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.kafka.streams.processor;
  
  import org.apache.kafka.clients.consumer.ConsumerRecord;
  
  import org.hamcrest.BaseMatcher;
  import org.hamcrest.Description;
  import org.junit.jupiter.api.Test;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  public class WallclockTimestampExtractorTest {
  
      @Test
      public void extractSystemTimestamp() {
          final TimestampExtractor extractor = new WallclockTimestampExtractor();
  
          final long before = System.currentTimeMillis();
          final long timestamp = extractor.extract(new ConsumerRecord<>("anyTopic", 0, 0, null, null), 42);
          final long after = System.currentTimeMillis();
  
          assertThat(timestamp, is(new InBetween(before, after)));
      }
  
      private static class InBetween extends BaseMatcher<Long> {
          private final long before;
          private final long after;
  
          public InBetween(final long before, final long after) {
              this.before = before;
              this.after = after;
          }
  
          @Override
          public boolean matches(final Object item) {
              final long timestamp = (Long) item;
              return before <= timestamp && timestamp <= after;
          }
  
          @Override
          public void describeMismatch(final Object item, final Description mismatchDescription) {}
  
          @Override
          public void describeTo(final Description description) {}
      }
  
  }
  