content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * Licensed 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
   *
   * https://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 io.aeron.test;
  
  import org.junit.jupiter.api.extension.AfterEachCallback;
  import org.junit.jupiter.api.extension.BeforeEachCallback;
  import org.junit.jupiter.api.extension.ExtensionContext;
  
  import java.io.PrintStream;
  
  public class HideStdErrExtension implements BeforeEachCallback, AfterEachCallback
  {
      private final PrintStream nullPrintStream = new PrintStream(new NullOutputStream());
      private PrintStream originalStream = null;
  
      public void beforeEach(final ExtensionContext context)
      {
          if (context.getTestMethod().isPresent() &&
              null != context.getTestMethod().get().getAnnotation(IgnoreStdErr.class))
          {
              originalStream = System.err;
              System.setErr(nullPrintStream);
          }
      }
  
      public void afterEach(final ExtensionContext context)
      {
          if (null != originalStream)
          {
              System.setErr(originalStream);
              originalStream = null;
          }
      }
  }
  