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Commons Collections example source code file (AbstractTestMap.java)

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

Java - Commons Collections tags/keywords

collection, hashmap, hashmap, hashmap's, illegalargumentexception, io, iterator, map, map, nullpointerexception, object, object, set, set, unsupportedoperationexception, util

The Commons Collections AbstractTestMap.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 org.apache.commons.collections.map;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.collections.AbstractTestObject;
import org.apache.commons.collections.BulkTest;
import org.apache.commons.collections.collection.AbstractTestCollection;
import org.apache.commons.collections.set.AbstractTestSet;

/**
 * Abstract test class for {@link java.util.Map} methods and contracts.
 * <p>
 * The forces at work here are similar to those in {@link AbstractTestCollection}.
 * If your class implements the full Map interface, including optional
 * operations, simply extend this class, and implement the
 * {@link #makeEmptyMap()} method.
 * <p>
 * On the other hand, if your map implementation is weird, you may have to
 * override one or more of the other protected methods.  They're described
 * below.
 * <p>
 * <b>Entry Population Methods
 * <p>
 * Override these methods if your map requires special entries:
 * 
 * <ul>
 * <li>{@link #getSampleKeys()}
 * <li>{@link #getSampleValues()}
 * <li>{@link #getNewSampleValues()}
 * <li>{@link #getOtherKeys()}
 * <li>{@link #getOtherValues()}
 * </ul>
 *
 * <b>Supported Operation Methods
 * <p>
 * Override these methods if your map doesn't support certain operations:
 *
 * <ul>
 * <li> {@link #isPutAddSupported()}
 * <li> {@link #isPutChangeSupported()}
 * <li> {@link #isSetValueSupported()}
 * <li> {@link #isRemoveSupported()}
 * <li> {@link #isGetStructuralModify()}
 * <li> {@link #isAllowDuplicateValues()}
 * <li> {@link #isAllowNullKey()}
 * <li> {@link #isAllowNullValue()}
 * </ul>
 *
 * <b>Fixture Methods
 * <p>
 * For tests on modification operations (puts and removes), fixtures are used
 * to verify that that operation results in correct state for the map and its
 * collection views.  Basically, the modification is performed against your
 * map implementation, and an identical modification is performed against
 * a <I>confirmed map implementation.  A confirmed map implementation is
 * something like <Code>java.util.HashMap, which is known to conform
 * exactly to the {@link Map} contract.  After the modification takes place
 * on both your map implementation and the confirmed map implementation, the
 * two maps are compared to see if their state is identical.  The comparison
 * also compares the collection views to make sure they're still the same.<P>
 *
 * The upshot of all that is that <I>any test that modifies the map in
 * <I>any way will verify that all of the map's state is still
 * correct, including the state of its collection views.  So for instance
 * if a key is removed by the map's key set's iterator, then the entry set 
 * is checked to make sure the key/value pair no longer appears.<P>
 *
 * The {@link #map} field holds an instance of your collection implementation.
 * The {@link #entrySet}, {@link #keySet} and {@link #values} fields hold
 * that map's collection views.  And the {@link #confirmed} field holds
 * an instance of the confirmed collection implementation.  The 
 * {@link #resetEmpty()} and {@link #resetFull()} methods set these fields to 
 * empty or full maps, so that tests can proceed from a known state.<P>
 *
 * After a modification operation to both {@link #map} and {@link #confirmed},
 * the {@link #verify()} method is invoked to compare the results.  The
 * {@link #verify} method calls separate methods to verify the map and its three
 * collection views ({@link #verifyMap}, {@link #verifyEntrySet},
 * {@link #verifyKeySet}, and {@link #verifyValues}).  You may want to override
 * one of the verification methodsto perform additional verifications.  For
 * instance, TestDoubleOrderedMap would want override its
 * {@link #verifyValues()} method to verify that the values are unique and in
 * ascending order.<P>
 *  
 * <b>Other Notes
 * <p>
 * If your {@link Map} fails one of these tests by design, you may still use
 * this base set of cases.  Simply override the test case (method) your map
 * fails and/or the methods that define the assumptions used by the test
 * cases.  For example, if your map does not allow duplicate values, override
 * {@link #isAllowDuplicateValues()} and have it return <code>false
 *
 * @author Michael Smith
 * @author Rodney Waldhoff
 * @author Paul Jack
 * @author Stephen Colebourne
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 */
public abstract class AbstractTestMap extends AbstractTestObject {

    /**
     * JDK1.2 has bugs in null handling of Maps, especially HashMap.Entry.toString
     * This avoids nulls for JDK1.2
     */
    private static final boolean JDK12;
    static {
        String str = System.getProperty("java.version");
        JDK12 = str.startsWith("1.2");
    }

    // These instance variables are initialized with the reset method.
    // Tests for map methods that alter the map (put, putAll, remove) 
    // first call reset() to create the map and its views; then perform
    // the modification on the map; perform the same modification on the
    // confirmed; and then call verify() to ensure that the map is equal
    // to the confirmed, that the already-constructed collection views
    // are still equal to the confirmed's collection views.


    /** Map created by reset(). */
    protected Map map;

    /** Entry set of map created by reset(). */
    protected Set entrySet;

    /** Key set of map created by reset(). */
    protected Set keySet;

    /** Values collection of map created by reset(). */
    protected Collection values;

    /** HashMap created by reset(). */
    protected Map confirmed;

    /**
     * JUnit constructor.
     * 
     * @param testName  the test name
     */
    public AbstractTestMap(String testName) {
        super(testName);
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * support the <code>put and putAll operations
     * adding new mappings.
     * <p>
     * Default implementation returns true.
     * Override if your collection class does not support put adding.
     */
    public boolean isPutAddSupported() {
        return true;
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * support the <code>put and putAll operations
     * changing existing mappings.
     * <p>
     * Default implementation returns true.
     * Override if your collection class does not support put changing.
     */
    public boolean isPutChangeSupported() {
        return true;
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * support the <code>setValue operation on entrySet entries.
     * <p>
     * Default implementation returns isPutChangeSupported().
     * Override if your collection class does not support setValue but does
     * support put changing.
     */
    public boolean isSetValueSupported() {
        return isPutChangeSupported();
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * support the <code>remove and clear operations.
     * <p>
     * Default implementation returns true.
     * Override if your collection class does not support removal operations.
     */
    public boolean isRemoveSupported() {
        return true;
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * can cause structural modification on a get(). The example is LRUMap.
     * <p>
     * Default implementation returns false.
     * Override if your map class structurally modifies on get.
     */
    public boolean isGetStructuralModify() {
        return false;
    }

