import pytest
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from pandas import (
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Interval,
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Timedelta,
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Timestamp,
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)
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@pytest.fixture(
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params=[
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(Timedelta("0 days"), Timedelta("1 day")),
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(Timestamp("2018-01-01"), Timedelta("1 day")),
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(0, 1),
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],
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ids=lambda x: type(x[0]).__name__,
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)
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def start_shift(request):
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"""
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Fixture for generating intervals of types from a start value and a shift
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value that can be added to start to generate an endpoint
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"""
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return request.param
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class TestOverlaps:
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def test_overlaps_self(self, start_shift, closed):
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start, shift = start_shift
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interval = Interval(start, start + shift, closed)
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assert interval.overlaps(interval)
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def test_overlaps_nested(self, start_shift, closed, other_closed):
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start, shift = start_shift
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interval1 = Interval(start, start + 3 * shift, other_closed)
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interval2 = Interval(start + shift, start + 2 * shift, closed)
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# nested intervals should always overlap
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assert interval1.overlaps(interval2)
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def test_overlaps_disjoint(self, start_shift, closed, other_closed):
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start, shift = start_shift
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interval1 = Interval(start, start + shift, other_closed)
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interval2 = Interval(start + 2 * shift, start + 3 * shift, closed)
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# disjoint intervals should never overlap
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assert not interval1.overlaps(interval2)
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def test_overlaps_endpoint(self, start_shift, closed, other_closed):
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start, shift = start_shift
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interval1 = Interval(start, start + shift, other_closed)
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interval2 = Interval(start + shift, start + 2 * shift, closed)
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# overlap if shared endpoint is closed for both (overlap at a point)
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result = interval1.overlaps(interval2)
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expected = interval1.closed_right and interval2.closed_left
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assert result == expected
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@pytest.mark.parametrize(
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"other",
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[10, True, "foo", Timedelta("1 day"), Timestamp("2018-01-01")],
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ids=lambda x: type(x).__name__,
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)
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def test_overlaps_invalid_type(self, other):
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interval = Interval(0, 1)
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msg = f"`other` must be an Interval, got {type(other).__name__}"
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with pytest.raises(TypeError, match=msg):
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interval.overlaps(other)
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