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Java example source code file (ForwardingSetTest.java)

This example Java source code file (ForwardingSetTest.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

empty_list, exception, forwardingset, forwardingsettest, forwardingtestcase, list, object, override, set, standardimplforwardingset, string, suppresswarnings, teststringsetgenerator, testsuite, util

The ForwardingSetTest.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 java.util.Arrays.asList;

import com.google.common.collect.testing.MinimalSet;
import com.google.common.collect.testing.SetTestSuiteBuilder;
import com.google.common.collect.testing.TestStringSetGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;

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

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;

/**
 * Tests for {@code ForwardingSet}.
 *
 * @author Robert Konigsberg
 * @author Louis Wasserman
 */
public class ForwardingSetTest extends ForwardingTestCase {
  static class StandardImplForwardingSet<T> extends ForwardingSet {
    private final Set<T> backingSet;

    StandardImplForwardingSet(Set<T> backingSet) {
      this.backingSet = backingSet;
    }

    @Override protected Set<T> delegate() {
      return backingSet;
    }

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

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

    @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();
    }
  }

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

  Set<String> forward;

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

    suite.addTestSuite(ForwardingSetTest.class);
    suite.addTest(
        SetTestSuiteBuilder.using(new TestStringSetGenerator() {
          @Override protected Set<String> create(String[] elements) {
            return new StandardImplForwardingSet<String>(
                Sets.newLinkedHashSet(asList(elements)));
          }
        }).named(
            "ForwardingSet[LinkedHashSet] with standard implementations")
            .withFeatures(CollectionSize.ANY,
                CollectionFeature.ALLOWS_NULL_VALUES,
                CollectionFeature.GENERAL_PURPOSE).createTestSuite());
    suite.addTest(
        SetTestSuiteBuilder.using(new TestStringSetGenerator() {
          @Override protected Set<String> create(String[] elements) {
            return new StandardImplForwardingSet<String>(
                MinimalSet.of(elements));
          }
        }).named(
            "ForwardingSet[MinimalSet] with standard implementations")
            .withFeatures(CollectionSize.ANY,
                CollectionFeature.ALLOWS_NULL_VALUES).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 Set<String> set = createProxyInstance(Set.class);
    forward = new ForwardingSet<String>() {
      @Override protected Set<String> delegate() {
        return set;
      }
    };
  }

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

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

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

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

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

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

  Set<String> forward() {
    return forward;
  }
}

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