import numpy as np import pytest from pandas import Interval, Period, Timedelta, Timestamp import pandas._testing as tm import pandas.core.common as com @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_repr(self, interval): assert repr(interval) == "Interval(0, 1, closed='right')" assert str(interval) == "(0, 1]" interval_left = Interval(0, 1, closed="left") assert repr(interval_left) == "Interval(0, 1, closed='left')" assert str(interval_left) == "[0, 1)" def test_contains(self, interval): assert 0.5 in interval assert 1 in interval assert 0 not in interval msg = "__contains__ not defined for two intervals" with pytest.raises(TypeError, match=msg): interval in interval interval_both = Interval(0, 1, closed="both") assert 0 in interval_both assert 1 in interval_both interval_neither = Interval(0, 1, closed="neither") assert 0 not in interval_neither assert 0.5 in interval_neither assert 1 not in interval_neither def test_equal(self): assert Interval(0, 1) == Interval(0, 1, closed="right") assert Interval(0, 1) != Interval(0, 1, closed="left") assert Interval(0, 1) != 0 def test_comparison(self): msg = ( "'<' not supported between instances of " "'pandas._libs.interval.Interval' and 'int'" ) with pytest.raises(TypeError, match=msg): Interval(0, 1) < 2 assert Interval(0, 1) < Interval(1, 2) assert Interval(0, 1) < Interval(0, 2) assert Interval(0, 1) < Interval(0.5, 1.5) assert Interval(0, 1) <= Interval(0, 1) assert Interval(0, 1) > Interval(-1, 2) assert Interval(0, 1) >= Interval(0, 1) 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 @pytest.mark.parametrize( "left, right", [ ("a", "z"), (("a", "b"), ("c", "d")), (list("AB"), list("ab")), (Interval(0, 1), Interval(1, 2)), (Period("2018Q1", freq="Q"), Period("2018Q1", freq="Q")), ], ) def test_construct_errors(self, left, right): # GH 23013 msg = "Only numeric, Timestamp and Timedelta endpoints are allowed" with pytest.raises(ValueError, match=msg): Interval(left, right) def test_math_add(self, closed): interval = Interval(0, 1, closed=closed) expected = Interval(1, 2, closed=closed) result = interval + 1 assert result == expected result = 1 + interval assert result == expected result = interval result += 1 assert result == expected msg = r"unsupported operand type\(s\) for \+" with pytest.raises(TypeError, match=msg): interval + interval with pytest.raises(TypeError, match=msg): interval + "foo" def test_math_sub(self, closed): interval = Interval(0, 1, closed=closed) expected = Interval(-1, 0, closed=closed) result = interval - 1 assert result == expected result = interval result -= 1 assert result == expected msg = r"unsupported operand type\(s\) for -" with pytest.raises(TypeError, match=msg): interval - interval with pytest.raises(TypeError, match=msg): interval - "foo" def test_math_mult(self, closed): interval = Interval(0, 1, closed=closed) expected = Interval(0, 2, closed=closed) result = interval * 2 assert result == expected result = 2 * interval assert result == expected result = interval result *= 2 assert result == expected msg = r"unsupported operand type\(s\) for \*" with pytest.raises(TypeError, match=msg): interval * interval msg = r"can\'t multiply sequence by non-int" with pytest.raises(TypeError, match=msg): interval * "foo" def test_math_div(self, closed): interval = Interval(0, 1, closed=closed) expected = Interval(0, 0.5, closed=closed) result = interval / 2.0 assert result == expected result = interval result /= 2.0 assert result == expected msg = r"unsupported operand type\(s\) for /" with pytest.raises(TypeError, match=msg): interval / interval with pytest.raises(TypeError, match=msg): interval / "foo" def test_math_floordiv(self, closed): interval = Interval(1, 2, closed=closed) expected = Interval(0, 1, closed=closed) result = interval // 2 assert result == expected result = interval result //= 2 assert result == expected msg = r"unsupported operand type\(s\) for //" with pytest.raises(TypeError, match=msg): interval // interval with pytest.raises(TypeError, match=msg): interval // "foo" def test_constructor_errors(self): msg = "invalid option for 'closed': foo" with pytest.raises(ValueError, match=msg): Interval(0, 1, closed="foo") msg = "left side of interval must be <= right side" with pytest.raises(ValueError, match=msg): Interval(1, 0) @pytest.mark.parametrize( "tz_left, tz_right", [(None, "UTC"), ("UTC", None), ("UTC", "US/Eastern")] ) def test_constructor_errors_tz(self, tz_left, tz_right): # GH 18538 left = Timestamp("2017-01-01", tz=tz_left) right = Timestamp("2017-01-02", tz=tz_right) if com.any_none(tz_left, tz_right): error = TypeError msg = "Cannot compare tz-naive and tz-aware timestamps" else: error = ValueError msg = "left and right must have the same time zone" with pytest.raises(error, match=msg): Interval(left, right) def test_equality_comparison_broadcasts_over_array(self): # https://github.com/pandas-dev/pandas/issues/35931 interval = Interval(0, 1) arr = np.array([interval, interval]) result = interval == arr expected = np.array([True, True]) tm.assert_numpy_array_equal(result, expected)