code: def test_timestamp(self, fixed_now_ts):
      # GH#17329
      # tz-naive --> treat it as if it were UTC for purposes of timestamp()
      ts = fixed_now_ts
      uts = ts.replace(tzinfo=utc)
      assert ts.timestamp() == uts.timestamp()
  
      tsc = Timestamp("2014-10-11 11:00:01.12345678", tz="US/Central")
      utsc = tsc.tz_convert("UTC")
  
      # utsc is a different representation of the same time
      assert tsc.timestamp() == utsc.timestamp()
  
      # datetime.timestamp() converts in the local timezone
      with tm.set_timezone("UTC"):
          # should agree with datetime.timestamp method
          dt = ts.to_pydatetime()
          assert dt.timestamp() == ts.timestamp()
  
imports: from pytz import utc
  from pandas._libs.tslibs import Timestamp
  import pandas.util._test_decorators
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestTimestampMethod obj's underlying member method code with example usage: obj.test_timestamp(fixed_now_ts) without return types