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Java example source code file (ImmutableListMultimapTest.java)

This example Java source code file (ImmutableListMultimapTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylistmultimap, builder, entry, gwtincompatible, immutablelistmultimap, integer, known_order, multimap, nullpointerexception, override, serializabletester, string, stringholder, teststringlistmultimapgenerator, util

The ImmutableListMultimapTest.java Java example source code

/*
 * Copyright (C) 2008 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
import static com.google.common.collect.testing.features.CollectionFeature.SERIALIZABLE;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_ANY_NULL_QUERIES;
import static com.google.common.truth.Truth.assertThat;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.ImmutableListMultimap.Builder;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.google.ListMultimapTestSuiteBuilder;
import com.google.common.collect.testing.google.TestStringListMultimapGenerator;
import com.google.common.collect.testing.google.UnmodifiableCollectionTests;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.SerializableTester;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Map.Entry;

/**
 * Tests for {@link ImmutableListMultimap}.
 *
 * @author Jared Levy
 */
@GwtCompatible(emulated = true)
public class ImmutableListMultimapTest extends TestCase {
  public static class ImmutableListMultimapGenerator extends TestStringListMultimapGenerator {
    @Override
    protected ListMultimap<String, String> create(Entry[] entries) {
      ImmutableListMultimap.Builder<String, String> builder = ImmutableListMultimap.builder();
      for (Entry<String, String> entry : entries) {
        builder.put(entry.getKey(), entry.getValue());
      }
      return builder.build();
    }
  }
  public static class ImmutableListMultimapCopyOfEntriesGenerator
      extends TestStringListMultimapGenerator {
    @Override
    protected ListMultimap<String, String> create(Entry[] entries) {
      return ImmutableListMultimap.copyOf(Arrays.asList(entries));
    }
  }

  @GwtIncompatible // suite
  public static Test suite() {
    TestSuite suite = new TestSuite();
    suite.addTest(ListMultimapTestSuiteBuilder.using(new ImmutableListMultimapGenerator())
      .named("ImmutableListMultimap")
      .withFeatures(
          ALLOWS_ANY_NULL_QUERIES,
          SERIALIZABLE,
          KNOWN_ORDER,
          CollectionSize.ANY)
      .createTestSuite());
    suite.addTest(ListMultimapTestSuiteBuilder.using(
            new ImmutableListMultimapCopyOfEntriesGenerator())
        .named("ImmutableListMultimap.copyOf[Iterable<Entry>]")
        .withFeatures(
            ALLOWS_ANY_NULL_QUERIES,
            SERIALIZABLE,
            KNOWN_ORDER,
            CollectionSize.ANY)
        .createTestSuite());
    suite.addTestSuite(ImmutableListMultimapTest.class);
    return suite;
  }

  public void testBuilder_withImmutableEntry() {
    ImmutableListMultimap<String, Integer> multimap = new Builder()
        .put(Maps.immutableEntry("one", 1))
        .build();
    assertEquals(Arrays.asList(1), multimap.get("one"));
  }

  public void testBuilder_withImmutableEntryAndNullContents() {
    Builder<String, Integer> builder = new Builder();
    try {
      builder.put(Maps.immutableEntry("one", (Integer) null));
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      builder.put(Maps.immutableEntry((String) null, 1));
      fail();
    } catch (NullPointerException expected) {
    }
  }

  private static class StringHolder {
    String string;
  }

  public void testBuilder_withMutableEntry() {
    ImmutableListMultimap.Builder<String, Integer> builder =
        new Builder<String, Integer>();
    final StringHolder holder = new StringHolder();
    holder.string = "one";
    Entry<String, Integer> entry = new AbstractMapEntry() {
      @Override public String getKey() {
        return holder.string;
      }
      @Override public Integer getValue() {
        return 1;
      }
    };

    builder.put(entry);
    holder.string = "two";
    assertEquals(Arrays.asList(1), builder.build().get("one"));
  }

