code: def test_series(testlist):
      series = Series(testlist)
      series_pd = pd.Series(testlist)
  
      assert series.is_unique == series_pd.is_unique
      with pytest.warns(FutureWarning):
          expect = series_pd.index.is_monotonic
      with pytest.warns(FutureWarning):
          got = series.index.is_monotonic
      assert got == expect
      assert (
          series.is_monotonic_increasing
          == series_pd.is_monotonic_increasing
      )
      assert (
          series.is_monotonic_decreasing
          == series_pd.is_monotonic_decreasing
      )
  
imports: import numpy
  import pandas
  import pytest
  import cudf
  from cudf import Index, MultiIndex, Series
  from cudf.core.index import CategoricalIndex, DatetimeIndex, GenericIndex, RangeIndex
  from cudf.testing._utils import assert_eq, expect_warning_if
label_desc: Use image node_id 6 for calling a global function with example usage: test_series(testlist) without return types