    /**
     * Returns whether the sub map views of SortedMap are serializable.
     * If the class being tested is based around a TreeMap then you should
     * override and return false as TreeMap has a bug in deserialization.
     * 
     * @return false
     */
    public boolean isSubMapViewsSerializable() {
        return true;
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * supports null keys.
     * <p>
     * Default implementation returns true.
     * Override if your collection class does not support null keys.
     */
    public boolean isAllowNullKey() {
        return true;
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * supports null values.
     * <p>
     * Default implementation returns true.
     * Override if your collection class does not support null values.
     */
    public boolean isAllowNullValue() {
        return true;
    }

    /**
     * Returns true if the maps produced by 
     * {@link #makeEmptyMap()} and {@link #makeFullMap()}
     * supports duplicate values.
     * <p>
     * Default implementation returns true.
     * Override if your collection class does not support duplicate values.
     */
    public boolean isAllowDuplicateValues() {
        return true;
    }

    /**
     *  Returns the set of keys in the mappings used to test the map.  This
     *  method must return an array with the same length as {@link
     *  #getSampleValues()} and all array elements must be different. The
     *  default implementation constructs a set of String keys, and includes a
     *  single null key if {@link #isAllowNullKey()} returns <code>true.
     */
    public Object[] getSampleKeys() {
        Object[] result = new Object[] {
            "blah", "foo", "bar", "baz", "tmp", "gosh", "golly", "gee", 
            "hello", "goodbye", "we'll", "see", "you", "all", "again",
            "key",
            "key2",
            (isAllowNullKey() && !JDK12) ? null : "nonnullkey"
        };
        return result;
    }


    public Object[] getOtherKeys() {
        return getOtherNonNullStringElements();
    }

    public Object[] getOtherValues() {
        return getOtherNonNullStringElements();
    }

    /**
     * Returns a list of string elements suitable for return by
     * {@link #getOtherKeys()} or {@link #getOtherValues}.
     *
     * <p>Override getOtherElements to returnthe results of this method if your
     * collection does not support heterogenous elements or the null element.
     * </p>
     */
    public Object[] getOtherNonNullStringElements() {
        return new Object[] {
            "For","then","despite",/* of */"space","I","would","be","brought",
            "From","limits","far","remote","where","thou","dost","stay"
        };
    }

    /**
     * Returns the set of values in the mappings used to test the map.  This
     * method must return an array with the same length as
     * {@link #getSampleKeys()}.  The default implementation constructs a set of
     * String values and includes a single null value if 
     * {@link #isAllowNullValue()} returns <code>true, and includes
     * two values that are the same if {@link #isAllowDuplicateValues()} returns
     * <code>true.
     */
    public Object[] getSampleValues() {
        Object[] result = new Object[] {
            "blahv", "foov", "barv", "bazv", "tmpv", "goshv", "gollyv", "geev",
            "hellov", "goodbyev", "we'llv", "seev", "youv", "allv", "againv",
            (isAllowNullValue() && !JDK12) ? null : "nonnullvalue",
            "value",
            (isAllowDuplicateValues()) ? "value" : "value2",
        };
        return result;
    }

    /**
     * Returns a the set of values that can be used to replace the values
     * returned from {@link #getSampleValues()}.  This method must return an
     * array with the same length as {@link #getSampleValues()}.  The values
     * returned from this method should not be the same as those returned from
     * {@link #getSampleValues()}.  The default implementation constructs a
     * set of String values and includes a single null value if
     * {@link #isAllowNullValue()} returns <code>true, and includes two values
     * that are the same if {@link #isAllowDuplicateValues()} returns
     * <code>true.  
     */
    public Object[] getNewSampleValues() {
        Object[] result = new Object[] {
            (isAllowNullValue() && !JDK12 && isAllowDuplicateValues()) ? null : "newnonnullvalue",
            "newvalue",
            (isAllowDuplicateValues()) ? "newvalue" : "newvalue2",
            "newblahv", "newfoov", "newbarv", "newbazv", "newtmpv", "newgoshv", 
            "newgollyv", "newgeev", "newhellov", "newgoodbyev", "newwe'llv", 
            "newseev", "newyouv", "newallv", "newagainv",
        };
        return result;
    }

    /**
     *  Helper method to add all the mappings described by
     * {@link #getSampleKeys()} and {@link #getSampleValues()}.
     */
    public void addSampleMappings(Map m) {

        Object[] keys = getSampleKeys();
        Object[] values = getSampleValues();
        
        for(int i = 0; i < keys.length; i++) {
            try {
                m.put(keys[i], values[i]);
            } catch (NullPointerException exception) {
                assertTrue("NullPointerException only allowed to be thrown " +
                           "if either the key or value is null.", 
                           keys[i] == null || values[i] == null);
                
                assertTrue("NullPointerException on null key, but " +
                           "isAllowNullKey is not overridden to return false.", 
                           keys[i] == null || !isAllowNullKey());
                
                assertTrue("NullPointerException on null value, but " +
                           "isAllowNullValue is not overridden to return false.",
                           values[i] == null || !isAllowNullValue());
                
                assertTrue("Unknown reason for NullPointer.", false);
            }
        }
        assertEquals("size must reflect number of mappings added.",
                     keys.length, m.size());
    }

    //-----------------------------------------------------------------------
    /**
     * Return a new, empty {@link Map} to be used for testing. 
     * 
     * @return the map to be tested
     */
    public abstract Map makeEmptyMap();

    /**
     * Return a new, populated map.  The mappings in the map should match the
     * keys and values returned from {@link #getSampleKeys()} and
     * {@link #getSampleValues()}.  The default implementation uses makeEmptyMap()
     * and calls {@link #addSampleMappings} to add all the mappings to the
     * map.
     * 
     * @return the map to be tested
     */
    public Map makeFullMap() {
        Map m = makeEmptyMap();
        addSampleMappings(m);
        return m;
    }

    /**
     * Implements the superclass method to return the map to be tested.
     * 
     * @return the map to be tested
     */
    public Object makeObject() {
        return makeEmptyMap();
    }

    /**
     * Override to return a map other than HashMap as the confirmed map.
     * 
     * @return a map that is known to be valid
     */
    public Map makeConfirmedMap() {
        return new HashMap();
    }

    /**
     * Creates a new Map Entry that is independent of the first and the map.
     */
    public Map.Entry cloneMapEntry(Map.Entry entry) {
        HashMap map = new HashMap();
        map.put(entry.getKey(), entry.getValue());
        return (Map.Entry) map.entrySet().iterator().next();
    }

