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      1 /*
      2  * Copyright (C) 2012 The Guava Authors
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.common.collect;
     18 
     19 import static com.google.common.truth.Truth.assertThat;
     20 
     21 import com.google.common.annotations.GwtCompatible;
     22 import com.google.common.annotations.GwtIncompatible;
     23 import com.google.common.collect.testing.AnEnum;
     24 import com.google.common.collect.testing.Helpers;
     25 import com.google.common.collect.testing.MapTestSuiteBuilder;
     26 import com.google.common.collect.testing.TestEnumMapGenerator;
     27 import com.google.common.collect.testing.features.CollectionFeature;
     28 import com.google.common.collect.testing.features.CollectionSize;
     29 
     30 import junit.framework.Test;
     31 import junit.framework.TestCase;
     32 import junit.framework.TestSuite;
     33 
     34 import java.util.Map;
     35 import java.util.Map.Entry;
     36 
     37 /**
     38  * Tests for {@code ImmutableEnumMap}.
     39  *
     40  * @author Louis Wasserman
     41  */
     42 @GwtCompatible(emulated = true)
     43 public class ImmutableEnumMapTest extends TestCase {
     44   public static class ImmutableEnumMapGenerator extends TestEnumMapGenerator {
     45     @Override
     46     protected Map<AnEnum, String> create(Entry<AnEnum, String>[] entries) {
     47       Map<AnEnum, String> map = Maps.newHashMap();
     48       for (Entry<AnEnum, String> entry : entries) {
     49         map.put(entry.getKey(), entry.getValue());
     50       }
     51       return Maps.immutableEnumMap(map);
     52     }
     53   }
     54 
     55   @GwtIncompatible("suite")
     56   public static Test suite() {
     57     TestSuite suite = new TestSuite();
     58     suite.addTest(MapTestSuiteBuilder.using(new ImmutableEnumMapGenerator())
     59       .named("Maps.immutableEnumMap")
     60       .withFeatures(CollectionSize.ANY,
     61           CollectionFeature.SERIALIZABLE,
     62           CollectionFeature.ALLOWS_NULL_QUERIES)
     63       .createTestSuite());
     64     suite.addTestSuite(ImmutableEnumMapTest.class);
     65     return suite;
     66   }
     67 
     68   public void testEmptyImmutableEnumMap() {
     69     ImmutableMap<AnEnum, String> map = Maps.immutableEnumMap(ImmutableMap.<AnEnum, String>of());
     70     assertEquals(ImmutableMap.of(), map);
     71   }
     72 
     73   public void testImmutableEnumMapOrdering() {
     74     ImmutableMap<AnEnum, String> map = Maps.immutableEnumMap(
     75         ImmutableMap.of(AnEnum.C, "c", AnEnum.A, "a", AnEnum.E, "e"));
     76 
     77     assertThat(map.entrySet()).has().exactly(
     78         Helpers.mapEntry(AnEnum.A, "a"),
     79         Helpers.mapEntry(AnEnum.C, "c"),
     80         Helpers.mapEntry(AnEnum.E, "e")).inOrder();
     81   }
     82 }
     83