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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.miele.internal;
  14
  15 import static org.hamcrest.MatcherAssert.assertThat;
  16 import static org.hamcrest.Matchers.equalTo;
  17 import static org.hamcrest.Matchers.is;
  18
  19 import java.time.Clock;
  20 import java.time.Instant;
  21 import java.time.ZoneId;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.junit.jupiter.api.BeforeEach;
  25 import org.junit.jupiter.api.Test;
  26
  27 /**
  28  * Unit tests for {@link TimeStabilizer}.
  29  *
  30  * @author Jacob Laursen - Initial contribution
  31  */
  32 @NonNullByDefault
  33 public class TimeStabilizerTest {
  34
  35     private @NonNullByDefault({}) TimeStabilizer stabilizer;
  36
  37     @BeforeEach
  38     public void initialize() {
  39         stabilizer = new TimeStabilizer();
  40     }
  41
  42     @Test
  43     public void whenLongestPeriodIsFloorThenWeightedAverageIsLess() {
  44         assertThat(stabilizer.apply(getInstantOf("02:00:00"), getInstantOf("22:00:00")),
  45                 is(equalTo(getInstantOf("02:00:00"))));
  46         assertThat(stabilizer.apply(getInstantOf("02:01:00"), getInstantOf("22:00:31")),
  47                 is(equalTo(getInstantOf("02:00:00"))));
  48         assertThat(stabilizer.apply(getInstantOf("02:00:00"), getInstantOf("22:01:00")),
  49                 is(equalTo(getInstantOf("02:00:29"))));
  50     }
  51
  52     @Test
  53     public void whenLongestPeriodIsCeilThenWeightedAverageIsMore() {
  54         assertThat(stabilizer.apply(getInstantOf("02:00:00"), getInstantOf("22:00:00")),
  55                 is(equalTo(getInstantOf("02:00:00"))));
  56         assertThat(stabilizer.apply(getInstantOf("02:01:00"), getInstantOf("22:00:29")),
  57                 is(equalTo(getInstantOf("02:00:00"))));
  58         assertThat(stabilizer.apply(getInstantOf("02:00:00"), getInstantOf("22:01:00")),
  59                 is(equalTo(getInstantOf("02:00:31"))));
  60     }
  61
  62     @Test
  63     public void whenTooMuchFluctuationThenAverageIsDisregarded() {
  64         assertThat(stabilizer.apply(getInstantOf("02:00:00"), getInstantOf("22:00:00")),
  65                 is(equalTo(getInstantOf("02:00:00"))));
  66         assertThat(stabilizer.apply(getInstantOf("02:03:00"), getInstantOf("22:03:00")),
  67                 is(equalTo(getInstantOf("02:00:00"))));
  68         assertThat(stabilizer.apply(getInstantOf("02:04:00"), getInstantOf("22:03:00")),
  69                 is(equalTo(getInstantOf("02:04:00"))));
  70     }
  71
  72     @Test
  73     public void whenOutsideSlidingWindowThenValueIsDisregarded() {
  74         assertThat(stabilizer.apply(getInstantOf("02:00:00"), getInstantOf("22:00:00")),
  75                 is(equalTo(getInstantOf("02:00:00"))));
  76         assertThat(stabilizer.apply(getInstantOf("02:01:00"), getInstantOf("22:10:00")),
  77                 is(equalTo(getInstantOf("02:00:00"))));
  78         assertThat(stabilizer.apply(getInstantOf("02:02:00"), getInstantOf("22:15:00")),
  79                 is(equalTo(getInstantOf("02:00:30"))));
  80         assertThat(stabilizer.apply(getInstantOf("02:02:00"), getInstantOf("22:15:01")),
  81                 is(equalTo(getInstantOf("02:01:00"))));
  82     }
  83
  84     private Instant getInstantOf(String time) {
  85         Clock clock = Clock.fixed(Instant.parse("2022-09-13T" + time + "Z"), ZoneId.of("UTC"));
  86         return Instant.now(clock);
  87     }
  88 }