 1), datetime(2010, 1, 1))
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assert Hour(3) + Hour(2) == Hour(5)
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assert Hour(3) - Hour(2) == Hour()
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assert Hour(4) != Hour(1)
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def test_Minute():
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assert_offset_equal(Minute(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 1))
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assert_offset_equal(Minute(-1), datetime(2010, 1, 1, 0, 1), datetime(2010, 1, 1))
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assert_offset_equal(2 * Minute(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 2))
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assert_offset_equal(-1 * Minute(), datetime(2010, 1, 1, 0, 1), datetime(2010, 1, 1))
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assert Minute(3) + Minute(2) == Minute(5)
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assert Minute(3) - Minute(2) == Minute()
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assert Minute(5) != Minute()
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def test_Second():
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assert_offset_equal(Second(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 0, 1))
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assert_offset_equal(Second(-1), datetime(2010, 1, 1, 0, 0, 1), datetime(2010, 1, 1))
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assert_offset_equal(
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2 * Second(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 0, 2)
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)
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assert_offset_equal(
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-1 * Second(), datetime(2010, 1, 1, 0, 0, 1), datetime(2010, 1, 1)
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)
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assert Second(3) + Second(2) == Second(5)
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assert Second(3) - Second(2) == Second()
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def test_Millisecond():
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assert_offset_equal(
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Milli(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 0, 0, 1000)
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)
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assert_offset_equal(
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Milli(-1), datetime(2010, 1, 1, 0, 0, 0, 1000), datetime(2010, 1, 1)
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)
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assert_offset_equal(
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Milli(2), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 0, 0, 2000)
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)
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assert_offset_equal(
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2 * Milli(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 0, 0, 2000)
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)
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assert_offset_equal(
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-1 * Milli(), datetime(2010, 1, 1, 0, 0, 0, 1000), datetime(2010, 1, 1)
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)
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assert Milli(3) + Milli(2) == Milli(5)
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assert Milli(3) - Milli(2) == Milli()
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def test_MillisecondTimestampArithmetic():
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assert_offset_equal(
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Milli(), Timestamp("2010-01-01"), Timestamp("2010-01-01 00:00:00.001")
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)
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assert_offset_equal(
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Milli(-1), Timestamp("2010-01-01 00:00:00.001"), Timestamp("2010-01-01")
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)
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def test_Microsecond():
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assert_offset_equal(Micro(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 0, 0, 1))
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assert_offset_equal(
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Micro(-1), datetime(2010, 1, 1, 0, 0, 0, 1), datetime(2010, 1, 1)
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)
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assert_offset_equal(
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2 * Micro(), datetime(2010, 1, 1), datetime(2010, 1, 1, 0, 0, 0, 2)
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)
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assert_offset_equal(
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-1 * Micro(), datetime(2010, 1, 1, 0, 0, 0, 1), datetime(2010, 1, 1)
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)
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assert Micro(3) + Micro(2) == Micro(5)
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assert Micro(3) - Micro(2) == Micro()
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def test_NanosecondGeneric():
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timestamp = Timestamp(datetime(2010, 1, 1))
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assert timestamp.nanosecond == 0
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result = timestamp + Nano(10)
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assert result.nanosecond == 10
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reverse_result = Nano(10) + timestamp
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assert reverse_result.nanosecond == 10
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def test_Nanosecond():
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timestamp = Timestamp(datetime(2010, 1, 1))
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assert_offset_equal(Nano(), timestamp, timestamp + np.timedelta64(1, "ns"))
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assert_offset_equal(Nano(-1), timestamp + np.timedelta64(1, "ns"), timestamp)
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assert_offset_equal(2 * Nano(), timestamp, timestamp + np.timedelta64(2, "ns"))
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assert_offset_equal(-1 * Nano(), timestamp + np.timedelta64(1, "ns"), timestamp)
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assert Nano(3) + Nano(2) == Nano(5)
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assert Nano(3) - Nano(2) == Nano()
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# GH9284
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assert Nano(1) + Nano(10) == Nano(11)
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assert Nano(5) + Micro(1) == Nano(1005)
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assert Micro(5) + Nano(1) == Nano(5001)
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@pytest.mark.parametrize(
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"kls, expected",
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[
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(Hour, Timedelta(hours=5)),
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(Minute, Timedelta(hours=2, minutes=3)),
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(Second, Timedelta(hours=2, seconds=3)),
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(Milli, Timedelta(hours=2, milliseconds=3)),
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(Micro, Timedelta(hours=2, microseconds=3)),
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(Nano, Timedelta(hours=2, nanoseconds=3)),
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],
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)
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def test_tick_addition(kls, expected):
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offset = kls(3)
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td = Timedelta(hours=2)
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for other in [td, td.to_pytimedelta(), td.to_timedelta64()]:
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result = offset + other
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assert isinstance(result, Timedelta)
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assert result == expected
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result = other + offset
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assert isinstance(result, Timedelta)
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assert result == expected
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@pytest.mark.parametrize("cls", tick_classes)
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def test_tick_division(cls):
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off = cls(10)
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assert off / cls(5) == 2
