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;
  
  import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.testing.JupiterTestBase;
  
  public class NoSuchShadowRootTest extends JupiterTestBase {
  
    @Test
    public void getNoSuchShadowRoot() {
      driver.get(pages.shadowRootPage);
      WebElement nonExistentShadowRootElement = driver.findElement(By.id("noShadowRoot"));
      assertThatExceptionOfType(NoSuchShadowRootException.class)
          .isThrownBy(() -> nonExistentShadowRootElement.getShadowRoot());
    }
  }
  