code: def test_interp_invalid_method(self, invalid_method):
      s = Series([1, 3, np.nan, 12, np.nan, 25])
  
      msg = f"method must be one of.* Got '{invalid_method}' instead"
      if invalid_method is None:
          msg = "'method' should be a string, not None"
      with pytest.raises(ValueError, match=msg):
          s.interpolate(method=invalid_method)
  
      # When an invalid method and invalid limit (such as -1) are
      # provided, the error message reflects the invalid method.
      with pytest.raises(ValueError, match=msg):
          s.interpolate(method=invalid_method, limit=-1)
  
imports: import numpy
  import pytest
  import pandas.util._test_decorators
  import pandas
  from pandas import Index, MultiIndex, Series, date_range, isna
  import pandas._testing
label_desc: Use image node_id 20 for calling the TestSeriesInterpolateData obj's underlying member method code with example usage: obj.test_interp_invalid_method(invalid_method) without return types