Java > Open Source Codes > org > apache > commons > collections > map > AbstractTestMap


1 /*
2  * Copyright 2001-2004 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.collections.map;
17
18 import java.io.Serializable ;
19 import java.util.ArrayList ;
20 import java.util.Collection ;
21 import java.util.HashMap ;
22 import java.util.Iterator ;
23 import java.util.List ;
24 import java.util.Map ;
25 import java.util.Set ;
26
27 import org.apache.commons.collections.AbstractTestObject;
28 import org.apache.commons.collections.BulkTest;
29 import org.apache.commons.collections.collection.AbstractTestCollection;
30 import org.apache.commons.collections.set.AbstractTestSet;
31
32 /**
33  * Abstract test class for {@link java.util.Map} methods and contracts.
34  * <p>
35  * The forces at work here are similar to those in {@link AbstractTestCollection}.
36  * If your class implements the full Map interface, including optional
37  * operations, simply extend this class, and implement the
38  * {@link #makeEmptyMap()} method.
39  * <p>
40  * On the other hand, if your map implementation is weird, you may have to
41  * override one or more of the other protected methods. They're described
42  * below.
43  * <p>
44  * <b>Entry Population Methods</b>
45  * <p>
46  * Override these methods if your map requires special entries:
47  *
48  * <ul>
49  * <li>{@link #getSampleKeys()}
50  * <li>{@link #getSampleValues()}
51  * <li>{@link #getNewSampleValues()}
52  * <li>{@link #getOtherKeys()}
53  * <li>{@link #getOtherValues()}
54  * </ul>
55  *
56  * <b>Supported Operation Methods</b>
57  * <p>
58  * Override these methods if your map doesn't support certain operations:
59  *
60  * <ul>
61  * <li> {@link #isPutAddSupported()}
62  * <li> {@link #isPutChangeSupported()}
63  * <li> {@link #isSetValueSupported()}
64  * <li> {@link #isRemoveSupported()}
65  * <li> {@link #isGetStructuralModify()}
66  * <li> {@link #isAllowDuplicateValues()}
67  * <li> {@link #isAllowNullKey()}
68  * <li> {@link #isAllowNullValue()}
69  * </ul>
70  *
71  * <b>Fixture Methods</b>
72  * <p>
73  * For tests on modification operations (puts and removes), fixtures are used
74  * to verify that that operation results in correct state for the map and its
75  * collection views. Basically, the modification is performed against your
76  * map implementation, and an identical modification is performed against
77  * a <I>confirmed</I> map implementation. A confirmed map implementation is
78  * something like <Code>java.util.HashMap</Code>, which is known to conform
79  * exactly to the {@link Map} contract. After the modification takes place
80  * on both your map implementation and the confirmed map implementation, the
81  * two maps are compared to see if their state is identical. The comparison
82  * also compares the collection views to make sure they're still the same.<P>
83  *
84  * The upshot of all that is that <I>any</I> test that modifies the map in
85  * <I>any</I> way will verify that <I>all</I> of the map's state is still
86  * correct, including the state of its collection views. So for instance
87  * if a key is removed by the map's key set's iterator, then the entry set
88  * is checked to make sure the key/value pair no longer appears.<P>
89  *
90  * The {@link #map} field holds an instance of your collection implementation.
91  * The {@link #entrySet}, {@link #keySet} and {@link #values} fields hold
92  * that map's collection views. And the {@link #confirmed} field holds
93  * an instance of the confirmed collection implementation. The
94  * {@link #resetEmpty()} and {@link #resetFull()} methods set these fields to
95  * empty or full maps, so that tests can proceed from a known state.<P>
96  *
97  * After a modification operation to both {@link #map} and {@link #confirmed},
98  * the {@link #verify()} method is invoked to compare the results. The
99  * {@link #verify} method calls separate methods to verify the map and its three
100  * collection views ({@link #verifyMap}, {@link #verifyEntrySet},
101  * {@link #verifyKeySet}, and {@link #verifyValues}). You may want to override
102  * one of the verification methodsto perform additional verifications. For
103  * instance, TestDoubleOrderedMap would want override its
104  * {@link #verifyValues()} method to verify that the values are unique and in
105  * ascending order.<P>
106  *
107  * <b>Other Notes</b>
108  * <p>
109  * If your {@link Map} fails one of these tests by design, you may still use
110  * this base set of cases. Simply override the test case (method) your map
111  * fails and/or the methods that define the assumptions used by the test
112  * cases. For example, if your map does not allow duplicate values, override
113  * {@link #isAllowDuplicateValues()} and have it return <code>false</code>
114  *
115  * @author Michael Smith
116  * @author Rodney Waldhoff
117  * @author Paul Jack
118  * @author Stephen Colebourne
119  * @version $Revision: 1.16 $ $Date: 2004/06/07 23:14:40 $
120  */
121 public abstract class AbstractTestMap extends AbstractTestObject {
122
123     /**
124      * JDK1.2 has bugs in null handling of Maps, especially HashMap.Entry.toString
125      * This avoids nulls for JDK1.2
126      */
127     private static final boolean JDK12;
128     static {
129         String str = System.getProperty("java.version");
130         JDK12 = str.startsWith("1.2");
131     }
132
133     // These instance variables are initialized with the reset method.