  public void testBuilderPutAllIterable() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.putAll("foo", Arrays.asList(1, 2, 3));
    builder.putAll("bar", Arrays.asList(4, 5));
    builder.putAll("foo", Arrays.asList(6, 7));
    Multimap<String, Integer> multimap = builder.build();
    assertEquals(Arrays.asList(1, 2, 3, 6, 7), multimap.get("foo"));
    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(7, multimap.size());
  }

  public void testBuilderPutAllVarargs() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.putAll("foo", 1, 2, 3);
    builder.putAll("bar", 4, 5);
    builder.putAll("foo", 6, 7);
    Multimap<String, Integer> multimap = builder.build();
    assertEquals(Arrays.asList(1, 2, 3, 6, 7), multimap.get("foo"));
    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(7, multimap.size());
  }

  public void testBuilderPutAllMultimap() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", 1);
    toPut.put("bar", 4);
    toPut.put("foo", 2);
    toPut.put("foo", 3);
    Multimap<String, Integer> moreToPut = LinkedListMultimap.create();
    moreToPut.put("foo", 6);
    moreToPut.put("bar", 5);
    moreToPut.put("foo", 7);
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.putAll(toPut);
    builder.putAll(moreToPut);
    Multimap<String, Integer> multimap = builder.build();
    assertEquals(Arrays.asList(1, 2, 3, 6, 7), multimap.get("foo"));
    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(7, multimap.size());
  }

  public void testBuilderPutAllWithDuplicates() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.putAll("foo", 1, 2, 3);
    builder.putAll("bar", 4, 5);
    builder.putAll("foo", 1, 6, 7);
    ImmutableListMultimap<String, Integer> multimap = builder.build();
    assertEquals(Arrays.asList(1, 2, 3, 1, 6, 7), multimap.get("foo"));
    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(8, multimap.size());
  }

  public void testBuilderPutWithDuplicates() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.putAll("foo", 1, 2, 3);
    builder.putAll("bar", 4, 5);
    builder.put("foo", 1);
    ImmutableListMultimap<String, Integer> multimap = builder.build();
    assertEquals(Arrays.asList(1, 2, 3, 1), multimap.get("foo"));
    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(6, multimap.size());
  }

  public void testBuilderPutAllMultimapWithDuplicates() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", 1);
    toPut.put("bar", 4);
    toPut.put("foo", 2);
    toPut.put("foo", 1);
    toPut.put("bar", 5);
    Multimap<String, Integer> moreToPut = LinkedListMultimap.create();
    moreToPut.put("foo", 6);
    moreToPut.put("bar", 4);
    moreToPut.put("foo", 7);
    moreToPut.put("foo", 2);
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.putAll(toPut);
    builder.putAll(moreToPut);
    Multimap<String, Integer> multimap = builder.build();
    assertEquals(Arrays.asList(1, 2, 1, 6, 7, 2), multimap.get("foo"));
    assertEquals(Arrays.asList(4, 5, 4), multimap.get("bar"));
    assertEquals(9, multimap.size());
  }

  public void testBuilderPutNullKey() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", null);
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    try {
      builder.put(null, 1);
      fail();
    } catch (NullPointerException expected) {}
    try {
      builder.putAll(null, Arrays.asList(1, 2, 3));
      fail();
    } catch (NullPointerException expected) {}
    try {
      builder.putAll(null, 1, 2, 3);
      fail();
    } catch (NullPointerException expected) {}
    try {
      builder.putAll(toPut);
      fail();
    } catch (NullPointerException expected) {}
  }

  public void testBuilderPutNullValue() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put(null, 1);
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    try {
      builder.put("foo", null);
      fail();
    } catch (NullPointerException expected) {}
    try {
      builder.putAll("foo", Arrays.asList(1, null, 3));
      fail();
    } catch (NullPointerException expected) {}
    try {
      builder.putAll("foo", 1, null, 3);
      fail();
    } catch (NullPointerException expected) {}
    try {
      builder.putAll(toPut);
      fail();
    } catch (NullPointerException expected) {}
  }

