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TST: Add tests for Categorical.is_dtype_equal against Series #19045

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Jan 3, 2018
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TST: Add tests for Categorical.is_dtype_equal against Series #19045

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13 changes: 12 additions & 1 deletion pandas/tests/categorical/test_dtypes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@

import pandas.util.testing as tm
from pandas.core.dtypes.dtypes import CategoricalDtype
from pandas import Categorical, Index, CategoricalIndex
from pandas import Categorical, Index, CategoricalIndex, Series


class TestCategoricalDtypes(object):
Expand All @@ -30,6 +30,17 @@ def test_is_equal_dtype(self):
CategoricalIndex(c1, categories=list('cab'))))
assert not c1.is_dtype_equal(CategoricalIndex(c1, ordered=True))

# GH 16659
s1 = Series(c1)
s2 = Series(c2)
s3 = Series(c3)
assert c1.is_dtype_equal(s1)
assert c2.is_dtype_equal(s2)
assert c3.is_dtype_equal(s3)
assert c1.is_dtype_equal(s2)
assert not c1.is_dtype_equal(s3)
assert not c1.is_dtype_equal(s1.astype(object))

def test_set_dtype_same(self):
c = Categorical(['a', 'b', 'c'])
result = c._set_dtype(CategoricalDtype(['a', 'b', 'c']))
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