134 // Tests for map methods that alter the map (put, putAll, remove)
135 // first call reset() to create the map and its views; then perform
136 // the modification on the map; perform the same modification on the
137 // confirmed; and then call verify() to ensure that the map is equal
138 // to the confirmed, that the already-constructed collection views
139 // are still equal to the confirmed's collection views.
140
141
142     /** Map created by reset(). */
143     protected Map map;
144
145     /** Entry set of map created by reset(). */
146     protected Set entrySet;
147
148     /** Key set of map created by reset(). */
149     protected Set keySet;
150
151     /** Values collection of map created by reset(). */
152     protected Collection values;
153
154     /** HashMap created by reset(). */
155     protected Map confirmed;
156
157     /**
158      * JUnit constructor.
159      *
160      * @param testName the test name
161      */
162     public AbstractTestMap(String testName) {
163         super(testName);
164     }
165
166     /**
167      * Returns true if the maps produced by
168      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
169      * support the <code>put</code> and <code>putAll</code> operations
170      * adding new mappings.
171      * <p>
172      * Default implementation returns true.
173      * Override if your collection class does not support put adding.
174      */
175     public boolean isPutAddSupported() {
176         return true;
177     }
178
179     /**
180      * Returns true if the maps produced by
181      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
182      * support the <code>put</code> and <code>putAll</code> operations
183      * changing existing mappings.
184      * <p>
185      * Default implementation returns true.
186      * Override if your collection class does not support put changing.
187      */
188     public boolean isPutChangeSupported() {
189         return true;
190     }
191
192     /**
193      * Returns true if the maps produced by
194      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
195      * support the <code>setValue</code> operation on entrySet entries.
196      * <p>
197      * Default implementation returns isPutChangeSupported().
198      * Override if your collection class does not support setValue but does
199      * support put changing.
200      */
201     public boolean isSetValueSupported() {
202         return isPutChangeSupported();
203     }
204
205     /**
206      * Returns true if the maps produced by
207      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
208      * support the <code>remove</code> and <code>clear</code> operations.
209      * <p>
210      * Default implementation returns true.
211      * Override if your collection class does not support removal operations.
212      */
213     public boolean isRemoveSupported() {
214         return true;
215     }
216
217     /**
218      * Returns true if the maps produced by
219      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
220      * can cause structural modification on a get(). The example is LRUMap.
221      * <p>
222      * Default implementation returns false.
223      * Override if your map class structurally modifies on get.
224      */
225     public boolean isGetStructuralModify() {
226         return false;
227     }
228
229     /**
230      * Returns whether the sub map views of SortedMap are serializable.
231      * If the class being tested is based around a TreeMap then you should
232      * override and return false as TreeMap has a bug in deserialization.
233      *
234      * @return false
235      */
236     public boolean isSubMapViewsSerializable() {
237         return true;
238     }
239
240     /**
241      * Returns true if the maps produced by
242      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
243      * supports null keys.
244      * <p>
245      * Default implementation returns true.
246      * Override if your collection class does not support null keys.
247      */
248     public boolean isAllowNullKey() {
249         return true;
250     }
251
252     /**
253      * Returns true if the maps produced by
254      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
255      * supports null values.
256      * <p>
257      * Default implementation returns true.
258      * Override if your collection class does not support null values.
259      */
260     public boolean isAllowNullValue() {
261         return true;
262     }
263
264     /**
265      * Returns true if the maps produced by
266      * {@link #makeEmptyMap()} and {@link #makeFullMap()}
267      * supports duplicate values.
