def test_concat_periods(self):
periods = pd.period_range('2000-01-01', periods=10)
coords = [IndexVariable('t', periods[:5]), IndexVariable('t', periods[5:])]
expected = IndexVariable('t', periods)
actual = IndexVariable.concat(coords, dim='t')
assert actual.identical(expected)
assert isinstance(actual.to_index(), pd.PeriodIndex)
positions = [list(range(5)), list(range(5, 10))]
actual = IndexVariable.concat(coords, dim='t', positions=positions)
assert actual.identical(expected)
assert isinstance(actual.to_index(), pd.PeriodIndex)
def test_concat_multiindex(self):
idx = pd.MultiIndex.from_product([[0, 1, 2], ['a', 'b']])
coords = [IndexVariable('x', idx[:2]), IndexVariable('x', idx[2:])]
expected = IndexVariable('x', idx)
actual = IndexVariable.concat(coords, dim='x')
assert actual.identical(expected)
assert isinstance(actual.to_index(), pd.MultiIndex)
