code: def test_hint(self):
      pdf1 = pd.DataFrame(
          {"lkey": ["foo", "bar", "baz", "foo"], "value": [1, 2, 3, 5]}
      ).set_index("lkey")
      pdf2 = pd.DataFrame(
          {"rkey": ["foo", "bar", "baz", "foo"], "value": [5, 6, 7, 8]}
      ).set_index("rkey")
      psdf1 = ps.from_pandas(pdf1)
      psdf2 = ps.from_pandas(pdf2)
  
      hints = [
          "broadcast",
          "merge",
          "shuffle_hash",
          "shuffle_replicate_nl",
      ]
  
      for hint in hints:
          self.assert_eq(
              pdf1.merge(
                  pdf2, left_index=True, right_index=True
              ).sort_values(["value_x", "value_y"]),
              psdf1.merge(
                  psdf2.spark.hint(hint),
                  left_index=True,
                  right_index=True,
              ).sort_values(["value_x", "value_y"]),
              almost=True,
          )
          self.assert_eq(
              pdf1.merge(
                  pdf2 + 1, left_index=True, right_index=True
              ).sort_values(["value_x", "value_y"]),
              psdf1.merge(
                  (psdf2 + 1).spark.hint(hint),
                  left_index=True,
                  right_index=True,
              ).sort_values(["value_x", "value_y"]),
              almost=True,
          )
  
file_path: spark/python/pyspark/pandas/tests/test_frame_spark.py
imports: import os
  import pandas
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 2 for calling the SparkFrameMethodsTestsMixin obj's underlying member method code with example usage: obj.test_hint() without return types