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(
      self, constructor, breaks_and_expected_subtype, closed, name
  ):
      breaks, expected_subtype = breaks_and_expected_subtype
  
      result_kwargs = self.get_kwargs_from_breaks(breaks, closed)
  
      result = constructor(closed=closed, name=name, **result_kwargs)
  
      assert result.closed == closed
      assert result.name == name
      assert result.dtype.subtype == expected_subtype
      tm.assert_index_equal(
          result.left, Index(breaks[:-1], dtype=expected_subtype)
      )
      tm.assert_index_equal(
          result.right, Index(breaks[1:], dtype=expected_subtype)
      )
  
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 1 for calling the ConstructorTests obj's underlying member method code with example usage: obj.test_constructor(constructor, breaks_and_expected_subtype, closed, name) without return types