class_docstr: Common tests for all variations of IntervalIndex construction. Input data
  to be supplied in breaks format, then converted by the subclass method
  get_kwargs_from_breaks to the expected format.
code: def test_constructor_categorical_valid(
      self, constructor, cat_constructor
  ):
      # GH 21243/21253
  
      breaks = np.arange(10, dtype="int64")
      expected = IntervalIndex.from_breaks(breaks)
  
      cat_breaks = cat_constructor(breaks)
      result_kwargs = self.get_kwargs_from_breaks(cat_breaks)
      result = constructor(**result_kwargs)
      tm.assert_index_equal(result, expected)
  
imports: from functools import partial
  import numpy
  import pytest
  import pandas.util._test_decorators
  from pandas.core.dtypes.common import is_unsigned_integer_dtype
  from pandas.core.dtypes.dtypes import IntervalDtype
  from pandas import Categorical, CategoricalDtype, CategoricalIndex, Index, Interval, IntervalIndex, date_range, notna, period_range, timedelta_range
  import pandas._testing
  from pandas.core.arrays import IntervalArray
  import pandas.core.common
label_desc: Use image node_id 7 for calling the ConstructorTests obj's underlying member method code with example usage: obj.test_constructor_categorical_valid(constructor, cat_constructor) without return types