    /**
     * Gets the compatability version, needed for package access.
     */
    public String getCompatibilityVersion() {
        return super.getCompatibilityVersion();
    }
    //-----------------------------------------------------------------------
    /**
     * Test to ensure the test setup is working properly.  This method checks
     * to ensure that the getSampleKeys and getSampleValues methods are
     * returning results that look appropriate.  That is, they both return a
     * non-null array of equal length.  The keys array must not have any
     * duplicate values, and may only contain a (single) null key if
     * isNullKeySupported() returns true.  The values array must only have a null
     * value if useNullValue() is true and may only have duplicate values if
     * isAllowDuplicateValues() returns true.  
     */
    public void testSampleMappings() {
      Object[] keys = getSampleKeys();
      Object[] values = getSampleValues();
      Object[] newValues = getNewSampleValues();

      assertTrue("failure in test: Must have keys returned from " +
                 "getSampleKeys.", keys != null);

      assertTrue("failure in test: Must have values returned from " +
                 "getSampleValues.", values != null);

      // verify keys and values have equivalent lengths (in case getSampleX are
      // overridden)
      assertEquals("failure in test: not the same number of sample " +
                   "keys and values.",  keys.length, values.length);
      
      assertEquals("failure in test: not the same number of values and new values.",
                   values.length, newValues.length);

      // verify there aren't duplicate keys, and check values
      for(int i = 0; i < keys.length - 1; i++) {
          for(int j = i + 1; j < keys.length; j++) {
              assertTrue("failure in test: duplicate null keys.",
                         (keys[i] != null || keys[j] != null));
              assertTrue("failure in test: duplicate non-null key.",
                         (keys[i] == null || keys[j] == null || 
                          (!keys[i].equals(keys[j]) && 
                           !keys[j].equals(keys[i]))));
          }
          assertTrue("failure in test: found null key, but isNullKeySupported " +
                     "is false.", keys[i] != null || isAllowNullKey());
          assertTrue("failure in test: found null value, but isNullValueSupported " +
                     "is false.", values[i] != null || isAllowNullValue());
          assertTrue("failure in test: found null new value, but isNullValueSupported " +
                     "is false.", newValues[i] != null || isAllowNullValue());
          assertTrue("failure in test: values should not be the same as new value",
                     values[i] != newValues[i] && 
                     (values[i] == null || !values[i].equals(newValues[i])));
      }
    }
    
    // tests begin here.  Each test adds a little bit of tested functionality.
    // Many methods assume previous methods passed.  That is, they do not
    // exhaustively recheck things that have already been checked in a previous
    // test methods.  

    /**
     * Test to ensure that makeEmptyMap and makeFull returns a new non-null
     * map with each invocation.  
     */
    public void testMakeMap() {
        Map em = makeEmptyMap();
        assertTrue("failure in test: makeEmptyMap must return a non-null map.",
                   em != null);
        
        Map em2 = makeEmptyMap();
        assertTrue("failure in test: makeEmptyMap must return a non-null map.",
                   em != null);

        assertTrue("failure in test: makeEmptyMap must return a new map " +
                   "with each invocation.", em != em2);

        Map fm = makeFullMap();
        assertTrue("failure in test: makeFullMap must return a non-null map.",
                   fm != null);
        
        Map fm2 = makeFullMap();
        assertTrue("failure in test: makeFullMap must return a non-null map.",
                   fm != null);

        assertTrue("failure in test: makeFullMap must return a new map " +
                   "with each invocation.", fm != fm2);
    }

    /**
     * Tests Map.isEmpty()
     */
    public void testMapIsEmpty() {
        resetEmpty();
        assertEquals("Map.isEmpty() should return true with an empty map", 
                     true, map.isEmpty());
        verify();

        resetFull();
        assertEquals("Map.isEmpty() should return false with a non-empty map",
                     false, map.isEmpty());
        verify();
    }

    /**
     * Tests Map.size()
     */
    public void testMapSize() {
        resetEmpty();
        assertEquals("Map.size() should be 0 with an empty map",
                     0, map.size());
        verify();

        resetFull();
        assertEquals("Map.size() should equal the number of entries " +
                     "in the map", getSampleKeys().length, map.size());
        verify();
    }

    /**
     * Tests {@link Map#clear()}.  If the map {@link #isRemoveSupported()}
     * can add and remove elements}, then {@link Map#size()} and
     * {@link Map#isEmpty()} are used to ensure that map has no elements after
     * a call to clear.  If the map does not support adding and removing
     * elements, this method checks to ensure clear throws an
     * UnsupportedOperationException.
     */
    public void testMapClear() {
        if (!isRemoveSupported()) {
            try {
                resetFull();
                map.clear();
                fail("Expected UnsupportedOperationException on clear");
            } catch (UnsupportedOperationException ex) {}
            return;
        }

        resetEmpty();
        map.clear();
        confirmed.clear();
        verify();
        
        resetFull();
        map.clear();
        confirmed.clear();
        verify();
    }


    /**
     * Tests Map.containsKey(Object) by verifying it returns false for all
     * sample keys on a map created using an empty map and returns true for
     * all sample keys returned on a full map. 
     */
    public void testMapContainsKey() {
        Object[] keys = getSampleKeys();

        resetEmpty();
        for(int i = 0; i < keys.length; i++) {
            assertTrue("Map must not contain key when map is empty", 
                       !map.containsKey(keys[i]));
        }
        verify();

        resetFull();
        for(int i = 0; i < keys.length; i++) {
            assertTrue("Map must contain key for a mapping in the map. " +
                       "Missing: " + keys[i], map.containsKey(keys[i]));
        }
        verify();
    }

    /**
     * Tests Map.containsValue(Object) by verifying it returns false for all
     * sample values on an empty map and returns true for all sample values on
     * a full map.
     */
    public void testMapContainsValue() {
        Object[] values = getSampleValues();

        resetEmpty();
        for(int i = 0; i < values.length; i++) {
            assertTrue("Empty map must not contain value", 
                       !map.containsValue(values[i]));
        }
        verify();
        
        resetFull();
        for(int i = 0; i < values.length; i++) {
            assertTrue("Map must contain value for a mapping in the map.", 
                       map.containsValue(values[i]));
        }
        verify();
    }


    /**
     * Tests Map.equals(Object)
     */
    public void testMapEquals() {
        resetEmpty();
        assertTrue("Empty maps unequal.", map.equals(confirmed));
        verify();

        resetFull();
        assertTrue("Full maps unequal.", map.equals(confirmed));
        verify();

        resetFull();
        // modify the HashMap created from the full map and make sure this
        // change results in map.equals() to return false.
        Iterator iter = confirmed.keySet().iterator();
        iter.next();
        iter.remove();
        assertTrue("Different maps equal.", !map.equals(confirmed));
        
        resetFull();
        assertTrue("equals(null) returned true.", !map.equals(null));
        assertTrue("equals(new Object()) returned true.", 
                   !map.equals(new Object()));
        verify();
    }


