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):
  
          optional_args = {"transport": "ssh"}
  
          super().__init__(
              hostname, username, password, timeout, optional_args=optional_args
          )
  
          self.patched_attrs = ["device"]
          self.device = FakeEOSDevice()
  
      def _obtain_lock(self, wait_time=None):
          pass
  
      def close(self):
          pass
  
      def open(self):
          pass
  
  
  class FakeEOSDevice(BaseTestDouble):
      """EOS device test double."""
  
      def __init__(self):
          super(FakeEOSDevice, self).__init__()
          self.connection = object()
  
      def send_command_expect(self, command, **kwargs):
          return self.send_config_set([command])
  
      def send_config_set(self, commands, **kwargs):
          return self.run_commands(commands)
  