  public void testBuilderOrderKeysBy() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.put("b", 3);
    builder.put("d", 2);
    builder.put("a", 5);
    builder.orderKeysBy(Collections.reverseOrder());
    builder.put("c", 4);
    builder.put("a", 2);
    builder.put("b", 6);
    ImmutableListMultimap<String, Integer> multimap = builder.build();
    assertThat(multimap.keySet()).containsExactly("d", "c", "b", "a").inOrder();
    assertThat(multimap.values()).containsExactly(2, 4, 3, 6, 5, 2).inOrder();
    assertThat(multimap.get("a")).containsExactly(5, 2).inOrder();
    assertThat(multimap.get("b")).containsExactly(3, 6).inOrder();
  }

  public void testBuilderOrderKeysByDuplicates() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.put("bb", 3);
    builder.put("d", 2);
    builder.put("a", 5);
    builder.orderKeysBy(new Ordering<String>() {
      @Override
      public int compare(String left, String right) {
        return left.length() - right.length();
      }
    });
    builder.put("cc", 4);
    builder.put("a", 2);
    builder.put("bb", 6);
    ImmutableListMultimap<String, Integer> multimap = builder.build();
    assertThat(multimap.keySet()).containsExactly("d", "a", "bb", "cc").inOrder();
    assertThat(multimap.values()).containsExactly(2, 5, 2, 3, 6, 4).inOrder();
    assertThat(multimap.get("a")).containsExactly(5, 2).inOrder();
    assertThat(multimap.get("bb")).containsExactly(3, 6).inOrder();
  }

  public void testBuilderOrderValuesBy() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.put("b", 3);
    builder.put("d", 2);
    builder.put("a", 5);
    builder.orderValuesBy(Collections.reverseOrder());
    builder.put("c", 4);
    builder.put("a", 2);
    builder.put("b", 6);
    ImmutableListMultimap<String, Integer> multimap = builder.build();
    assertThat(multimap.keySet()).containsExactly("b", "d", "a", "c").inOrder();
    assertThat(multimap.values()).containsExactly(6, 3, 2, 5, 2, 4).inOrder();
    assertThat(multimap.get("a")).containsExactly(5, 2).inOrder();
    assertThat(multimap.get("b")).containsExactly(6, 3).inOrder();
  }

  public void testBuilderOrderKeysAndValuesBy() {
    ImmutableListMultimap.Builder<String, Integer> builder
        = ImmutableListMultimap.builder();
    builder.put("b", 3);
    builder.put("d", 2);
    builder.put("a", 5);
    builder.orderKeysBy(Collections.reverseOrder());
    builder.orderValuesBy(Collections.reverseOrder());
    builder.put("c", 4);
    builder.put("a", 2);
    builder.put("b", 6);
    ImmutableListMultimap<String, Integer> multimap = builder.build();
    assertThat(multimap.keySet()).containsExactly("d", "c", "b", "a").inOrder();
    assertThat(multimap.values()).containsExactly(2, 4, 6, 3, 5, 2).inOrder();
    assertThat(multimap.get("a")).containsExactly(5, 2).inOrder();
    assertThat(multimap.get("b")).containsExactly(6, 3).inOrder();
  }

  public void testCopyOf() {
    ArrayListMultimap<String, Integer> input = ArrayListMultimap.create();
    input.put("foo", 1);
    input.put("bar", 2);
    input.put("foo", 3);
    Multimap<String, Integer> multimap = ImmutableListMultimap.copyOf(input);
    assertEquals(multimap, input);
    assertEquals(input, multimap);
  }

  public void testCopyOfWithDuplicates() {
    ArrayListMultimap<String, Integer> input = ArrayListMultimap.create();
    input.put("foo", 1);
    input.put("bar", 2);
    input.put("foo", 3);
    input.put("foo", 1);
    Multimap<String, Integer> multimap = ImmutableListMultimap.copyOf(input);
    assertEquals(multimap, input);
    assertEquals(input, multimap);
  }

