code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium.grid.node.docker;
  
  import static java.util.Arrays.asList;
  import static org.assertj.core.api.Assertions.assertThat;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.Optional;
  import java.util.stream.Stream;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.Arguments;
  import org.junit.jupiter.params.provider.MethodSource;
  import org.mockito.Mockito;
  import org.openqa.selenium.docker.Device;
  import org.openqa.selenium.grid.config.Config;
  
  class DockerOptionsTest {
  
    public static Stream<Arguments> data() {
      return Arrays.stream(
              new Object[][] {
                {
                  configuredDeviceMapping(List.of("/dev/kvm:/dev/kvm")),
                  List.of(device("/dev/kvm", "/dev/kvm"))
                },
                {
                  configuredDeviceMapping(List.of("/dev/sda2:/dev/sda2")),
                  List.of(device("/dev/sda2", "/dev/sda2"))
                },
                {
                  configuredDeviceMapping(List.of("/dev/sda:/dev/xvdc:r")),
                  List.of(device("/dev/sda", "/dev/xvdc", "r"))
                },
                {
                  configuredDeviceMapping(asList("/dev/kvm:/dev/kvm", "/dev/bus/usb:/dev/bus/usb:r")),
                  asList(device("/dev/kvm", "/dev/kvm"), device("/dev/bus/usb", "/dev/bus/usb", "r"))
                },
                {
                  configuredDeviceMapping(List.of(" /dev/kvm:/dev/kvm ")),
                  List.of(device("/dev/kvm", "/dev/kvm"))
                }
              })
          .map(Arguments::of);
    }
  
    @ParameterizedTest
    @MethodSource("data")
    void shouldReturnOnlyExpectedDeviceMappings(Config config, List<Device> devicesExpected) {
      List<Device> returnedDevices = new DockerOptions(config).getDevicesMapping();
      assertThat(devicesExpected.equals(returnedDevices))
          .describedAs("Expected %s but was %s", devicesExpected, returnedDevices)
          .isTrue();
    }
  
    private static Device device(String pathOnHost, String pathInContainer) {
      return device(pathOnHost, pathInContainer, "");
    }
  
    private static Device device(
        String pathOnHost, String pathInContainer, String cgroupPermissions) {
      return Device.device(pathOnHost, pathInContainer, cgroupPermissions);
    }
  
    private static Config configuredDeviceMapping(List<String> deviceMapping) {
      Config config = Mockito.mock(Config.class);
      Mockito.when(config.getAll("docker", "devices")).thenReturn(Optional.of(deviceMapping));
      return config;
    }
  }
  