docstr: Test running with a benchmark file.
          
docstr_tok: ["Test","running","with","a","benchmark","file","."]
code: def test_benchmark_file(self):
      """Test running with a benchmark file."""
      csv_file_path = self.tmpdir.getpath("b.csv")
      with open(csv_file_path, "w") as csv_file:
          csv_file.write(
              "date,return\n"
              "2020-01-03 00:00:00+00:00,-0.1\n"
              "2020-01-06 00:00:00+00:00,0.333\n"
              "2020-01-07 00:00:00+00:00,0.167\n"
              "2020-01-08 00:00:00+00:00,0.143\n"
              "2020-01-09 00:00:00+00:00,6.375\n"
          )
  
      spec = BenchmarkSpec.from_cli_params(
          no_benchmark=False,
          benchmark_sid=None,
          benchmark_symbol=None,
          benchmark_file=csv_file_path,
      )
  
      sid, returns = self.resolve_spec(spec)
  
      self.assertIs(sid, None)
  
      expected_dates = pd.to_datetime(
          [
              "2020-01-03",
              "2020-01-06",
              "2020-01-07",
              "2020-01-08",
              "2020-01-09",
          ],
          utc=True,
      )
      expected_values = [-0.1, 0.333, 0.167, 0.143, 6.375]
      expected_returns = pd.Series(
          index=expected_dates, data=expected_values
      )
  
      assert_series_equal(returns, expected_returns, check_names=False)
  
      warnings = self.logs_at_level(logbook.WARNING)
      expected = []
      assert_equal(warnings, expected)
  
imports: import logbook
  import numpy
  import pandas
  from pandas.util.testing import assert_series_equal
  from zipline.data.data_portal import DataPortal
  from zipline.errors import BenchmarkAssetNotAvailableTooEarly, BenchmarkAssetNotAvailableTooLate, InvalidBenchmarkAsset
  from zipline.sources.benchmark_source import BenchmarkSource
  from zipline.utils.run_algo import BenchmarkSpec
  from zipline.testing import MockDailyBarReader, create_minute_bar_data, parameter_space, tmp_bcolz_equity_minute_bar_reader
  from zipline.testing.predicates import assert_equal
  from zipline.testing.fixtures import WithAssetFinder, WithDataPortal, WithSimParams, WithTmpDir, WithTradingCalendars, ZiplineTestCase
  from zipline.testing.core import make_test_handler
label_desc: Use image node_id 10 for calling the BenchmarkSpecTestCase obj's underlying member method code with example usage: obj.test_benchmark_file() without return types