content: """Test fixtures."""
  
  from builtins import super
  
  import pytest
  from napalm.base.test import conftest as parent_conftest
  
  from napalm.base.test.double import BaseTestDouble
  
  from napalm.eos import eos
  
  
  @pytest.fixture(scope="class")
  def set_device_parameters(request):
      """Set up the class."""
  
      def fin():
          request.cls.device.close()
  
      request.addfinalizer(fin)
  
      request.cls.driver = eos.EOSDriver
      request.cls.patched_driver = PatchedEOSDriver
      request.cls.vendor = "eos"
      parent_conftest.set_device_parameters(request)
  
  
  def pytest_generate_tests(metafunc):
      """Generate test cases dynamically."""
      parent_conftest.pytest_generate_tests(metafunc, __file__)
  
  
  class PatchedEOSDriver(eos.EOSDriver):
      """Patched EOS Driver."""
  
      def __init__(self, hostname, username, password, timeout=60, optional_args=None):
          super().__init__(hostname, username, password, timeout, optional_args)
  
          self.patched_attrs = ["device"]
          self.device = FakeEOSDevice()
  
  
  class FakeEOSDevice(BaseTestDouble):
      """EOS device test double."""
  
      def __init__(self):
          super(FakeEOSDevice, self).__init__()
          self.connection = object()
  
      def run_commands(self, command_list, encoding="json"):
          """Fake run_commands."""
          result = list()
  
          for command in command_list:
              filename = "{}.{}".format(self.sanitize_text(command), encoding)
              full_path = self.find_file(filename)
  
              if encoding == "json":
                  result.append(self.read_json_file(full_path))
              else:
                  result.append({"output": self.read_txt_file(full_path)})
  
          return result
  