code: ///////////////////////////////////////////////////////////////////////////////////////////////
  // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
  // Copyright (C) 2001-2023 the original author or authors.
  //
  // This library is free software; you can redistribute it and/or
  // modify it under the terms of the GNU Lesser General Public
  // License as published by the Free Software Foundation; either
  // version 2.1 of the License, or (at your option) any later version.
  //
  // This library is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  // Lesser General Public License for more details.
  //
  // You should have received a copy of the GNU Lesser General Public
  // License along with this library; if not, write to the Free Software
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  ///////////////////////////////////////////////////////////////////////////////////////////////
  
  package com.puppycrawl.tools.checkstyle;
  
  import static org.junit.jupiter.api.Assumptions.assumeFalse;
  
  import java.awt.Component;
  import java.awt.Container;
  import java.awt.GraphicsEnvironment;
  
  import org.junit.jupiter.api.BeforeEach;
  
  /**
   * Abstract base class for testing GUI components.
   */
  public abstract class AbstractGuiTestSupport extends AbstractPathTestSupport {
  
      /**
       * Validates the graphics environment.
       */
      @BeforeEach
      public void validateGraphicsEnvironment() {
          final boolean isHeadless = GraphicsEnvironment.isHeadless();
          assumeFalse(isHeadless, "This test is incompatible with headless environment");
      }
  
      /**
       * Helper method to find a component by its name.
       *
       * @param root the root component to start search
       * @param name the name of component to find
       * @param <T> the type of component to find
       * @return the component if found, {@code null} otherwise
       * @noinspection unchecked
       * @noinspectionreason unchecked - we know that any component is OK to typecast to T
       */
      protected static <T extends Component> T findComponentByName(Component root, String name) {
          Component result = null;
          if (name.equals(root.getName())) {
              result = root;
          }
          else if (root instanceof Container) {
              final Component[] children = ((Container) root).getComponents();
              for (Component component : children) {
                  result = findComponentByName(component, name);
                  if (result != null) {
                      break;
                  }
              }
          }
          return (T) result;
      }
  }
  