Last change
on this file since 18037 was 18037, checked in by Don-vip, 3 years ago |
fix #21064 - Add JUnit 5 extension for preferences (patch by taylor.smock)
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File size:
1.3 KB
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1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.tools;
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3 |
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4 | import static org.junit.jupiter.api.Assertions.assertFalse;
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5 | import static org.junit.jupiter.api.Assertions.assertNotNull;
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6 | import static org.junit.jupiter.api.Assertions.assertNull;
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7 | import static org.junit.jupiter.api.Assertions.assertSame;
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8 | import static org.junit.jupiter.api.Assertions.assertTrue;
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9 |
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10 | import org.junit.jupiter.api.Test;
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11 |
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12 | /**
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13 | * Tests for {@link ListenableWeakReference}
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14 | * @author Michael Zangl
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15 | * @since 12181
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16 | */
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17 | class ListenableWeakReferenceTest {
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18 | private Object object;
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19 | private boolean called;
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20 |
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21 | /**
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22 | * Tests that {@link ListenableWeakReference#onDereference()} is called.
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23 | * @throws InterruptedException never
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24 | */
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25 | @Test
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26 | void testOnDereference() throws InterruptedException {
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27 | object = new Object();
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28 | called = false;
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29 | ListenableWeakReference<Object> weak = new ListenableWeakReference<>(object, () -> called = true);
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30 | assertFalse(called);
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31 | assertSame(object, weak.get());
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32 |
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33 | // now delete it
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34 | object = null;
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35 | System.gc();
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36 | System.runFinalization();
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37 | // now we wait for the listener thread
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38 | Thread.sleep(200);
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39 | assertTrue(called);
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40 |
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41 | assertNotNull(weak);
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42 | assertNull(weak.get());
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43 | }
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44 |
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45 | }
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