  public void testCopyOfEmpty() {
    ArrayListMultimap<String, Integer> input = ArrayListMultimap.create();
    Multimap<String, Integer> multimap = ImmutableListMultimap.copyOf(input);
    assertEquals(multimap, input);
    assertEquals(input, multimap);
  }

  public void testCopyOfImmutableListMultimap() {
    Multimap<String, Integer> multimap = createMultimap();
    assertSame(multimap, ImmutableListMultimap.copyOf(multimap));
  }

  public void testCopyOfNullKey() {
    ArrayListMultimap<String, Integer> input = ArrayListMultimap.create();
    input.put(null, 1);
    try {
      ImmutableListMultimap.copyOf(input);
      fail();
    } catch (NullPointerException expected) {}
  }

  public void testCopyOfNullValue() {
    ArrayListMultimap<String, Integer> input = ArrayListMultimap.create();
    input.putAll("foo", Arrays.asList(1, null, 3));
    try {
      ImmutableListMultimap.copyOf(input);
      fail();
    } catch (NullPointerException expected) {}
  }

  public void testEmptyMultimapReads() {
    Multimap<String, Integer> multimap = ImmutableListMultimap.of();
    assertFalse(multimap.containsKey("foo"));
    assertFalse(multimap.containsValue(1));
    assertFalse(multimap.containsEntry("foo", 1));
    assertTrue(multimap.entries().isEmpty());
    assertTrue(multimap.equals(ArrayListMultimap.create()));
    assertEquals(Collections.emptyList(), multimap.get("foo"));
    assertEquals(0, multimap.hashCode());
    assertTrue(multimap.isEmpty());
    assertEquals(HashMultiset.create(), multimap.keys());
    assertEquals(Collections.emptySet(), multimap.keySet());
    assertEquals(0, multimap.size());
    assertTrue(multimap.values().isEmpty());
    assertEquals("{}", multimap.toString());
  }

  public void testEmptyMultimapWrites() {
    Multimap<String, Integer> multimap = ImmutableListMultimap.of();
    UnmodifiableCollectionTests.assertMultimapIsUnmodifiable(
        multimap, "foo", 1);
  }

  private Multimap<String, Integer> createMultimap() {
    return ImmutableListMultimap.<String, Integer>builder()
        .put("foo", 1).put("bar", 2).put("foo", 3).build();
  }

  public void testMultimapReads() {
    Multimap<String, Integer> multimap = createMultimap();
    assertTrue(multimap.containsKey("foo"));
    assertFalse(multimap.containsKey("cat"));
    assertTrue(multimap.containsValue(1));
    assertFalse(multimap.containsValue(5));
    assertTrue(multimap.containsEntry("foo", 1));
    assertFalse(multimap.containsEntry("cat", 1));
    assertFalse(multimap.containsEntry("foo", 5));
    assertFalse(multimap.entries().isEmpty());
    assertEquals(3, multimap.size());
    assertFalse(multimap.isEmpty());
    assertEquals("{foo=[1, 3], bar=[2]}", multimap.toString());
  }

  public void testMultimapWrites() {
    Multimap<String, Integer> multimap = createMultimap();
    UnmodifiableCollectionTests.assertMultimapIsUnmodifiable(
        multimap, "bar", 2);
  }

  public void testMultimapEquals() {
    Multimap<String, Integer> multimap = createMultimap();
    Multimap<String, Integer> arrayListMultimap
        = ArrayListMultimap.create();
    arrayListMultimap.putAll("foo", Arrays.asList(1, 3));
    arrayListMultimap.put("bar", 2);

    new EqualsTester()
        .addEqualityGroup(multimap, createMultimap(), arrayListMultimap,
            ImmutableListMultimap.<String, Integer>builder()
                .put("bar", 2).put("foo", 1).put("foo", 3).build())
        .addEqualityGroup(ImmutableListMultimap.<String, Integer>builder()
            .put("bar", 2).put("foo", 3).put("foo", 1).build())
        .addEqualityGroup(ImmutableListMultimap.<String, Integer>builder()
            .put("foo", 2).put("foo", 3).put("foo", 1).build())
        .addEqualityGroup(ImmutableListMultimap.<String, Integer>builder()
            .put("bar", 2).put("foo", 3).build())
        .testEquals();
  }

