import numpy as np
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from pandas import (
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Index,
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Timedelta,
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timedelta_range,
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)
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import pandas._testing as tm
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class TestJoin:
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def test_append_join_nondatetimeindex(self):
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rng = timedelta_range("1 days", periods=10)
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idx = Index(["a", "b", "c", "d"])
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result = rng.append(idx)
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assert isinstance(result[0], Timedelta)
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# it works
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rng.join(idx, how="outer")
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def test_join_self(self, join_type):
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index = timedelta_range("1 day", periods=10)
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joined = index.join(index, how=join_type)
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tm.assert_index_equal(index, joined)
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def test_does_not_convert_mixed_integer(self):
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df = tm.makeCustomDataframe(
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10,
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10,
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data_gen_f=lambda *args, **kwargs: np.random.randn(),
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r_idx_type="i",
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c_idx_type="td",
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)
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str(df)
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cols = df.columns.join(df.index, how="outer")
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joined = cols.join(df.columns)
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assert cols.dtype == np.dtype("O")
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assert cols.dtype == joined.dtype
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tm.assert_index_equal(cols, joined)
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def test_join_preserves_freq(self):
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# GH#32157
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tdi = timedelta_range("1 day", periods=10)
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result = tdi[:5].join(tdi[5:], how="outer")
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assert result.freq == tdi.freq
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tm.assert_index_equal(result, tdi)
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result = tdi[:5].join(tdi[6:], how="outer")
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assert result.freq is None
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expected = tdi.delete(5)
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tm.assert_index_equal(result, expected)
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