def METHOD_NAME(self):
    property_filename = getattr(self, 'filename', 'example-data-properties.xlsx')
    tax_lot_filename = getattr(self, 'filename', 'example-data-taxlots.xlsx')
    import_file_source_type = ASSESSED_RAW
    self.fake_portfolio_mappings = FAKE_MAPPINGS['portfolio']
    self.fake_taxlot_mappings = FAKE_MAPPINGS['taxlot']
    self.fake_extra_data = FAKE_EXTRA_DATA
    self.fake_row = FAKE_ROW
    selfvars = self.set_up(import_file_source_type)
    (self.user,
     self.org,
     self.import_file_property,
     self.import_record_property,
     self.import_file_tax_lot,
     self.import_record_tax_lot,
     self.cycle) = selfvars
    filepath = osp.join(osp.dirname(__file__), '..', 'data', tax_lot_filename)
    self.import_file_tax_lot.file = SimpleUploadedFile(
        name=tax_lot_filename,
        content=pathlib.Path(filepath).read_bytes()
    )
    self.import_file_tax_lot.save()
    filepath = osp.join(osp.dirname(__file__), '..', 'data', property_filename)
    self.import_file_property.file = SimpleUploadedFile(
        name=property_filename,
        content=pathlib.Path(filepath).read_bytes()
    )
    self.import_file_property.save()