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Java example source code file (ForwardingListTest.java)

This example Java source code file (ForwardingListTest.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

collection, exception, forwardinglist, forwardinglisttest, forwardingtestcase, list, listiterator, object, override, standardimplforwardinglist, string, suppresswarnings, teststringlistgenerator, testsuite, util

The ForwardingListTest.java Java example source code

/*
 * Copyright (C) 2007 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.truth.Truth.assertThat;

import com.google.common.collect.testing.ListTestSuiteBuilder;
import com.google.common.collect.testing.TestStringListGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.ListFeature;

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

import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.RandomAccess;

/**
 * Tests for {@code ForwardingList}.
 *
 * @author Robert Konigsberg
 * @author Louis Wasserman
 */
public class ForwardingListTest extends ForwardingTestCase {
  static final class StandardImplForwardingList<T> extends ForwardingList {
    private final List<T> backingList;

    StandardImplForwardingList(List<T> backingList) {
      this.backingList = backingList;
    }

    @Override protected List<T> delegate() {
      return backingList;
    }

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

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

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

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

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

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

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

    @Override public String toString() {
      return standardToString();
    }

    @Override public boolean addAll(
        int index, Collection<? extends T> elements) {
      return standardAddAll(index, elements);
    }

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

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

    @Override public int indexOf(Object element) {
      return standardIndexOf(element);
    }

    @Override public int lastIndexOf(Object element) {
      return standardLastIndexOf(element);
    }

    @Override public Iterator<T> iterator() {
      return listIterator();
    }

    @Override public ListIterator<T> listIterator() {
      return listIterator(0);
    }

    @Override public ListIterator<T> listIterator(int index) {
      return standardListIterator(index);
    }

    @Override public List<T> subList(int fromIndex, int toIndex) {
      return standardSubList(fromIndex, toIndex);
    }
  }

  private static final List<String> EMPTY_LIST =
      Collections.<String>emptyList();

  private List<String> forward;

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

    suite.addTestSuite(ForwardingListTest.class);
    suite.addTest(ListTestSuiteBuilder.using(new TestStringListGenerator() {

      @Override protected List<String> create(String[] elements) {
        return new StandardImplForwardingList<String>(
            Lists.newArrayList(elements));
      }
    }).named("ForwardingList[ArrayList] with standard implementations")
        .withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_VALUES,
            ListFeature.GENERAL_PURPOSE).createTestSuite());
    suite.addTest(ListTestSuiteBuilder.using(new TestStringListGenerator() {

      @Override protected List<String> create(String[] elements) {
        return new StandardImplForwardingList<String>(
            ImmutableList.copyOf(elements));
      }
    }).named("ForwardingList[ImmutableList] with standard implementations")
        .withFeatures(CollectionSize.ANY, 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 List<String> list = createProxyInstance(List.class);
    forward = new ForwardingList<String>() {
      @Override protected List<String> delegate() {
        return list;
      }
    };
  }

  public void testAdd_T() {
    forward.add("asdf");
    assertEquals("[add(Object)]", getCalls());
  }

  public void testAdd_int_T() {
    forward.add(0, "asdf");
    assertEquals("[add(int,Object)]", getCalls());
  }

  public void testAddAll_Collection() {
    forward.addAll(EMPTY_LIST);
    assertEquals("[addAll(Collection)]", getCalls());
  }

  public void testAddAll_int_Collection() {
    forward.addAll(0, Collections.singleton("asdf"));
    assertEquals("[addAll(int,Collection)]", getCalls());
  }

  public void testClear() {
    forward.clear();
    assertEquals("[clear]", getCalls());
  }

  public void testContains_Object() {
    forward.contains(null);
    assertEquals("[contains(Object)]", getCalls());
  }

  public void testContainsAll_Collection() {
    forward.containsAll(EMPTY_LIST);
    assertEquals("[containsAll(Collection)]", getCalls());
  }

  public void testGet_int() {
    forward.get(0);
    assertEquals("[get(int)]", getCalls());
  }

  public void testIndexOf_Object() {
    forward.indexOf(null);
    assertEquals("[indexOf(Object)]", getCalls());
  }

  public void testIsEmpty() {
    forward.isEmpty();
    assertEquals("[isEmpty]", getCalls());
  }

  public void testIterator() {
    forward.iterator();
    assertEquals("[iterator]", getCalls());
  }

  public void testLastIndexOf_Object() {
    forward.lastIndexOf("asdf");
    assertEquals("[lastIndexOf(Object)]", getCalls());
  }

  public void testListIterator() {
    forward.listIterator();
    assertEquals("[listIterator]", getCalls());
  }

  public void testListIterator_int() {
    forward.listIterator(0);
    assertEquals("[listIterator(int)]", getCalls());
  }

  public void testRemove_int() {
    forward.remove(0);
    assertEquals("[remove(int)]", getCalls());
  }

  public void testRemove_Object() {
    forward.remove(null);
    assertEquals("[remove(Object)]", getCalls());
  }

  public void testRemoveAll_Collection() {
    forward.removeAll(EMPTY_LIST);
    assertEquals("[removeAll(Collection)]", getCalls());
  }

  public void testRetainAll_Collection() {
    forward.retainAll(EMPTY_LIST);
    assertEquals("[retainAll(Collection)]", getCalls());
  }

  public void testSet_int_T() {
    forward.set(0, "asdf");
    assertEquals("[set(int,Object)]", getCalls());
  }

  public void testSize() {
    forward.size();
    assertEquals("[size]", getCalls());
  }

  public void testSubList_int_int() {
    forward.subList(0, 1);
    assertEquals("[subList(int,int)]", getCalls());
  }

  public void testToArray() {
    forward.toArray();
    assertEquals("[toArray]", getCalls());
  }

  public void testToArray_TArray() {
    forward.toArray(new String[0]);
    assertEquals("[toArray(Object[])]", getCalls());
  }

  public void testEquals_Object() {
    forward.equals("asdf");
    assertEquals("[equals(Object)]", getCalls());
  }

  public void testHashCode() {
    forward.hashCode();
    assertEquals("[hashCode]", getCalls());
  }

  public void testRandomAccess() {
    assertThat(forward).isNotInstanceOf(RandomAccess.class);
  }

  public void testToString() {
    forward.toString();
    assertEquals("[toString]", getCalls());
  }
}

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