  public void testOf() {
    assertMultimapEquals(
        ImmutableListMultimap.of("one", 1),
        "one", 1);
    assertMultimapEquals(
        ImmutableListMultimap.of("one", 1, "two", 2),
        "one", 1, "two", 2);
    assertMultimapEquals(
        ImmutableListMultimap.of("one", 1, "two", 2, "three", 3),
        "one", 1, "two", 2, "three", 3);
    assertMultimapEquals(
        ImmutableListMultimap.of("one", 1, "two", 2, "three", 3, "four", 4),
        "one", 1, "two", 2, "three", 3, "four", 4);
    assertMultimapEquals(
        ImmutableListMultimap.of(
            "one", 1, "two", 2, "three", 3, "four", 4, "five", 5),
        "one", 1, "two", 2, "three", 3, "four", 4, "five", 5);
  }

  public void testInverse() {
    assertEquals(
        ImmutableListMultimap.<Integer, String>of(),
        ImmutableListMultimap.<String, Integer>of().inverse());
    assertEquals(
        ImmutableListMultimap.of(1, "one"),
        ImmutableListMultimap.of("one", 1).inverse());
    assertEquals(
        ImmutableListMultimap.of(1, "one", 2, "two"),
        ImmutableListMultimap.of("one", 1, "two", 2).inverse());
    assertEquals(
        ImmutableListMultimap.of("of", 'o', "of", 'f', "to", 't', "to", 'o').inverse(),
        ImmutableListMultimap.of('o', "of", 'f', "of", 't', "to", 'o', "to"));
    assertEquals(
        ImmutableListMultimap.of('f', "foo", 'o', "foo", 'o', "foo"),
        ImmutableListMultimap.of("foo", 'f', "foo", 'o', "foo", 'o').inverse());
  }

  public void testInverseMinimizesWork() {
    ImmutableListMultimap<String, Character> multimap =
        ImmutableListMultimap.<String, Character>builder()
            .put("foo", 'f')
            .put("foo", 'o')
            .put("foo", 'o')
            .put("poo", 'p')
            .put("poo", 'o')
            .put("poo", 'o')
            .build();
    assertSame(multimap.inverse(), multimap.inverse());
    assertSame(multimap, multimap.inverse().inverse());
  }

  private static <K, V> void assertMultimapEquals(Multimap multimap,
      Object... alternatingKeysAndValues) {
    assertEquals(multimap.size(), alternatingKeysAndValues.length / 2);
    int i = 0;
    for (Entry<K, V> entry : multimap.entries()) {
      assertEquals(alternatingKeysAndValues[i++], entry.getKey());
      assertEquals(alternatingKeysAndValues[i++], entry.getValue());
    }
  }

  @GwtIncompatible // SerializableTester
  public void testSerialization() {
    Multimap<String, Integer> multimap = createMultimap();
    SerializableTester.reserializeAndAssert(multimap);
    assertEquals(multimap.size(),
        SerializableTester.reserialize(multimap).size());
    SerializableTester.reserializeAndAssert(multimap.get("foo"));
    LenientSerializableTester.reserializeAndAssertLenient(multimap.keySet());
    LenientSerializableTester.reserializeAndAssertLenient(multimap.keys());
    SerializableTester.reserializeAndAssert(multimap.asMap());
    Collection<Integer> valuesCopy
        = SerializableTester.reserialize(multimap.values());
    assertEquals(HashMultiset.create(multimap.values()),
        HashMultiset.create(valuesCopy));
  }

  @GwtIncompatible // SerializableTester
  public void testEmptySerialization() {
    Multimap<String, Integer> multimap = ImmutableListMultimap.of();
    assertSame(multimap, SerializableTester.reserialize(multimap));
  }
}

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