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.config;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.atLeastOnce;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoInteractions;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  import static org.mockito.Mockito.when;
  import static org.openqa.selenium.remote.CapabilityType.BROWSER_NAME;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.ImmutableSet;
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.time.Duration;
  import java.util.function.Predicate;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.Capabilities;
  import org.openqa.selenium.ImmutableCapabilities;
  import org.openqa.selenium.WebDriverException;
  import org.openqa.selenium.grid.data.CreateSessionRequest;
  import org.openqa.selenium.grid.node.ActiveSession;
  import org.openqa.selenium.internal.Either;
  import org.openqa.selenium.remote.Dialect;
  import org.openqa.selenium.remote.http.ClientConfig;
  import org.openqa.selenium.remote.http.HttpClient;
  import org.openqa.selenium.remote.http.HttpRequest;
  import org.openqa.selenium.remote.http.HttpResponse;
  import org.openqa.selenium.remote.service.DriverService;
  import org.openqa.selenium.remote.tracing.DefaultTestTracer;
  import org.openqa.selenium.remote.tracing.Tracer;
  
  class DriverServiceSessionFactoryTest {
  
    private Tracer tracer;
    private HttpClient.Factory clientFactory;
    private DriverService.Builder builder;
    private DriverService driverService;
  
    @BeforeEach
    public void setUp() throws MalformedURLException {
      tracer = DefaultTestTracer.createTracer();
  
      clientFactory = mock(HttpClient.Factory.class);
  
      driverService = mock(DriverService.class);
      when(driverService.getUrl()).thenReturn(new URL("http://localhost:1234/"));
  
      builder = mock(DriverService.Builder.class);
      when(builder.build()).thenReturn(driverService);
    }
  
    @Test
    void itDelegatesCapabilitiesTestingToPredicate() {
      DriverServiceSessionFactory factory = factoryFor("chrome", builder);
  
      assertThat(factory.test(toPayload("chrome"))).isTrue();
      assertThat(factory.test(toPayload("firefox"))).isFalse();
  
      verifyNoInteractions(builder);
    }
  
    @Test
    void shouldNotInstantiateSessionIfNoDialectSpecifiedInARequest() {
      DriverServiceSessionFactory factory = factoryFor("chrome", builder);
  
      Either<WebDriverException, ActiveSession> session =
          factory.apply(
              new CreateSessionRequest(ImmutableSet.of(), toPayload("chrome"), ImmutableMap.of()));
  
      assertThat(session.isLeft()).isTrue();
      verifyNoInteractions(builder);
    }
  
    @Test
    void shouldNotInstantiateSessionIfCapabilitiesDoNotMatch() {
      DriverServiceSessionFactory factory = factoryFor("chrome", builder);
  
      Either<WebDriverException, ActiveSession> session =
          factory.apply(
              new CreateSessionRequest(
                  ImmutableSet.of(Dialect.W3C), toPayload("firefox"), ImmutableMap.of()));
  
      assertThat(session.isLeft()).isTrue();
      verifyNoInteractions(builder);
    }
  
    @Test
    void shouldNotInstantiateSessionIfBuilderCanNotBuildService() {
      when(builder.build()).thenThrow(new WebDriverException());
  
      DriverServiceSessionFactory factory = factoryFor("chrome", builder);
  
      Either<WebDriverException, ActiveSession> session =
          factory.apply(
              new CreateSessionRequest(
                  ImmutableSet.of(Dialect.W3C), toPayload("chrome"), ImmutableMap.of()));
  
      assertThat(session.isLeft()).isTrue();
      verify(builder, times(1)).build();
      verifyNoMoreInteractions(builder);
    }
  
    @Test
    void shouldNotInstantiateSessionIfRemoteEndReturnsInvalidResponse() throws IOException {
      HttpClient httpClient = mock(HttpClient.class);
      when(httpClient.execute(any(HttpRequest.class)))
          .thenReturn(
              new HttpResponse()
                  .setStatus(200)
                  .setContent(() -> new ByteArrayInputStream("Hello, world!".getBytes())));
      when(clientFactory.createClient(any(URL.class))).thenReturn(httpClient);
  
      DriverServiceSessionFactory factory = factoryFor("chrome", builder);
  
      Either<WebDriverException, ActiveSession> session =
          factory.apply(
              new CreateSessionRequest(
                  ImmutableSet.of(Dialect.W3C), toPayload("chrome"), ImmutableMap.of()));
  
      assertThat(session.isLeft()).isTrue();
  
      verify(builder, times(1)).build();
      verifyNoMoreInteractions(builder);
      verify(driverService, times(1)).start();
      verify(driverService, atLeastOnce()).getUrl();
      verify(driverService, times(1)).stop();
      verifyNoMoreInteractions(driverService);
    }
  
    @Test
    void shouldInstantiateSessionIfEverythingIsOK() throws IOException {
      HttpClient httpClient = mock(HttpClient.class);
      when(httpClient.execute(any(HttpRequest.class)))
          .thenReturn(
              new HttpResponse()
                  .setStatus(200)
                  .setContent(
                      () ->
                          new ByteArrayInputStream(
                              "{ \"value\": { \"sessionId\": \"1\", \"capabilities\": {} } }"
                                  .getBytes())));
      when(clientFactory.createClient(any(ClientConfig.class))).thenReturn(httpClient);
  
      DriverServiceSessionFactory factory = factoryFor("chrome", builder);
  
      Either<WebDriverException, ActiveSession> session =
          factory.apply(
              new CreateSessionRequest(
                  ImmutableSet.of(Dialect.W3C), toPayload("chrome"), ImmutableMap.of()));
  
      assertThat(session.isRight()).isTrue();
  
      verify(builder, times(1)).build();
      verifyNoMoreInteractions(builder);
      verify(driverService, times(1)).start();
      verify(driverService, atLeastOnce()).getUrl();
      verifyNoMoreInteractions(driverService);
    }
  
    private DriverServiceSessionFactory factoryFor(String browser, DriverService.Builder builder) {
      Predicate<Capabilities> predicate = c -> c.getBrowserName().equals(browser);
      ImmutableCapabilities stereotype = new ImmutableCapabilities(BROWSER_NAME, browser);
      return new DriverServiceSessionFactory(
          tracer, clientFactory, Duration.ofSeconds(300), stereotype, predicate, builder);
    }
  
    private Capabilities toPayload(String browserName) {
      return new ImmutableCapabilities("browserName", browserName);
    }
  }
  