content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio;
  
  import java.io.OutputStream;
  import javax.annotation.concurrent.NotThreadSafe;
  
  /**
   * A rule for setting output stream during a test suite. It sets
   * System.err to the specified output stream during the lifetime
   * of this rule.
   */
  @NotThreadSafe
  public final class SystemErrRule extends AbstractResourceRule {
    private RedirectOutputRule mRedirectOutputRule;
  
    public SystemErrRule(OutputStream outputStream) {
      mRedirectOutputRule = new RedirectOutputRule(System.err, outputStream, System::setErr);
    }
  
    @Override
    protected void before() throws Exception {
      mRedirectOutputRule.before();
    }
  
    @Override
    protected void after() {
      mRedirectOutputRule.after();
    }
  }
  