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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.homematic.internal.handler;
  14
  15 import static org.hamcrest.CoreMatchers.is;
  16 import static org.hamcrest.CoreMatchers.not;
  17 import static org.hamcrest.MatcherAssert.assertThat;
  18
  19 import java.util.ArrayList;
  20 import java.util.List;
  21
  22 import org.junit.jupiter.api.BeforeEach;
  23 import org.junit.jupiter.api.Test;
  24
  25 /**
  26  * Tests for {@link org.openhab.binding.homematic.internal.handler.SimplePortPool}.
  27  *
  28  * @author Florian Stolte - Initial Contribution
  29  */
  30 public class SimplePortPoolTest {
  31
  32     private SimplePortPool simplePortPool;
  33
  34     @BeforeEach
  35     public void setup() {
  36         this.simplePortPool = new SimplePortPool();
  37     }
  38
  39     @Test
  40     public void testPoolOnlyGivesOutPortsNotInUse() {
  41         final List<Integer> ports = acquireSomePorts();
  42
  43         final int newPort = simplePortPool.getNextPort();
  44
  45         for (int port : ports) {
  46             assertThat(port, not(is(newPort)));
  47         }
  48     }
  49
  50     @Test
  51     public void testPoolReusesReleasedPort() {
  52         final List<Integer> ports = acquireSomePorts();
  53         final int firstPort = ports.get(0);
  54
  55         simplePortPool.release(firstPort);
  56         int newPortAfterRelease = simplePortPool.getNextPort();
  57
  58         assertThat(newPortAfterRelease, is(firstPort));
  59     }
  60
  61     @Test
  62     public void testPoolSkipsPortsThatAreSetInUse() {
  63         final int firstPort = simplePortPool.getNextPort();
  64
  65         simplePortPool.setInUse(firstPort + 1);
  66         int newPortAfterSetInUse = simplePortPool.getNextPort();
  67
  68         assertThat(newPortAfterSetInUse, is(firstPort + 2));
  69     }
  70
  71     private List<Integer> acquireSomePorts() {
  72         final int numberOfPorts = 5;
  73         final List<Integer> ports = new ArrayList<>(numberOfPorts);
  74
  75         for (int i = 0; i < numberOfPorts; i++) {
  76             ports.add(simplePortPool.getNextPort());
  77         }
  78
  79         return ports;
  80     }
  81 }