content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF 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.apache.beam.runners.dataflow.worker;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.empty;
  import static org.junit.Assert.assertEquals;
  
  import java.util.Set;
  import java.util.logging.Level;
  import java.util.logging.LogRecord;
  import java.util.logging.Logger;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.Sets;
  import org.hamcrest.Matchers;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link LogSaver}. */
  @RunWith(JUnit4.class)
  public class LogSaverTest {
    @Test
    public void testInitialization() {
      LogSaver saver = new LogSaver();
      assertThat(saver.getLogs(), empty());
    }
  
    @Test
    public void testPublishedLogsAreSaved() {
      int numLogsToPublish = 10;
  
      LogSaver saver = new LogSaver();
      Set<LogRecord> records = Sets.newHashSet();
      for (int i = 0; i < numLogsToPublish; i++) {
        LogRecord record = new LogRecord(Level.WARNING, "message #" + i);
        records.add(record);
        saver.publish(record);
      }
  
      assertEquals(records, Sets.newHashSet(saver.getLogs()));
    }
  
    @Test
    public void testJulIntegration() {
      Logger log = Logger.getLogger("any.logger");
      LogSaver saver = new LogSaver();
      log.addHandler(saver);
  
      log.warning("foobar");
      assertThat(saver.getLogs(), Matchers.hasItem(LogRecordMatcher.hasLog(Level.WARNING, "foobar")));
    }
  }
  