    /**
     * Tests Map.get(Object)
     */
    public void testMapGet() {
        resetEmpty();

        Object[] keys = getSampleKeys();
        Object[] values = getSampleValues();

        for (int i = 0; i < keys.length; i++) {
            assertTrue("Empty map.get() should return null.", 
                       map.get(keys[i]) == null);
        }
        verify();

        resetFull();
        for (int i = 0; i < keys.length; i++) {
            assertEquals("Full map.get() should return value from mapping.", 
                         values[i], map.get(keys[i]));
        }
    }

    /**
     * Tests Map.hashCode()
     */
    public void testMapHashCode() {
        resetEmpty();
        assertTrue("Empty maps have different hashCodes.", 
                   map.hashCode() == confirmed.hashCode());

        resetFull();
        assertTrue("Equal maps have different hashCodes.", 
                   map.hashCode() == confirmed.hashCode());
    }

    /**
     * Tests Map.toString().  Since the format of the string returned by the
     * toString() method is not defined in the Map interface, there is no
     * common way to test the results of the toString() method.  Thereforce,
     * it is encouraged that Map implementations override this test with one
     * that checks the format matches any format defined in its API.  This
     * default implementation just verifies that the toString() method does
     * not return null.
     */
    public void testMapToString() {
        resetEmpty();
        assertTrue("Empty map toString() should not return null", 
                   map.toString() != null);
        verify();

        resetFull();
        assertTrue("Empty map toString() should not return null", 
                   map.toString() != null);
        verify();
    }


    /**
     * Compare the current serialized form of the Map
     * against the canonical version in CVS.
     */
    public void testEmptyMapCompatibility() throws Exception {
        /**
         * Create canonical objects with this code
        Map map = makeEmptyMap();
        if (!(map instanceof Serializable)) return;
        
        writeExternalFormToDisk((Serializable) map, getCanonicalEmptyCollectionName(map));
        */

        // test to make sure the canonical form has been preserved
        Map map = makeEmptyMap();
        if (map instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
            Map map2 = (Map) readExternalFormFromDisk(getCanonicalEmptyCollectionName(map));
            assertEquals("Map is empty", 0, map2.size());
        }
    }

    /**
     * Compare the current serialized form of the Map
     * against the canonical version in CVS.
     */
    public void testFullMapCompatibility() throws Exception {
        /**
         * Create canonical objects with this code
        Map map = makeFullMap();
        if (!(map instanceof Serializable)) return;
        
        writeExternalFormToDisk((Serializable) map, getCanonicalFullCollectionName(map));
        */

        // test to make sure the canonical form has been preserved
        Map map = makeFullMap();
        if (map instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
            Map map2 = (Map) readExternalFormFromDisk(getCanonicalFullCollectionName(map));
            assertEquals("Map is the right size", getSampleKeys().length, map2.size());
        }
    }

    /**
     * Tests Map.put(Object, Object)
     */
    public void testMapPut() {
        resetEmpty();
        Object[] keys = getSampleKeys();
        Object[] values = getSampleValues();
        Object[] newValues = getNewSampleValues();

        if (isPutAddSupported()) {
            for (int i = 0; i < keys.length; i++) {
                Object o = map.put(keys[i], values[i]);
                confirmed.put(keys[i], values[i]);
                verify();
                assertTrue("First map.put should return null", o == null);
                assertTrue("Map should contain key after put", 
                           map.containsKey(keys[i]));
                assertTrue("Map should contain value after put", 
                           map.containsValue(values[i]));
            }
            if (isPutChangeSupported()) {
                for (int i = 0; i < keys.length; i++) {
                    Object o = map.put(keys[i], newValues[i]);
                    confirmed.put(keys[i], newValues[i]);
                    verify();
                    assertEquals("Map.put should return previous value when changed",
                                 values[i], o);
                    assertTrue("Map should still contain key after put when changed",
                               map.containsKey(keys[i]));
                    assertTrue("Map should contain new value after put when changed",
                               map.containsValue(newValues[i]));
        
                    // if duplicates are allowed, we're not guaranteed that the value
                    // no longer exists, so don't try checking that.
                    if (!isAllowDuplicateValues()) {
                        assertTrue("Map should not contain old value after put when changed",
                                   !map.containsValue(values[i]));
                    }
                }
            } else {
                try {
                    // two possible exception here, either valid
                    map.put(keys[0], newValues[0]);
                    fail("Expected IllegalArgumentException or UnsupportedOperationException on put (change)");
                } catch (IllegalArgumentException ex) {
                } catch (UnsupportedOperationException ex) {}
            }
            
        } else if (isPutChangeSupported()) {
            resetEmpty();
            try {
                map.put(keys[0], values[0]);
                fail("Expected UnsupportedOperationException or IllegalArgumentException on put (add) when fixed size");
            } catch (IllegalArgumentException ex) {
            } catch (UnsupportedOperationException ex) {
            }
            
            resetFull();
            int i = 0;
            for (Iterator it = map.keySet().iterator(); it.hasNext() && i < newValues.length; i++) {
                Object key = it.next();
                Object o = map.put(key, newValues[i]);
                Object value = confirmed.put(key, newValues[i]);
                verify();
                assertEquals("Map.put should return previous value when changed",
                    value, o);
                assertTrue("Map should still contain key after put when changed",
                    map.containsKey(key));
                assertTrue("Map should contain new value after put when changed",
                    map.containsValue(newValues[i]));
        
                // if duplicates are allowed, we're not guaranteed that the value
                // no longer exists, so don't try checking that.
                if (!isAllowDuplicateValues()) {
                    assertTrue("Map should not contain old value after put when changed",
                        !map.containsValue(values[i]));
                }
            }
        } else {
            try {
                map.put(keys[0], values[0]);
                fail("Expected UnsupportedOperationException on put (add)");
            } catch (UnsupportedOperationException ex) {}
        }
    }

    /**
     * Tests Map.put(null, value)
     */
    public void testMapPutNullKey() {
        resetFull();
        Object[] values = getSampleValues();
    
        if (isPutAddSupported()) {
            if (isAllowNullKey()) {
                map.put(null, values[0]);
            } else {
                try {
                    map.put(null, values[0]);
                    fail("put(null, value) should throw NPE/IAE");
                } catch (NullPointerException ex) {
                } catch (IllegalArgumentException ex) {}
            }
        }
    }
    