268      * <p>
269      * Default implementation returns true.
270      * Override if your collection class does not support duplicate values.
271      */
272     public boolean isAllowDuplicateValues() {
273         return true;
274     }
275
276     /**
277      * Returns the set of keys in the mappings used to test the map. This
278      * method must return an array with the same length as {@link
279      * #getSampleValues()} and all array elements must be different. The
280      * default implementation constructs a set of String keys, and includes a
281      * single null key if {@link #isAllowNullKey()} returns <code>true</code>.
282      */
283     public Object [] getSampleKeys() {
284         Object [] result = new Object [] {
285             "blah", "foo", "bar", "baz", "tmp", "gosh", "golly", "gee",
286             "hello", "goodbye", "we'll", "see", "you", "all", "again",
287             "key",
288             "key2",
289             (isAllowNullKey() && !JDK12) ? null : "nonnullkey"
290         };
291         return result;
292     }
293
294
295     public Object [] getOtherKeys() {
296         return getOtherNonNullStringElements();
297     }
298
299     public Object [] getOtherValues() {
300         return getOtherNonNullStringElements();
301     }
302
303     /**
304      * Returns a list of string elements suitable for return by
305      * {@link #getOtherKeys()} or {@link #getOtherValues}.
306      *
307      * <p>Override getOtherElements to returnthe results of this method if your
308      * collection does not support heterogenous elements or the null element.
309      * </p>
310      */
311     public Object [] getOtherNonNullStringElements() {
312         return new Object [] {
313             "For","then","despite",/* of */"space","I","would","be","brought",
314             "From","limits","far","remote","where","thou","dost","stay"
315         };
316     }
317
318     /**
319      * Returns the set of values in the mappings used to test the map. This
320      * method must return an array with the same length as
321      * {@link #getSampleKeys()}. The default implementation constructs a set of
322      * String values and includes a single null value if
323      * {@link #isAllowNullValue()} returns <code>true</code>, and includes
324      * two values that are the same if {@link #isAllowDuplicateValues()} returns
325      * <code>true</code>.
326      */
327     public Object [] getSampleValues() {
328         Object [] result = new Object [] {
329             "blahv", "foov", "barv", "bazv", "tmpv", "goshv", "gollyv", "geev",
330             "hellov", "goodbyev", "we'llv", "seev", "youv", "allv", "againv",
331             (isAllowNullValue() && !JDK12) ? null : "nonnullvalue",
332             "value",
333             (isAllowDuplicateValues()) ? "value" : "value2",
334         };
335         return result;
336     }
337
338     /**
339      * Returns a the set of values that can be used to replace the values
340      * returned from {@link #getSampleValues()}. This method must return an
341      * array with the same length as {@link #getSampleValues()}. The values
342      * returned from this method should not be the same as those returned from
343      * {@link #getSampleValues()}. The default implementation constructs a
344      * set of String values and includes a single null value if
345      * {@link #isAllowNullValue()} returns <code>true</code>, and includes two values
346      * that are the same if {@link #isAllowDuplicateValues()} returns
347      * <code>true</code>.
348      */
349     public Object [] getNewSampleValues() {
350         Object [] result = new Object [] {
351             (isAllowNullValue() && !JDK12 && isAllowDuplicateValues()) ? null : "newnonnullvalue",
352             "newvalue",
353             (isAllowDuplicateValues()) ? "newvalue" : "newvalue2",
354             "newblahv", "newfoov", "newbarv", "newbazv", "newtmpv", "newgoshv",
355             "newgollyv", "newgeev", "newhellov", "newgoodbyev", "newwe'llv",
356             "newseev", "newyouv", "newallv", "newagainv",
357         };
358         return result;
359     }
360
361     /**
362      * Helper method to add all the mappings described by
363      * {@link #getSampleKeys()} and {@link #getSampleValues()}.
