code: def test_constructor_single_level():
      result = MultiIndex(
          levels=[["foo", "bar", "baz", "qux"]],
          codes=[[0, 1, 2, 3]],
          names=["first"],
      )
      assert isinstance(result, MultiIndex)
      expected = Index(["foo", "bar", "baz", "qux"], name="first")
      tm.assert_index_equal(result.levels[0], expected)
      assert result.names == ["first"]
  
imports: from datetime import date, datetime
  import itertools
  import numpy
  import pytest
  from pandas.core.dtypes.cast import construct_1d_object_array_from_listlike
  import pandas
  from pandas import Index, MultiIndex, Series, Timestamp, date_range
  import pandas._testing
label_desc: Use image node_id 1 for calling a global function with example usage: test_constructor_single_level() without return types