48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
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import pytest
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import pandas as pd
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import pandas.util.testing as tm
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from pandas.core.internals import ExtensionBlock
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from .base import BaseExtensionTests
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class BaseConstructorsTests(BaseExtensionTests):
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def test_array_from_scalars(self, data):
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scalars = [data[0], data[1], data[2]]
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result = data._from_sequence(scalars)
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assert isinstance(result, type(data))
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def test_series_constructor(self, data):
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result = pd.Series(data)
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assert result.dtype == data.dtype
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assert len(result) == len(data)
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assert isinstance(result._data.blocks[0], ExtensionBlock)
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assert result._data.blocks[0].values is data
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# Series[EA] is unboxed / boxed correctly
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result2 = pd.Series(result)
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assert result2.dtype == data.dtype
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assert isinstance(result2._data.blocks[0], ExtensionBlock)
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@pytest.mark.parametrize("from_series", [True, False])
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def test_dataframe_constructor_from_dict(self, data, from_series):
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if from_series:
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data = pd.Series(data)
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result = pd.DataFrame({"A": data})
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assert result.dtypes['A'] == data.dtype
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assert result.shape == (len(data), 1)
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assert isinstance(result._data.blocks[0], ExtensionBlock)
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def test_dataframe_from_series(self, data):
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result = pd.DataFrame(pd.Series(data))
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assert result.dtypes[0] == data.dtype
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assert result.shape == (len(data), 1)
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assert isinstance(result._data.blocks[0], ExtensionBlock)
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def test_series_given_mismatched_index_raises(self, data):
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msg = 'Length of passed values is 3, index implies 5'
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with tm.assert_raises_regex(ValueError, msg):
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pd.Series(data[:3], index=[0, 1, 2, 3, 4])
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