364      */
365     public void addSampleMappings(Map m) {
366
367         Object [] keys = getSampleKeys();
368         Object [] values = getSampleValues();
369         
370         for(int i = 0; i < keys.length; i++) {
371             try {
372                 m.put(keys[i], values[i]);
373             } catch (NullPointerException exception) {
374                 assertTrue("NullPointerException only allowed to be thrown " +
375                            "if either the key or value is null.",
376                            keys[i] == null || values[i] == null);
377                 
378                 assertTrue("NullPointerException on null key, but " +
379                            "isAllowNullKey is not overridden to return false.",
380                            keys[i] == null || !isAllowNullKey());
381                 
382                 assertTrue("NullPointerException on null value, but " +
383                            "isAllowNullValue is not overridden to return false.",
384                            values[i] == null || !isAllowNullValue());
385                 
386                 assertTrue("Unknown reason for NullPointer.", false);
387             }
388         }
389         assertEquals("size must reflect number of mappings added.",
390                      keys.length, m.size());
391     }
392
393     //-----------------------------------------------------------------------
394 /**
395      * Return a new, empty {@link Map} to be used for testing.
396      *
397      * @return the map to be tested
398      */
399     public abstract Map makeEmptyMap();
400
401     /**
402      * Return a new, populated map. The mappings in the map should match the
403      * keys and values returned from {@link #getSampleKeys()} and
404      * {@link #getSampleValues()}. The default implementation uses makeEmptyMap()
405      * and calls {@link #addSampleMappings} to add all the mappings to the
406      * map.
407      *
408      * @return the map to be tested
409      */
410     public Map makeFullMap() {
411         Map m = makeEmptyMap();
412         addSampleMappings(m);
413         return m;
414     }
415
416     /**
417      * Implements the superclass method to return the map to be tested.
418      *
419      * @return the map to be tested
420      */
421     public Object makeObject() {
422         return makeEmptyMap();
423     }
424
425     /**
426      * Override to return a map other than HashMap as the confirmed map.
427      *
428      * @return a map that is known to be valid
429      */
430     public Map makeConfirmedMap() {
431         return new HashMap ();
432     }
433
434     /**
435      * Creates a new Map Entry that is independent of the first and the map.
436      */
437     public Map.Entry cloneMapEntry(Map.Entry entry) {
438         HashMap map = new HashMap ();
439         map.put(entry.getKey(), entry.getValue());
440         return (Map.Entry ) map.entrySet().iterator().next();
441     }
442
443     /**
444      * Gets the compatability version, needed for package access.
445      */
446     public String getCompatibilityVersion() {
447         return super.getCompatibilityVersion();
448     }
449     //-----------------------------------------------------------------------
450 /**
451      * Test to ensure the test setup is working properly. This method checks
452      * to ensure that the getSampleKeys and getSampleValues methods are
453      * returning results that look appropriate. That is, they both return a
454      * non-null array of equal length. The keys array must not have any
455      * duplicate values, and may only contain a (single) null key if
456      * isNullKeySupported() returns true. The values array must only have a null
457      * value if useNullValue() is true and may only have duplicate values if
458      * isAllowDuplicateValues() returns true.
459      */
460     public void testSampleMappings() {
461       Object [] keys = getSampleKeys();
462       Object [] values = getSampleValues();
463       Object [] newValues = getNewSampleValues();
464
465       assertTrue("failure in test: Must have keys returned from " +
466                  "getSampleKeys.", keys != null);
467
468       assertTrue("failure in test: Must have values returned from " +
469                  "getSampleValues.", values != null);
470
471       // verify keys and values have equivalent lengths (in case getSampleX are
472 // overridden)
473 assertEquals("failure in test: not the same number of sample " +
474                    "keys and values.", keys.length, values.length);
475       
476       assertEquals("failure in test: not the same number of values and new values.",
477                    values.length, newValues.length);
478
479       // verify there aren't duplicate keys, and check values
480 for(int i = 0; i < keys.length - 1; i++) {
481           for(int j = i + 1; j < keys.length; j++) {
482               assertTrue("failure in test: duplicate null keys.",
483                          (keys[i] != null || keys[j] != null));
484               assertTrue("failure in test: duplicate non-null key.",
485                          (keys[i] == null || keys[j] == null ||
486                           (!keys[i].equals(keys[j]) &&
487                            !keys[j].equals(keys[i]))));
488           }
489           assertTrue("failure in test: found null key, but isNullKeySupported " +
490                      "is false.", keys[i] != null || isAllowNullKey());
491           assertTrue("failure in test: found null value, but isNullValueSupported " +
492                      "is false.", values[i] != null || isAllowNullValue());
493           assertTrue("failure in test: found null new value, but isNullValueSupported " +
494                      "is false.", newValues[i] != null || isAllowNullValue());
495           assertTrue("failure in test: values should not be the same as new value",
496                      values[i] != newValues[i] &&
497                      (values[i] == null || !values[i].equals(newValues[i])));
498       }
499     }
500     
501     // tests begin here. Each test adds a little bit of tested functionality.
