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.Assert.assertEquals;
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5 | import static org.junit.Assert.assertTrue;
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6 |
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7 | import java.util.Arrays;
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8 | import java.util.HashSet;
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9 |
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10 | import nl.jqno.equalsverifier.EqualsVerifier;
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11 | import org.junit.Test;
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12 |
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13 | /**
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14 | * Unit tests of {@link MultiMap} class.
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15 | */
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16 | public class MultiMapTest {
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17 |
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18 | /**
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19 | * Unit test of methods {@link MultiMap#equals} and {@link MultiMap#hashCode}.
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20 | */
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21 | @Test
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22 | public void equalsContract() {
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23 | EqualsVerifier.forClass(MultiMap.class).usingGetClass().verify();
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24 | }
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25 |
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26 | /**
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27 | * Various test of {@link MultiMap}.
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28 | */
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29 | @Test
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30 | public void testMultiMap() {
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31 | final MultiMap<String, String> map = new MultiMap<>();
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32 | assertTrue(map.isEmpty());
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33 | map.put("foo", "bar");
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34 | map.put("foo", "baz");
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35 | map.putVoid("alpha");
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36 | assertEquals(2, map.size());
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37 | assertEquals(new HashSet<>(Arrays.asList("foo", "alpha")), map.keySet());
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38 | assertEquals(new HashSet<>(Arrays.asList("bar", "baz")), map.get("foo"));
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39 | assertEquals(new HashSet<>(), map.get("alpha"));
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40 | assertEquals(null, map.get("beta"));
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41 | assertEquals(new HashSet<>(), map.getValues("alpha"));
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42 | assertEquals(new HashSet<>(), map.getValues("beta"));
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43 | map.put("foo", "baz2");
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44 | map.put("foo", "baz");
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45 | assertEquals(new HashSet<>(Arrays.asList("bar", "baz", "baz2")), map.get("foo"));
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46 | map.remove("foo", "baz");
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47 | assertEquals(new HashSet<>(Arrays.asList("bar", "baz2")), map.get("foo"));
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48 | map.remove("foo");
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49 | assertEquals(null, map.get("foo"));
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50 | assertEquals("(alpha->{})", map.toString());
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51 | map.remove("alpha");
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52 | assertTrue(map.isEmpty());
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53 | map.remove("omega", null);
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54 | assertTrue(map.isEmpty());
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55 | map.clear();
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56 | assertTrue(map.isEmpty());
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57 | map.putAll("foo", Arrays.asList("bar", "baz"));
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58 | assertEquals(new HashSet<>(Arrays.asList("bar", "baz")), map.get("foo"));
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59 | }
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60 | }
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