    /**
     * Tests Map.put(null, value)
     */
    public void testMapPutNullValue() {
        resetFull();
        Object[] keys = getSampleKeys();
        
        if (isPutAddSupported()) {
            if (isAllowNullValue()) {
                map.put(keys[0], null);
            } else {
                try {
                    map.put(keys[0], null);
                    fail("put(key, null) should throw NPE/IAE");
                } catch (NullPointerException ex) {
                } catch (IllegalArgumentException ex) {}
            }
        }
    }
    
    /**
     * Tests Map.putAll(map)
     */
    public void testMapPutAll() {
        if (!isPutAddSupported()) {
            if (!isPutChangeSupported()) {
                Map temp = makeFullMap();
                resetEmpty();
                try {
                    map.putAll(temp);
                    fail("Expected UnsupportedOperationException on putAll");
                } catch (UnsupportedOperationException ex) {}
            }
            return;
        }

        // check putAll OK adding empty map to empty map
        resetEmpty();
        assertEquals(0, map.size());
        map.putAll(new HashMap());
        assertEquals(0, map.size());

        // check putAll OK adding empty map to non-empty map
        resetFull();
        int size = map.size();
        map.putAll(new HashMap());
        assertEquals(size, map.size());

        // check putAll OK adding non-empty map to empty map
        resetEmpty();
        Map m2 = makeFullMap();
        map.putAll(m2);
        confirmed.putAll(m2);
        verify();

        // check putAll OK adding non-empty JDK map to empty map
        resetEmpty();
        m2 = makeConfirmedMap();
        Object[] keys = getSampleKeys();
        Object[] values = getSampleValues();
        for(int i = 0; i < keys.length; i++) {
            m2.put(keys[i], values[i]);
        }
        map.putAll(m2);
        confirmed.putAll(m2);
        verify();

        // check putAll OK adding non-empty JDK map to non-empty map
        resetEmpty();
        m2 = makeConfirmedMap();
        map.put(keys[0], values[0]);
        confirmed.put(keys[0], values[0]);
        verify();
        for(int i = 1; i < keys.length; i++) {
            m2.put(keys[i], values[i]);
        }
        map.putAll(m2);
        confirmed.putAll(m2);
        verify();
    }

    /**
     * Tests Map.remove(Object)
     */
    public void testMapRemove() {
        if (!isRemoveSupported()) {
            try {
                resetFull();
                map.remove(map.keySet().iterator().next());
                fail("Expected UnsupportedOperationException on remove");
            } catch (UnsupportedOperationException ex) {}
            return;
        }

        resetEmpty();

        Object[] keys = getSampleKeys();
        Object[] values = getSampleValues();
        for(int i = 0; i < keys.length; i++) {
            Object o = map.remove(keys[i]);
            assertTrue("First map.remove should return null", o == null);
        }
        verify();

        resetFull();

        for(int i = 0; i < keys.length; i++) {
            Object o = map.remove(keys[i]);
            confirmed.remove(keys[i]);
            verify();

            assertEquals("map.remove with valid key should return value",
                         values[i], o);
        }

        Object[] other = getOtherKeys();

        resetFull();
        int size = map.size();
        for (int i = 0; i < other.length; i++) {
            Object o = map.remove(other[i]);
            assertEquals("map.remove for nonexistent key should return null",
                         o, null);
            assertEquals("map.remove for nonexistent key should not " +
                         "shrink map", size, map.size());
        }
        verify();
    }

    //-----------------------------------------------------------------------
    /**
     * Tests that the {@link Map#values} collection is backed by
     * the underlying map for clear().
     */
    public void testValuesClearChangesMap() {
        if (!isRemoveSupported()) return;
        
        // clear values, reflected in map
        resetFull();
        Collection values = map.values();
        assertTrue(map.size() > 0);
        assertTrue(values.size() > 0);
        values.clear();
        assertTrue(map.size() == 0);
        assertTrue(values.size() == 0);
        
        // clear map, reflected in values
        resetFull();
        values = map.values();
        assertTrue(map.size() > 0);
        assertTrue(values.size() > 0);
        map.clear();
        assertTrue(map.size() == 0);
        assertTrue(values.size() == 0);
    }
    
    /**
     * Tests that the {@link Map#keySet} collection is backed by
     * the underlying map for clear().
     */
    public void testKeySetClearChangesMap() {
        if (!isRemoveSupported()) return;
        
        // clear values, reflected in map
        resetFull();
        Set keySet = map.keySet();
        assertTrue(map.size() > 0);
        assertTrue(keySet.size() > 0);
        keySet.clear();
        assertTrue(map.size() == 0);
        assertTrue(keySet.size() == 0);
        
        // clear map, reflected in values
        resetFull();
        keySet = map.keySet();
        assertTrue(map.size() > 0);
        assertTrue(keySet.size() > 0);
        map.clear();
        assertTrue(map.size() == 0);
        assertTrue(keySet.size() == 0);
    }
    
    /**
     * Tests that the {@link Map#entrySet()} collection is backed by
     * the underlying map for clear().
     */
    public void testEntrySetClearChangesMap() {
        if (!isRemoveSupported()) return;
        
        // clear values, reflected in map
        resetFull();
        Set entrySet = map.entrySet();
        assertTrue(map.size() > 0);
        assertTrue(entrySet.size() > 0);
        entrySet.clear();
        assertTrue(map.size() == 0);
        assertTrue(entrySet.size() == 0);
        
        // clear map, reflected in values
        resetFull();
        entrySet = map.entrySet();
        assertTrue(map.size() > 0);
        assertTrue(entrySet.size() > 0);
        map.clear();
        assertTrue(map.size() == 0);
        assertTrue(entrySet.size() == 0);
    }

    //-----------------------------------------------------------------------    
    public void testEntrySetContains1() {
        resetFull();
        Set entrySet = map.entrySet();
        Map.Entry entry = (Map.Entry) entrySet.iterator().next();
        assertEquals(true, entrySet.contains(entry));
    }
    public void testEntrySetContains2() {
        resetFull();
        Set entrySet = map.entrySet();
        Map.Entry entry = (Map.Entry) entrySet.iterator().next();
        Map.Entry test = cloneMapEntry(entry);
        assertEquals(true, entrySet.contains(test));
    }
    public void testEntrySetContains3() {
        resetFull();
        Set entrySet = map.entrySet();
        Map.Entry entry = (Map.Entry) entrySet.iterator().next();
        HashMap temp = new HashMap();
        temp.put(entry.getKey(), "A VERY DIFFERENT VALUE");
        Map.Entry test = (Map.Entry) temp.entrySet().iterator().next();
        assertEquals(false, entrySet.contains(test));
    }
    
