GH1383 Add support for creating Series/Index with dtype='category'

Author: loicdiridollou

tests/series/test_properties.py

@@ -53,7 +53,6 @@ def test_dt_property() -> None:
 
 def test_array_property() -> None:
     """Test that Series.array returns ExtensionArray and its subclasses"""
-    # casting due to pandas-dev/pandas-stubs#1383
     check(
         assert_type(
             pd.Series([1], dtype="category").array,

tests/series/test_series.py

@@ -2914,8 +2914,6 @@ def test_astype_categorical(cast_arg: CategoryDtypeArg, target_type: type) -> No
         # pandas category
         assert_type(s.astype(pd.CategoricalDtype()), "pd.Series[pd.CategoricalDtype]")
         assert_type(s.astype(cast_arg), "pd.Series[pd.CategoricalDtype]")
-        # pyarrow dictionary
-        # assert_type(s.astype("dictionary[pyarrow]"), "pd.Series[Categorical]")
 
 
 @pytest.mark.parametrize("cast_arg, target_type", ASTYPE_OBJECT_ARGS, ids=repr)