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.kstream;
  
  import org.junit.jupiter.api.Test;
  
  import static java.time.Duration.ofMillis;
  import static org.apache.kafka.streams.EqualityCheck.verifyEquality;
  import static org.apache.kafka.streams.EqualityCheck.verifyInEquality;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class SlidingWindowsTest {
  
      private static final long ANY_SIZE = 123L;
      private static final long ANY_GRACE = 1024L;
  
      @Test
      public void shouldSetTimeDifference() {
          assertEquals(ANY_SIZE, SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(ANY_SIZE), ofMillis(ANY_GRACE)).timeDifferenceMs());
          assertEquals(ANY_SIZE, SlidingWindows.ofTimeDifferenceWithNoGrace(ofMillis(ANY_SIZE)).timeDifferenceMs());
      }
  
      @Test
      public void timeDifferenceMustNotBeNegative() {
          assertThrows(IllegalArgumentException.class, () ->  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(-1), ofMillis(5)));
      }
  
      @Test
      public void shouldSetGracePeriod() {
          assertEquals(ANY_SIZE, SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(10), ofMillis(ANY_SIZE)).gracePeriodMs());
      }
  
      @Test
      public void gracePeriodMustNotBeNegative() {
          assertThrows(IllegalArgumentException.class, () ->  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(10), ofMillis(-1)));
      }
  
      @Test
      public void equalsAndHashcodeShouldBeValidForPositiveCases() {
          final long grace = 1L + (long) (Math.random() * (20L - 1L));
          final long timeDifference = 1L + (long) (Math.random() * (20L - 1L));
          verifyEquality(
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifference), ofMillis(grace)),
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifference), ofMillis(grace))
          );
  
          verifyEquality(
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifference), ofMillis(grace)),
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifference), ofMillis(grace))
          );
  
          verifyEquality(
                  SlidingWindows.ofTimeDifferenceWithNoGrace(ofMillis(timeDifference)),
                  SlidingWindows.ofTimeDifferenceWithNoGrace(ofMillis(timeDifference))
          );
      }
  
      @Test
      public void equalsAndHashcodeShouldNotBeEqualForDifferentTimeDifference() {
          final long grace = 1L + (long) (Math.random() * (10L - 1L));
          final long timeDifferenceOne = 1L + (long) (Math.random() * (10L - 1L));
          final long timeDifferenceTwo = 21L + (long) (Math.random() * (41L - 21L));
          verifyInEquality(
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifferenceOne), ofMillis(grace)),
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifferenceTwo), ofMillis(grace))
          );
      }
  
      @Test
      public void equalsAndHashcodeShouldNotBeEqualForDifferentGracePeriod() {
          final long timeDifference = 1L + (long) (Math.random() * (10L - 1L));
          final long graceOne = 1L + (long) (Math.random() * (10L - 1L));
          final long graceTwo = 21L + (long) (Math.random() * (41L - 21L));
          verifyInEquality(
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifference), ofMillis(graceOne)),
                  SlidingWindows.ofTimeDifferenceAndGrace(ofMillis(timeDifference), ofMillis(graceTwo))
          );
      }
  }
  