code: def test_simplify_name():
      name = simplify_name(
          "C(Q('events_Chinese New Year_minus_1'), levels=['', 'event'])[T.event]"
      )
      assert name == "events_Chinese New Year-1"
      name = simplify_name(
          "C(Q('str_dow'), levels=['1-Mon', '2-Tue', '3-Wed', '4-Thu', '5-Fri', '6-Sat', '7-Sun'])[T.2-Tue]"
      )
      assert name == "str_dow_2-Tue"
      name = simplify_name("changepoint1_2018_09_02_00")
      assert name == "cp1_2018_09_02_00"
      name = simplify_name("cos1_ct1_yearly_2019_02_05_00")
      assert name == "cos1_ct1_yearly_2019_02_05_00"
      name = simplify_name("no_prefix")
      assert name == "no_prefix"
  
file_path: greykite/greykite/tests/algo/common/test_col_name_utils.py
imports: import pandas
  from greykite.algo.common.col_name_utils import add_category_cols
  from greykite.algo.common.col_name_utils import create_pred_category
  from greykite.algo.common.col_name_utils import filter_coef_summary
  from greykite.algo.common.col_name_utils import simplify_changepoints
  from greykite.algo.common.col_name_utils import simplify_event
  from greykite.algo.common.col_name_utils import simplify_name
  from greykite.algo.common.col_name_utils import simplify_pred_cols
  from greykite.algo.common.col_name_utils import simplify_time_features
label_desc: Use image node_id 4 for calling a global function with example usage: test_simplify_name() without return types