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.apache.kafka.streams.kstream.internals.UnlimitedWindow;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.Map;
  
  import static java.time.Instant.ofEpochMilli;
  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.assertTrue;
  
  public class UnlimitedWindowsTest {
  
      private static final long ANY_START_TIME = 10L;
  
      @Test
      public void shouldSetWindowStartTime() {
          assertEquals(ANY_START_TIME, UnlimitedWindows.of().startOn(ofEpochMilli(ANY_START_TIME)).startMs);
      }
  
      @Test
      public void startTimeMustNotBeNegative() {
          assertThrows(IllegalArgumentException.class, () -> UnlimitedWindows.of().startOn(ofEpochMilli(-1)));
      }
  
      @Test
      public void shouldIncludeRecordsThatHappenedOnWindowStart() {
          final UnlimitedWindows w = UnlimitedWindows.of().startOn(ofEpochMilli(ANY_START_TIME));
          final Map<Long, UnlimitedWindow> matchedWindows = w.windowsFor(w.startMs);
          assertEquals(1, matchedWindows.size());
          assertEquals(new UnlimitedWindow(ANY_START_TIME), matchedWindows.get(ANY_START_TIME));
      }
  
      @Test
      public void shouldIncludeRecordsThatHappenedAfterWindowStart() {
          final UnlimitedWindows w = UnlimitedWindows.of().startOn(ofEpochMilli(ANY_START_TIME));
          final long timestamp = w.startMs + 1;
          final Map<Long, UnlimitedWindow> matchedWindows = w.windowsFor(timestamp);
          assertEquals(1, matchedWindows.size());
          assertEquals(new UnlimitedWindow(ANY_START_TIME), matchedWindows.get(ANY_START_TIME));
      }
  
      @Test
      public void shouldExcludeRecordsThatHappenedBeforeWindowStart() {
          final UnlimitedWindows w = UnlimitedWindows.of().startOn(ofEpochMilli(ANY_START_TIME));
          final long timestamp = w.startMs - 1;
          final Map<Long, UnlimitedWindow> matchedWindows = w.windowsFor(timestamp);
          assertTrue(matchedWindows.isEmpty());
      }
  
      @Test
      public void equalsAndHashcodeShouldBeValidForPositiveCases() {
          verifyEquality(UnlimitedWindows.of(), UnlimitedWindows.of());
  
          verifyEquality(UnlimitedWindows.of().startOn(ofEpochMilli(1)), UnlimitedWindows.of().startOn(ofEpochMilli(1)));
      }
  
      @Test
      public void equalsAndHashcodeShouldBeValidForNegativeCases() {
          verifyInEquality(UnlimitedWindows.of().startOn(ofEpochMilli(9)), UnlimitedWindows.of().startOn(ofEpochMilli(1)));
      }
  
  }
  