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assert off / 2 == cls(5)
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assert off / 2.0 == cls(5)
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assert off / off.delta == 1
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assert off / off.delta.to_timedelta64() == 1
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assert off / Nano(1) == off.delta / Nano(1).delta
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if cls is not Nano:
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# A case where we end up with a smaller class
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result = off / 1000
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assert isinstance(result, offsets.Tick)
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assert not isinstance(result, cls)
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assert result.delta == off.delta / 1000
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if cls._nanos_inc < Timedelta(seconds=1).value:
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# Case where we end up with a bigger class
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result = off / 0.001
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assert isinstance(result, offsets.Tick)
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assert not isinstance(result, cls)
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assert result.delta == off.delta / 0.001
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def test_tick_mul_float():
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off = Micro(2)
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# Case where we retain type
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result = off * 1.5
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expected = Micro(3)
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assert result == expected
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assert isinstance(result, Micro)
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# Case where we bump up to the next type
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result = off * 1.25
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expected = Nano(2500)
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assert result == expected
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assert isinstance(result, Nano)
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@pytest.mark.parametrize("cls", tick_classes)
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def test_tick_rdiv(cls):
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off = cls(10)
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delta = off.delta
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td64 = delta.to_timedelta64()
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instance__type = ".".join([cls.__module__, cls.__name__])
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msg = (
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"unsupported operand type\\(s\\) for \\/: 'int'|'float' and "
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f"'{instance__type}'"
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)
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with pytest.raises(TypeError, match=msg):
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2 / off
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with pytest.raises(TypeError, match=msg):
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2.0 / off
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assert (td64 * 2.5) / off == 2.5
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if cls is not Nano:
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# skip pytimedelta for Nano since it gets dropped
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assert (delta.to_pytimedelta() * 2) / off == 2
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result = np.array([2 * td64, td64]) / off
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expected = np.array([2.0, 1.0])
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tm.assert_numpy_array_equal(result, expected)
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@pytest.mark.parametrize("cls1", tick_classes)
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@pytest.mark.parametrize("cls2", tick_classes)
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def test_tick_zero(cls1, cls2):
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assert cls1(0) == cls2(0)
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assert cls1(0) + cls2(0) == cls1(0)
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if cls1 is not Nano:
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assert cls1(2) + cls2(0) == cls1(2)
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if cls1 is Nano:
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assert cls1(2) + Nano(0) == cls1(2)
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@pytest.mark.parametrize("cls", tick_classes)
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def test_tick_equalities(cls):
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assert cls() == cls(1)
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@pytest.mark.parametrize("cls", tick_classes)
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def test_tick_offset(cls):
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assert not cls().is_anchored()
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@pytest.mark.parametrize("cls", tick_classes)
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def test_compare_ticks(cls):
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three = cls(3)
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four = cls(4)
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assert three < cls(4)
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assert cls(3) < four
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assert four > cls(3)
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assert cls(4) > three
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assert cls(3) == cls(3)
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assert cls(3) != cls(4)
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@pytest.mark.parametrize("cls", tick_classes)
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def test_compare_ticks_to_strs(cls):
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# GH#23524
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off = cls(19)
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# These tests should work with any strings, but we particularly are
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# interested in "infer" as that comparison is convenient to make in
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# Datetime/Timedelta Array/Index constructors
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assert not off == "infer"
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assert not "foo" == off
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instance_type = ".".join([cls.__module__, cls.__name__])
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msg = (
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"'<'|'<='|'>'|'>=' not supported between instances of "
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f"'str' and '{instance_type}'|'{instance_type}' and 'str'"
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)
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for left, right in [("infer", off), (off, "infer")]:
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with pytest.raises(TypeError, match=msg):
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left < right
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with pytest.raises(TypeError, match=msg):
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left <= right
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with pytest.raises(TypeError, match=msg):
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left > right
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with pytest.raises(TypeError, match=msg):
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left >= right
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@pytest.mark.parametrize("cls", tick_classes)
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def test_compare_ticks_to_timedeltalike(cls):
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off = cls(19)
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td = off.delta
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others = [td, td.to_timedelta64()]
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if cls is not Nano:
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others.append(td.to_pytimedelta())
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for other in others:
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assert off == other
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assert not off != other
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assert not off < other
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assert not off > other
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assert off <= other
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assert off >= other
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