    public void testEntrySetRemove1() {
        if (!isRemoveSupported()) return;
        resetFull();
        int size = map.size();
        Set entrySet = map.entrySet();
        Map.Entry entry = (Map.Entry) entrySet.iterator().next();
        Object key = entry.getKey();
        
        assertEquals(true, entrySet.remove(entry));
        assertEquals(false, map.containsKey(key));
        assertEquals(size - 1, map.size());
    }            
    public void testEntrySetRemove2() {
        if (!isRemoveSupported()) return;
        resetFull();
        int size = map.size();
        Set entrySet = map.entrySet();
        Map.Entry entry = (Map.Entry) entrySet.iterator().next();
        Object key = entry.getKey();
        Map.Entry test = cloneMapEntry(entry);
        
        assertEquals(true, entrySet.remove(test));
        assertEquals(false, map.containsKey(key));
        assertEquals(size - 1, map.size());
    }
    public void testEntrySetRemove3() {
        if (!isRemoveSupported()) return;
        resetFull();
        int size = map.size();
        Set entrySet = map.entrySet();
        Map.Entry entry = (Map.Entry) entrySet.iterator().next();
        Object key = entry.getKey();
        HashMap temp = new HashMap();
        temp.put(entry.getKey(), "A VERY DIFFERENT VALUE");
        Map.Entry test = (Map.Entry) temp.entrySet().iterator().next();
        
        assertEquals(false, entrySet.remove(test));
        assertEquals(true, map.containsKey(key));
        assertEquals(size, map.size());
    }
    
    //-----------------------------------------------------------------------
    /**
     * Tests that the {@link Map#values} collection is backed by
     * the underlying map by removing from the values collection
     * and testing if the value was removed from the map.
     * <p>
     * We should really test the "vice versa" case--that values removed
     * from the map are removed from the values collection--also,
     * but that's a more difficult test to construct (lacking a
     * "removeValue" method.)
     * </p>
     * <p>
     * See bug <a href="http://issues.apache.org/bugzilla/show_bug.cgi?id=9573">
     * 9573</a>.
     * </p>
     */
    public void testValuesRemoveChangesMap() {
        resetFull();
        Object[] sampleValues = getSampleValues();
        Collection values = map.values();
        for (int i = 0; i < sampleValues.length; i++) {
            if (map.containsValue(sampleValues[i])) {
                int j = 0;  // loop counter prevents infinite loops when remove is broken
                while (values.contains(sampleValues[i]) && j < 10000) {
                    try {
                        values.remove(sampleValues[i]);
                    } catch (UnsupportedOperationException e) {
                        // if values.remove is unsupported, just skip this test
                        return;
                    }
                    j++;
                }
                assertTrue("values().remove(obj) is broken", j < 10000);
                assertTrue(
                    "Value should have been removed from the underlying map.",
                    !map.containsValue(sampleValues[i]));
            }
        }
    }

    /**
     * Tests that the {@link Map#keySet} set is backed by
     * the underlying map by removing from the keySet set
     * and testing if the key was removed from the map.
     */
    public void testKeySetRemoveChangesMap() {
        resetFull();
        Object[] sampleKeys = getSampleKeys();
        Set keys = map.keySet();
        for (int i = 0; i < sampleKeys.length; i++) {
            try {
                keys.remove(sampleKeys[i]);
            } catch (UnsupportedOperationException e) {
                // if key.remove is unsupported, just skip this test
                return;
            }
            assertTrue(
                "Key should have been removed from the underlying map.",
                !map.containsKey(sampleKeys[i]));
        }
    }

    // TODO: Need:
    //    testValuesRemovedFromEntrySetAreRemovedFromMap
    //    same for EntrySet/KeySet/values's
    //      Iterator.remove, removeAll, retainAll


    /**
     * Utility methods to create an array of Map.Entry objects
     * out of the given key and value arrays.<P>
     *
     * @param keys    the array of keys
     * @param values  the array of values
     * @return an array of Map.Entry of those keys to those values
     */
    private Map.Entry[] makeEntryArray(Object[] keys, Object[] values) {
        Map.Entry[] result = new Map.Entry[keys.length];
        for (int i = 0; i < keys.length; i++) {
            Map map = makeConfirmedMap();
            map.put(keys[i], values[i]);
            result[i] = (Map.Entry) map.entrySet().iterator().next();
        }
        return result;
    }


    /**
     * Bulk test {@link Map#entrySet()}.  This method runs through all of
     * the tests in {@link AbstractTestSet}.
     * After modification operations, {@link #verify()} is invoked to ensure
     * that the map and the other collection views are still valid.
     *
     * @return a {@link AbstractTestSet} instance for testing the map's entry set
     */
    public BulkTest bulkTestMapEntrySet() {
        return new TestMapEntrySet();
    }

    public class TestMapEntrySet extends AbstractTestSet {
        public TestMapEntrySet() {
            super("MapEntrySet");
        }

        // Have to implement manually; entrySet doesn't support addAll
        public Object[] getFullElements() {
            Object[] k = getSampleKeys();
            Object[] v = getSampleValues();
            return makeEntryArray(k, v);
        }
        
        // Have to implement manually; entrySet doesn't support addAll
        public Object[] getOtherElements() {
            Object[] k = getOtherKeys();
            Object[] v = getOtherValues();
            return makeEntryArray(k, v);
        }
        
        public Set makeEmptySet() {
            return makeEmptyMap().entrySet();
        }
        
        public Set makeFullSet() {
            return makeFullMap().entrySet();
        }
        
        public boolean isAddSupported() {
            // Collection views don't support add operations.
            return false;
        }
        public boolean isRemoveSupported() {
            // Entry set should only support remove if map does
            return AbstractTestMap.this.isRemoveSupported();
        }
        public boolean isGetStructuralModify() {
            return AbstractTestMap.this.isGetStructuralModify();
        }
        public boolean isTestSerialization() {
            return false;
        }

        public void resetFull() {
            AbstractTestMap.this.resetFull();
            collection = map.entrySet();
            TestMapEntrySet.this.confirmed = AbstractTestMap.this.confirmed.entrySet();
        }
        
        public void resetEmpty() {
            AbstractTestMap.this.resetEmpty();
            collection = map.entrySet();
            TestMapEntrySet.this.confirmed = AbstractTestMap.this.confirmed.entrySet();
        }
        
        public void testMapEntrySetIteratorEntry() {
            resetFull();
            Iterator it = collection.iterator();
            int count = 0;
            while (it.hasNext()) {
                Map.Entry entry = (Map.Entry) it.next();
                assertEquals(true, AbstractTestMap.this.map.containsKey(entry.getKey()));
                assertEquals(true, AbstractTestMap.this.map.containsValue(entry.getValue()));
                if (isGetStructuralModify() == false) {
                    assertEquals(AbstractTestMap.this.map.get(entry.getKey()), entry.getValue());
                }
                count++;
            }
            assertEquals(collection.size(), count);
        }

