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.bidi;
  
  import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
  import static org.assertj.core.api.AssertionsForClassTypes.assertThatExceptionOfType;
  
  import java.util.Collections;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.TimeoutException;
  import org.openqa.selenium.WindowType;
  import org.openqa.selenium.firefox.FirefoxDriver;
  import org.openqa.selenium.firefox.FirefoxOptions;
  import org.openqa.selenium.testing.drivers.Browser;
  
  class BiDiSessionCleanUpTest {
  
    private FirefoxDriver driver;
  
    @Test
    void shouldNotCloseBiDiSessionIfOneWindowIsClosed() {
      FirefoxOptions options = (FirefoxOptions) Browser.FIREFOX.getCapabilities();
      // Enable BiDi
      options.setCapability("webSocketUrl", true);
  
      driver = new FirefoxDriver(options);
  
      BiDi biDi = driver.getBiDi();
  
      BiDiSessionStatus status =
          biDi.send(new Command<>("session.status", Collections.emptyMap(), BiDiSessionStatus.class));
      assertThat(status).isNotNull();
      assertThat(status.getMessage()).isEqualTo("Session already started");
  
      driver.switchTo().newWindow(WindowType.WINDOW);
      driver.switchTo().newWindow(WindowType.TAB);
      driver.switchTo().newWindow(WindowType.TAB);
  
      driver.close();
  
      BiDiSessionStatus statusAfterClosing =
          biDi.send(new Command<>("session.status", Collections.emptyMap(), BiDiSessionStatus.class));
      assertThat(statusAfterClosing).isNotNull();
      assertThat(status.getMessage()).isEqualTo("Session already started");
      driver.quit();
    }
  
    @Test
    void shouldCloseBiDiSessionIfLastWindowIsClosed() {
      FirefoxOptions options = (FirefoxOptions) Browser.FIREFOX.getCapabilities();
      // Enable BiDi
      options.setCapability("webSocketUrl", true);
  
      driver = new FirefoxDriver(options);
  
      BiDi biDi = driver.getBiDi();
  
      BiDiSessionStatus status =
          biDi.send(new Command<>("session.status", Collections.emptyMap(), BiDiSessionStatus.class));
      assertThat(status).isNotNull();
      assertThat(status.getMessage()).isEqualTo("Session already started");
  
      driver.close();
  
      // Closing the last top-level browsing context, closes the WebDriver and BiDi session
      assertThatExceptionOfType(TimeoutException.class)
          .isThrownBy(
              () ->
                  biDi.send(
                      new Command<>(
                          "session.status", Collections.emptyMap(), BiDiSessionStatus.class)));
    }
  }
  