code: def test_timestamp_subtraction(self):
      pdf = self.pdf1
      psdf = ps.from_pandas(pdf)
  
      actual = (psdf["end_date"] - psdf["start_date"] - 1)._to_pandas()
      expected = (
          pdf["end_date"] - pdf["start_date"]
      ) // np.timedelta64(1, "s") - 1
      self.assert_eq(actual, expected)
  
      actual = (
          psdf["end_date"] - pd.Timestamp("2012-1-1 12:45:31") - 1
      )._to_pandas()
      expected = (
          pdf["end_date"] - pd.Timestamp("2012-1-1 12:45:31")
      ) // np.timedelta64(1, "s") - 1
      self.assert_eq(actual, expected)
  
      actual = (
          pd.Timestamp("2013-3-11 21:45:00") - psdf["start_date"] - 1
      )._to_pandas()
      expected = (
          pd.Timestamp("2013-3-11 21:45:00") - pdf["start_date"]
      ) // np.timedelta64(1, "s") - 1
      self.assert_eq(actual, expected)
  
imports: import datetime
  import unittest
  import numpy
  import pandas
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 5 for calling the SeriesDateTimeTestsMixin obj's underlying member method code with example usage: obj.test_timestamp_subtraction() without return types