        public void testMapEntrySetIteratorEntrySetValue() {
            Object key1 = getSampleKeys()[0];
            Object key2 = (getSampleKeys().length ==1 ? getSampleKeys()[0] : getSampleKeys()[1]);
            Object newValue1 = getNewSampleValues()[0];
            Object newValue2 = (getNewSampleValues().length ==1 ? getNewSampleValues()[0] : getNewSampleValues()[1]);
            
            resetFull();
            // explicitly get entries as sample values/keys are connected for some maps
            // such as BeanMap
            Iterator it = TestMapEntrySet.this.collection.iterator();
            Map.Entry entry1 = getEntry(it, key1);
            it = TestMapEntrySet.this.collection.iterator();
            Map.Entry entry2 = getEntry(it, key2);
            Iterator itConfirmed = TestMapEntrySet.this.confirmed.iterator();
            Map.Entry entryConfirmed1 = getEntry(itConfirmed, key1);
            itConfirmed = TestMapEntrySet.this.confirmed.iterator();
            Map.Entry entryConfirmed2 = getEntry(itConfirmed, key2);
            verify();
            
            if (isSetValueSupported() == false) {
                try {
                    entry1.setValue(newValue1);
                } catch (UnsupportedOperationException ex) {
                }
                return;
            }
            
            entry1.setValue(newValue1);
            entryConfirmed1.setValue(newValue1);
            assertEquals(newValue1, entry1.getValue());
            assertEquals(true, AbstractTestMap.this.map.containsKey(entry1.getKey()));
            assertEquals(true, AbstractTestMap.this.map.containsValue(newValue1));
            assertEquals(newValue1, AbstractTestMap.this.map.get(entry1.getKey()));
            verify();
            
            entry1.setValue(newValue1);
            entryConfirmed1.setValue(newValue1);
            assertEquals(newValue1, entry1.getValue());
            assertEquals(true, AbstractTestMap.this.map.containsKey(entry1.getKey()));
            assertEquals(true, AbstractTestMap.this.map.containsValue(newValue1));
            assertEquals(newValue1, AbstractTestMap.this.map.get(entry1.getKey()));
            verify();
            
            entry2.setValue(newValue2);
            entryConfirmed2.setValue(newValue2);
            assertEquals(newValue2, entry2.getValue());
            assertEquals(true, AbstractTestMap.this.map.containsKey(entry2.getKey()));
            assertEquals(true, AbstractTestMap.this.map.containsValue(newValue2));
            assertEquals(newValue2, AbstractTestMap.this.map.get(entry2.getKey()));
            verify();
        }
        
        public Map.Entry getEntry(Iterator itConfirmed, Object key) {
            Map.Entry entry = null;
            while (itConfirmed.hasNext()) {
                Map.Entry temp = (Map.Entry) itConfirmed.next();
                if (temp.getKey() == null) {
                    if (key == null) {
                        entry = temp;
                        break;
                    }
                } else if (temp.getKey().equals(key)) {
                    entry = temp;
                    break;
                }
            }
            assertNotNull("No matching entry in map for key '" + key + "'", entry);
            return entry;
        }

        public void testMapEntrySetRemoveNonMapEntry() {
            if (isRemoveSupported() == false) return;
            resetFull();
            assertEquals(false, getSet().remove(null));
            assertEquals(false, getSet().remove(new Object()));
        }
        
        public void verify() {
            super.verify();
            AbstractTestMap.this.verify();
        }
    }


    /**
     * Bulk test {@link Map#keySet()}.  This method runs through all of
     * the tests in {@link AbstractTestSet}.
     * After modification operations, {@link #verify()} is invoked to ensure
     * that the map and the other collection views are still valid.
     *
     * @return a {@link AbstractTestSet} instance for testing the map's key set
     */
    public BulkTest bulkTestMapKeySet() {
        return new TestMapKeySet();
    }

    public class TestMapKeySet extends AbstractTestSet {
        public TestMapKeySet() {
            super("");
        }
        public Object[] getFullElements() {
            return getSampleKeys();
        }
        
        public Object[] getOtherElements() {
            return getOtherKeys();
        }
        
        public Set makeEmptySet() {
            return makeEmptyMap().keySet();
        }
        
        public Set makeFullSet() {
            return makeFullMap().keySet();
        }
        
        public boolean isNullSupported() {
            return AbstractTestMap.this.isAllowNullKey();
        }
        public boolean isAddSupported() {
            return false;
        }
        public boolean isRemoveSupported() {
            return AbstractTestMap.this.isRemoveSupported();
        }
        public boolean isTestSerialization() {
            return false;
        }
        
        public void resetEmpty() {
            AbstractTestMap.this.resetEmpty();
            collection = map.keySet();
            TestMapKeySet.this.confirmed = AbstractTestMap.this.confirmed.keySet();
        }
        
        public void resetFull() {
            AbstractTestMap.this.resetFull();
            collection = map.keySet();
            TestMapKeySet.this.confirmed = AbstractTestMap.this.confirmed.keySet();
        }
        
        public void verify() {
            super.verify();
            AbstractTestMap.this.verify();
        }
    }


    /**
     * Bulk test {@link Map#values()}.  This method runs through all of
     * the tests in {@link AbstractTestCollection}.
     * After modification operations, {@link #verify()} is invoked to ensure
     * that the map and the other collection views are still valid.
     *
     * @return a {@link AbstractTestCollection} instance for testing the map's
     *    values collection
     */
    public BulkTest bulkTestMapValues() {
        return new TestMapValues();
    }

    public class TestMapValues extends AbstractTestCollection {
        public TestMapValues() {
            super("");
        }

        public Object[] getFullElements() {
            return getSampleValues();
        }
        
        public Object[] getOtherElements() {
            return getOtherValues();
        }
        
        public Collection makeCollection() {
            return makeEmptyMap().values();
        }
        
        public Collection makeFullCollection() {
            return makeFullMap().values();
        }
        
        public boolean isNullSupported() {
            return AbstractTestMap.this.isAllowNullKey();
        }
        public boolean isAddSupported() {
            return false;
        }
        public boolean isRemoveSupported() {
            return AbstractTestMap.this.isRemoveSupported();
        }
        public boolean isTestSerialization() {
            return false;
        }
        
        public boolean areEqualElementsDistinguishable() {
            // equal values are associated with different keys, so they are
            // distinguishable.  
            return true;
        }

        public Collection makeConfirmedCollection() {
            // never gets called, reset methods are overridden
            return null;
        }
        
        public Collection makeConfirmedFullCollection() {
            // never gets called, reset methods are overridden
            return null;
        }
        
        public void resetFull() {
            AbstractTestMap.this.resetFull();
            collection = map.values();
            TestMapValues.this.confirmed = AbstractTestMap.this.confirmed.values();
        }
        
        public void resetEmpty() {
            AbstractTestMap.this.resetEmpty();
            collection = map.values();
            TestMapValues.this.confirmed = AbstractTestMap.this.confirmed.values();
        }

        public void verify() {
            super.verify();
            AbstractTestMap.this.verify();
        }

