Java example source code file (ForwardingSortedMultisetTest.java)

This example Java source code file (ForwardingSortedMultisetTest.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

annotation, boundtype, closed, comparator, entry, forwardingsortedmultiset, iterator, multiset, object, open, override, sortedmultiset, standardelementset, standardimplforwardingsortedmultiset, testsuite, util

The ForwardingSortedMultisetTest.java Java example source code

/*
 * Copyright (C) 2011 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.BoundType.CLOSED;
import static com.google.common.collect.BoundType.OPEN;

import com.google.common.collect.Multiset.Entry;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.google.SortedMultisetTestSuiteBuilder;
import com.google.common.collect.testing.google.TestStringMultisetGenerator;

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

import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.NavigableSet;

import javax.annotation.Nullable;

/**
 * Tests for {@link ForwardingSortedMultiset}.
 *
 * @author Louis Wasserman
 */
public class ForwardingSortedMultisetTest extends ForwardingMultisetTest {
  static class StandardImplForwardingSortedMultiset<E> extends ForwardingSortedMultiset {
    private final SortedMultiset<E> backingMultiset;

    StandardImplForwardingSortedMultiset(SortedMultiset<E> backingMultiset) {
      this.backingMultiset = backingMultiset;
    }

    @Override
    protected SortedMultiset<E> delegate() {
      return backingMultiset;
    }

    @Override
    public SortedMultiset<E> descendingMultiset() {
      return new StandardDescendingMultiset() {

        @Override
        Iterator<Entry entryIterator() {
          return backingMultiset
              .descendingMultiset()
              .entrySet()
              .iterator();
        }
      };
    }

    @Override
    public NavigableSet<E> elementSet() {
      return new StandardElementSet();
    }

    @Override
    public Entry<E> firstEntry() {
      return standardFirstEntry();
    }

    @Override
    public Entry<E> lastEntry() {
      return standardLastEntry();
    }

    @Override
    public Entry<E> pollFirstEntry() {
      return standardPollFirstEntry();
    }

    @Override
    public Entry<E> pollLastEntry() {
      return standardPollLastEntry();
    }

    @Override
    public SortedMultiset<E> subMultiset(
        E lowerBound, BoundType lowerBoundType, E upperBound, BoundType upperBoundType) {
      return standardSubMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType);
    }

    @Override
    public int count(@Nullable Object element) {
      return standardCount(element);
    }

    @Override
    public boolean equals(@Nullable Object object) {
      return standardEquals(object);
    }

    @Override
    public int hashCode() {
      return standardHashCode();
    }

    @Override
    public boolean add(E element) {
      return standardAdd(element);
    }

    @Override
    public boolean addAll(Collection<? extends E> collection) {
      return standardAddAll(collection);
    }

    @Override
    public void clear() {
      standardClear();
    }

    @Override
    public boolean contains(@Nullable Object object) {
      return standardContains(object);
    }

    @Override
    public boolean containsAll(Collection<?> collection) {
      return standardContainsAll(collection);
    }

    @Override
    public boolean isEmpty() {
      return standardIsEmpty();
    }

    @Override
    public Iterator<E> iterator() {
      return standardIterator();
    }

    @Override
    public boolean remove(@Nullable Object object) {
      return standardRemove(object);
    }

    @Override
    public boolean removeAll(Collection<?> collection) {
      return standardRemoveAll(collection);
    }

    @Override
    public boolean retainAll(Collection<?> collection) {
      return standardRetainAll(collection);
    }

    @Override
    public int size() {
      return standardSize();
    }

    @Override
    public Object[] toArray() {
      return standardToArray();
    }

    @Override
    public <T> T[] toArray(T[] array) {
      return standardToArray(array);
    }
  }

  public static Test suite() {
    TestSuite suite = new TestSuite();

    suite.addTestSuite(ForwardingSortedMultisetTest.class);
    suite.addTest(SortedMultisetTestSuiteBuilder
        .using(new TestStringMultisetGenerator() {
          @Override
          protected Multiset<String> create(String[] elements) {
            return new StandardImplForwardingSortedMultiset<String>(
                TreeMultiset.create(Arrays.asList(elements)));
          }

          @Override
          public List<String> order(List insertionOrder) {
            return Ordering.natural().sortedCopy(insertionOrder);
          }
        })
        .named("ForwardingSortedMultiset with standard impls")
        .withFeatures(
            CollectionSize.ANY, CollectionFeature.KNOWN_ORDER, CollectionFeature.GENERAL_PURPOSE,
            CollectionFeature.ALLOWS_NULL_QUERIES)
        .createTestSuite());

    return suite;
  }

  @Override
  public void setUp() throws Exception {
    super.setUp();
    /*
     * Class parameters must be raw, so we can't create a proxy with generic type arguments. The
     * created proxy only records calls and returns null, so the type is irrelevant at runtime.
     */
    @SuppressWarnings("unchecked")
    final SortedMultiset<String> sortedMultiset = createProxyInstance(SortedMultiset.class);
    forward = new ForwardingSortedMultiset<String>() {
      @Override
      protected SortedMultiset<String> delegate() {
        return sortedMultiset;
      }
    };
  }

  public void testComparator() {
    Comparator<?> unused = forward().comparator();
    assertEquals("[comparator]", getCalls());
  }

  public void testFirstEntry() {
    Entry<String> unused = forward().firstEntry();
    assertEquals("[firstEntry]", getCalls());
  }

  public void testLastEntry() {
    Entry<String> unused = forward().lastEntry();
    assertEquals("[lastEntry]", getCalls());
  }

  public void testPollFirstEntry() {
    Entry<String> unused = forward().pollFirstEntry();
    assertEquals("[pollFirstEntry]", getCalls());
  }

  public void testPollLastEntry() {
    Entry<String> unused = forward().pollLastEntry();
    assertEquals("[pollLastEntry]", getCalls());
  }

  public void testDescendingMultiset() {
    Multiset<String> unused = forward().descendingMultiset();
    assertEquals("[descendingMultiset]", getCalls());
  }

  public void testHeadMultiset() {
    Multiset<String> unused = forward().headMultiset("abcd", CLOSED);
    assertEquals("[headMultiset(Object,BoundType)]", getCalls());
  }

  public void testSubMultiset() {
    Multiset<String> unused = forward().subMultiset("abcd", CLOSED, "dcba", OPEN);
    assertEquals("[subMultiset(Object,BoundType,Object,BoundType)]", getCalls());
  }

  public void testTailMultiset() {
    Multiset<String> unused = forward().tailMultiset("last", OPEN);
    assertEquals("[tailMultiset(Object,BoundType)]", getCalls());
  }

  @Override
  protected SortedMultiset<String> forward() {
    return (SortedMultiset<String>) super.forward();
  }
}