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import numpy as np
import pytest
from pandas import (
Interval,
Timedelta,
Timestamp,
)
@pytest.fixture
def interval():
return Interval(0, 1)
class TestInterval:
def test_properties(self, interval):
assert interval.closed == "right"
assert interval.left == 0
assert interval.right == 1
assert interval.mid == 0.5
def test_hash(self, interval):
# should not raise
hash(interval)
@pytest.mark.parametrize(
"left, right, expected",
[
(0, 5, 5),
(-2, 5.5, 7.5),
(10, 10, 0),
(10, np.inf, np.inf),
(-np.inf, -5, np.inf),
(-np.inf, np.inf, np.inf),
(Timedelta("0 days"), Timedelta("5 days"), Timedelta("5 days")),
(Timedelta("10 days"), Timedelta("10 days"), Timedelta("0 days")),
(Timedelta("1h10min"), Timedelta("5h5min"), Timedelta("3h55min")),
(Timedelta("5s"), Timedelta("1h"), Timedelta("59min55s")),
],
)
def test_length(self, left, right, expected):
# GH 18789
iv = Interval(left, right)
result = iv.length
assert result == expected
@pytest.mark.parametrize(
"left, right, expected",
[
("2017-01-01", "2017-01-06", "5 days"),
("2017-01-01", "2017-01-01 12:00:00", "12 hours"),
("2017-01-01 12:00", "2017-01-01 12:00:00", "0 days"),
("2017-01-01 12:01", "2017-01-05 17:31:00", "4 days 5 hours 30 min"),
],
)
@pytest.mark.parametrize("tz", (None, "UTC", "CET", "US/Eastern"))
def test_length_timestamp(self, tz, left, right, expected):
# GH 18789
iv = Interval(Timestamp(left, tz=tz), Timestamp(right, tz=tz))
result = iv.length
expected = Timedelta(expected)
assert result == expected
@pytest.mark.parametrize(
"left, right",
[
(0, 1),
(Timedelta("0 days"), Timedelta("1 day")),
(Timestamp("2018-01-01"), Timestamp("2018-01-02")),
(
Timestamp("2018-01-01", tz="US/Eastern"),
Timestamp("2018-01-02", tz="US/Eastern"),
),
],
)
def test_is_empty(self, left, right, closed):
# GH27219
# non-empty always return False
iv = Interval(left, right, closed)
assert iv.is_empty is False
# same endpoint is empty except when closed='both' (contains one point)
iv = Interval(left, left, closed)
result = iv.is_empty
expected = closed != "both"
assert result is expected