        // TODO: should test that a remove on the values collection view
        // removes the proper mapping and not just any mapping that may have
        // the value equal to the value returned from the values iterator.
    }


    /**
     * Resets the {@link #map}, {@link #entrySet}, {@link #keySet},
     * {@link #values} and {@link #confirmed} fields to empty.
     */
    public void resetEmpty() {
        this.map = makeEmptyMap();
        views();
        this.confirmed = makeConfirmedMap();
    }

    /**
     * Resets the {@link #map}, {@link #entrySet}, {@link #keySet},
     * {@link #values} and {@link #confirmed} fields to full.
     */
    public void resetFull() {
        this.map = makeFullMap();
        views();
        this.confirmed = makeConfirmedMap();
        Object[] k = getSampleKeys();
        Object[] v = getSampleValues();
        for (int i = 0; i < k.length; i++) {
            confirmed.put(k[i], v[i]);
        }
    }


    /**
     * Resets the collection view fields.
     */
    private void views() {
        this.keySet = map.keySet();
        this.values = map.values();
        this.entrySet = map.entrySet();
    }


    /**
     * Verifies that {@link #map} is still equal to {@link #confirmed}.
     * This method checks that the map is equal to the HashMap, 
     * <I>and that the map's collection views are still equal to
     * the HashMap's collection views.  An <Code>equals test
     * is done on the maps and their collection views; their size and
     * <Code>isEmpty results are compared; their hashCodes are
     * compared; and <Code>containsAll tests are run on the 
     * collection views.
     */
    public void verify() {
        verifyMap();
        verifyEntrySet();
        verifyKeySet();
        verifyValues();
    }

    public void verifyMap() {
        int size = confirmed.size();
        boolean empty = confirmed.isEmpty();
        assertEquals("Map should be same size as HashMap", 
                     size, map.size());
        assertEquals("Map should be empty if HashMap is", 
                     empty, map.isEmpty());
        assertEquals("hashCodes should be the same",
                     confirmed.hashCode(), map.hashCode());
        // this fails for LRUMap because confirmed.equals() somehow modifies
        // map, causing concurrent modification exceptions.
        //assertEquals("Map should still equal HashMap", confirmed, map);
        // this works though and performs the same verification:
        assertTrue("Map should still equal HashMap", map.equals(confirmed));
        // TODO: this should really be reexamined to figure out why LRU map
        // behaves like it does (the equals shouldn't modify since all accesses
        // by the confirmed collection should be through an iterator, thus not
        // causing LRUMap to change).
    }

    public void verifyEntrySet() {
        int size = confirmed.size();
        boolean empty = confirmed.isEmpty();
        assertEquals("entrySet should be same size as HashMap's" +
                     "\nTest: " + entrySet + "\nReal: " + confirmed.entrySet(),
                     size, entrySet.size());
        assertEquals("entrySet should be empty if HashMap is" +
                     "\nTest: " + entrySet + "\nReal: " + confirmed.entrySet(),
                     empty, entrySet.isEmpty());
        assertTrue("entrySet should contain all HashMap's elements" +
                   "\nTest: " + entrySet + "\nReal: " + confirmed.entrySet(),
                   entrySet.containsAll(confirmed.entrySet()));
        assertEquals("entrySet hashCodes should be the same" +
                     "\nTest: " + entrySet + "\nReal: " + confirmed.entrySet(),
                     confirmed.entrySet().hashCode(), entrySet.hashCode());
        assertEquals("Map's entry set should still equal HashMap's",
                     confirmed.entrySet(), entrySet);
    }

    public void verifyKeySet() { 
        int size = confirmed.size();
        boolean empty = confirmed.isEmpty();
        assertEquals("keySet should be same size as HashMap's" +
                     "\nTest: " + keySet + "\nReal: " + confirmed.keySet(),
                     size, keySet.size());
        assertEquals("keySet should be empty if HashMap is" +
                     "\nTest: " + keySet + "\nReal: " + confirmed.keySet(),
                     empty, keySet.isEmpty());
        assertTrue("keySet should contain all HashMap's elements" +
                   "\nTest: " + keySet + "\nReal: " + confirmed.keySet(),
                   keySet.containsAll(confirmed.keySet()));
        assertEquals("keySet hashCodes should be the same" +
                     "\nTest: " + keySet + "\nReal: " + confirmed.keySet(),
                     confirmed.keySet().hashCode(), keySet.hashCode());
        assertEquals("Map's key set should still equal HashMap's",
                     confirmed.keySet(), keySet);
    }

    public void verifyValues() {
        List known = new ArrayList(confirmed.values());
        List test = new ArrayList(values);

        int size = confirmed.size();
        boolean empty = confirmed.isEmpty();
        assertEquals("values should be same size as HashMap's" +
                     "\nTest: " + test + "\nReal: " + known,
                     size, values.size());
        assertEquals("values should be empty if HashMap is" +
                     "\nTest: " + test + "\nReal: " + known,
                     empty, values.isEmpty());
        assertTrue("values should contain all HashMap's elements" +
                   "\nTest: " + test + "\nReal: " + known,
                    test.containsAll(known));
        assertTrue("values should contain all HashMap's elements" +
                   "\nTest: " + test + "\nReal: " + known,
                   known.containsAll(test));
        // originally coded to use a HashBag, but now separate jar so...
        for (Iterator it = known.iterator(); it.hasNext();) {
            boolean removed = test.remove(it.next());
            assertTrue("Map's values should still equal HashMap's", removed);
        }
        assertTrue("Map's values should still equal HashMap's", test.isEmpty());
    }


    /**
     * Erases any leftover instance variables by setting them to null.
     */
    public void tearDown() throws Exception {
        map = null;
        keySet = null;
        entrySet = null;
        values = null;
        confirmed = null;
    }

}

Other Commons Collections examples (source code examples)

Here is a short list of links related to this Commons Collections AbstractTestMap.java source code file:



my book on functional programming

 

new blog posts

 

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