39 lines
1.4 KiB
Python
39 lines
1.4 KiB
Python
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import numpy as np
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import pytest
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from pandas import Index, MultiIndex
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class TestIndexConstructor:
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# Tests for the Index constructor, specifically for cases that do
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# not return a subclass
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@pytest.mark.parametrize("value", [1, np.int64(1)])
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def test_constructor_corner(self, value):
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# corner case
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msg = (
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r"Index\(\.\.\.\) must be called with a collection of some "
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f"kind, {value} was passed"
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)
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with pytest.raises(TypeError, match=msg):
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Index(value)
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@pytest.mark.parametrize("index_vals", [[("A", 1), "B"], ["B", ("A", 1)]])
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def test_construction_list_mixed_tuples(self, index_vals):
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# see gh-10697: if we are constructing from a mixed list of tuples,
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# make sure that we are independent of the sorting order.
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index = Index(index_vals)
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assert isinstance(index, Index)
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assert not isinstance(index, MultiIndex)
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def test_constructor_wrong_kwargs(self):
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# GH #19348
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with pytest.raises(TypeError, match="Unexpected keyword arguments {'foo'}"):
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Index([], foo="bar")
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@pytest.mark.xfail(reason="see GH#21311: Index doesn't enforce dtype argument")
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def test_constructor_cast(self):
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msg = "could not convert string to float"
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with pytest.raises(ValueError, match=msg):
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Index(["a", "b", "c"], dtype=float)
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