502 // Many methods assume previous methods passed. That is, they do not
503 // exhaustively recheck things that have already been checked in a previous
504 // test methods.
505
506     /**
507      * Test to ensure that makeEmptyMap and makeFull returns a new non-null
508      * map with each invocation.
509      */
510     public void testMakeMap() {
511         Map em = makeEmptyMap();
512         assertTrue("failure in test: makeEmptyMap must return a non-null map.",
513                    em != null);
514         
515         Map em2 = makeEmptyMap();
516         assertTrue("failure in test: makeEmptyMap must return a non-null map.",
517                    em != null);
518
519         assertTrue("failure in test: makeEmptyMap must return a new map " +
520                    "with each invocation.", em != em2);
521
522         Map fm = makeFullMap();
523         assertTrue("failure in test: makeFullMap must return a non-null map.",
524                    fm != null);
525         
526         Map fm2 = makeFullMap();
527         assertTrue("failure in test: makeFullMap must return a non-null map.",
528                    fm != null);
529
530         assertTrue("failure in test: makeFullMap must return a new map " +
531                    "with each invocation.", fm != fm2);
532     }
533
534     /**
535      * Tests Map.isEmpty()
536      */
537     public void testMapIsEmpty() {
538         resetEmpty();
539         assertEquals("Map.isEmpty() should return true with an empty map",
540                      true, map.isEmpty());
541         verify();
542
543         resetFull();
544         assertEquals("Map.isEmpty() should return false with a non-empty map",
545                      false, map.isEmpty());
546         verify();
547     }
548
549     /**
550      * Tests Map.size()
551      */
552     public void testMapSize() {
553         resetEmpty();
554         assertEquals("Map.size() should be 0 with an empty map",
555                      0, map.size());
556         verify();
557
558         resetFull();
559         assertEquals("Map.size() should equal the number of entries " +
560                      "in the map", getSampleKeys().length, map.size());
561         verify();
562     }
563
564     /**
565      * Tests {@link Map#clear()}. If the map {@link #isRemoveSupported()}
566      * can add and remove elements}, then {@link Map#size()} and
567      * {@link Map#isEmpty()} are used to ensure that map has no elements after
568      * a call to clear. If the map does not support adding and removing
569      * elements, this method checks to ensure clear throws an
570      * UnsupportedOperationException.
571      */
572     public void testMapClear() {
573         if (!isRemoveSupported()) {
574             try {
575                 resetFull();
576                 map.clear();
577                 fail("Expected UnsupportedOperationException on clear");
578             } catch (UnsupportedOperationException ex) {}
579             return;
580         }
581
582         resetEmpty();
583         map.clear();
584         confirmed.clear();
585         verify();
586         
587         resetFull();
588         map.clear();
589         confirmed.clear();
590         verify();
591     }
592
593
594     /**
595      * Tests Map.containsKey(Object) by verifying it returns false for all
596      * sample keys on a map created using an empty map and returns true for
597      * all sample keys returned on a full map.
598      */
599     public void testMapContainsKey() {
600         Object [] keys = getSampleKeys();
601
602         resetEmpty();
603         for(int i = 0; i < keys.length; i++) {
604             assertTrue("Map must not contain key when map is empty",
605                        !map.containsKey(keys[i]));
606         }
607         verify();
608
609         resetFull();
610         for(int i = 0; i < keys.length; i++) {
611             assertTrue("Map must contain key for a mapping in the map. " +
612                        "Missing: " + keys[i], map.containsKey(keys[i]));
613         }
614         verify();
615     }
616
617     /**
618      * Tests Map.containsValue(Object) by verifying it returns false for all
619      * sample values on an empty map and returns true for all sample values on
620      * a full map.
