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;
  import static org.junit.jupiter.api.Assertions.fail;
  
  public class SessionWindowsTest {
  
      private static final long ANY_SIZE = 123L;
      private static final long ANY_OTHER_SIZE = 456L; // should be larger than anySize
      private static final long ANY_GRACE = 1024L;
  
      @Test
      public void shouldSetWindowGap() {
          final long anyGap = 42L;
  
          assertEquals(anyGap, SessionWindows.ofInactivityGapWithNoGrace(ofMillis(anyGap)).inactivityGap());
          assertEquals(anyGap, SessionWindows.ofInactivityGapAndGrace(ofMillis(anyGap), ofMillis(ANY_GRACE)).inactivityGap());
      }
  
      @Test
      public void gracePeriodShouldEnforceBoundaries() {
          SessionWindows.ofInactivityGapAndGrace(ofMillis(3L), ofMillis(0));
  
          try {
              SessionWindows.ofInactivityGapAndGrace(ofMillis(3L), ofMillis(-1L));
              fail("should not accept negatives");
          } catch (final IllegalArgumentException e) {
              //expected
          }
      }
  
      @Test
      public void noGraceAPIShouldNotSetGracePeriod() {
          assertEquals(0L, SessionWindows.ofInactivityGapWithNoGrace(ofMillis(3L)).gracePeriodMs());
          assertEquals(0L, SessionWindows.ofInactivityGapWithNoGrace(ofMillis(ANY_SIZE)).gracePeriodMs());
          assertEquals(0L, SessionWindows.ofInactivityGapWithNoGrace(ofMillis(ANY_OTHER_SIZE)).gracePeriodMs());
      }
  
      @Test
      public void withGraceAPIShouldSetGracePeriod() {
          assertEquals(ANY_GRACE, SessionWindows.ofInactivityGapAndGrace(ofMillis(3L), ofMillis(ANY_GRACE)).gracePeriodMs());
          assertEquals(ANY_GRACE, SessionWindows.ofInactivityGapAndGrace(ofMillis(ANY_SIZE), ofMillis(ANY_GRACE)).gracePeriodMs());
          assertEquals(ANY_GRACE, SessionWindows.ofInactivityGapAndGrace(ofMillis(ANY_OTHER_SIZE), ofMillis(ANY_GRACE)).gracePeriodMs());
      }
  
      @Test
      public void sessionGapCannotBeNegative() {
          assertThrows(IllegalArgumentException.class, () -> SessionWindows.ofInactivityGapWithNoGrace(ofMillis(-1)));
      }
  
      @Test
      public void sessionGapCanBeZero() {
          SessionWindows.ofInactivityGapWithNoGrace(ofMillis(0));
      }
  
      @Test
      public void equalsAndHashcodeShouldBeValidForPositiveCases() {
          verifyEquality(
              SessionWindows.ofInactivityGapWithNoGrace(ofMillis(1)),
              SessionWindows.ofInactivityGapWithNoGrace(ofMillis(1))
          );
  
          verifyEquality(
              SessionWindows.ofInactivityGapAndGrace(ofMillis(1), ofMillis(11)),
              SessionWindows.ofInactivityGapAndGrace(ofMillis(1), ofMillis(11))
          );
      }
  
      @Test
      public void equalsAndHashcodeShouldBeValidForNegativeCases() {
          verifyInEquality(
              SessionWindows.ofInactivityGapWithNoGrace(ofMillis(9)),
              SessionWindows.ofInactivityGapWithNoGrace(ofMillis(1))
          );
  
          verifyInEquality(
              SessionWindows.ofInactivityGapAndGrace(ofMillis(9), ofMillis(9)),
              SessionWindows.ofInactivityGapAndGrace(ofMillis(1), ofMillis(9))
          );
  
          verifyInEquality(
              SessionWindows.ofInactivityGapAndGrace(ofMillis(1), ofMillis(9)),
              SessionWindows.ofInactivityGapAndGrace(ofMillis(1), ofMillis(6))
          );
      }
  }
  