621      */
622     public void testMapContainsValue() {
623         Object [] values = getSampleValues();
624
625         resetEmpty();
626         for(int i = 0; i < values.length; i++) {
627             assertTrue("Empty map must not contain value",
628                        !map.containsValue(values[i]));
629         }
630         verify();
631         
632         resetFull();
633         for(int i = 0; i < values.length; i++) {
634             assertTrue("Map must contain value for a mapping in the map.",
635                        map.containsValue(values[i]));
636         }
637         verify();
638     }
639
640
641     /**
642      * Tests Map.equals(Object)
643      */
644     public void testMapEquals() {
645         resetEmpty();
646         assertTrue("Empty maps unequal.", map.equals(confirmed));
647         verify();
648
649         resetFull();
650         assertTrue("Full maps unequal.", map.equals(confirmed));
651         verify();
652
653         resetFull();
654         // modify the HashMap created from the full map and make sure this
655 // change results in map.equals() to return false.
656 Iterator iter = confirmed.keySet().iterator();
657         iter.next();
658         iter.remove();
659         assertTrue("Different maps equal.", !map.equals(confirmed));
660         
661         resetFull();
662         assertTrue("equals(null) returned true.", !map.equals(null));
663         assertTrue("equals(new Object()) returned true.",
664                    !map.equals(new Object ()));
665         verify();
666     }
667
668
669     /**
670      * Tests Map.get(Object)
671      */
672     public void testMapGet() {
673         resetEmpty();
674
675         Object [] keys = getSampleKeys();
676         Object [] values = getSampleValues();
677
678         for (int i = 0; i < keys.length; i++) {
679             assertTrue("Empty map.get() should return null.",
680                        map.get(keys[i]) == null);
681         }
682         verify();
683
684         resetFull();
685         for (int i = 0; i < keys.length; i++) {
686             assertEquals("Full map.get() should return value from mapping.",
687                          values[i], map.get(keys[i]));
688         }
689     }
690
691     /**
692      * Tests Map.hashCode()
693      */
694     public void testMapHashCode() {
695         resetEmpty();
696         assertTrue("Empty maps have different hashCodes.",
697                    map.hashCode() == confirmed.hashCode());
698
699         resetFull();
700         assertTrue("Equal maps have different hashCodes.",
701                    map.hashCode() == confirmed.hashCode());
702     }
703
704     /**
705      * Tests Map.toString(). Since the format of the string returned by the
706      * toString() method is not defined in the Map interface, there is no
707      * common way to test the results of the toString() method. Thereforce,
708      * it is encouraged that Map implementations override this test with one
709      * that checks the format matches any format defined in its API. This
710      * default implementation just verifies that the toString() method does
711      * not return null.
712      */
713     public void testMapToString() {
714         resetEmpty();
715         assertTrue("Empty map toString() should not return null",
716                    map.toString() != null);
717         verify();
718
719         resetFull();
720         assertTrue("Empty map toString() should not return null",
721                    map.toString() != null);
722         verify();
723     }
724
725
726     /**
727      * Compare the current serialized form of the Map
728      * against the canonical version in CVS.
729      */
730     public void testEmptyMapCompatibility() throws Exception {
731         /**
732          * Create canonical objects with this code
733         Map map = makeEmptyMap();
734         if (!(map instanceof Serializable)) return;
735         
736         writeExternalFormToDisk((Serializable) map, getCanonicalEmptyCollectionName(map));
737         */
738
739         // test to make sure the canonical form has been preserved
740 Map map = makeEmptyMap();
741         if (map instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
742             Map map2 = (Map ) readExternalFormFromDisk(getCanonicalEmptyCollectionName(map));
743             assertEquals("Map is empty", 0, map2.size());
744         }
745     }
746
747     /**
748      * Compare the current serialized form of the Map
749      * against the canonical version in CVS.
750      */
751     public void testFullMapCompatibility() throws Exception {
752         /**
753          * Create canonical objects with this code
754         Map map = makeFullMap();
755         if (!(map instanceof Serializable)) return;
756         
757         writeExternalFormToDisk((Serializable) map, getCanonicalFullCollectionName(map));
758         */
759
760         // test to make sure the canonical form has been preserved
761 Map map = makeFullMap();
762         if (map instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
763             Map map2 = (Map ) readExternalFormFromDisk(getCanonicalFullCollectionName(map));
764             assertEquals("Map is the right size", getSampleKeys().length, map2.size());
765         }
766     }
767
768     /**
769      * Tests Map.put(Object, Object)
770      */
771     public void testMapPut() {
772         resetEmpty();
773         Object [] keys = getSampleKeys();
774         Object [] values = getSampleValues();
775         Object [] newValues = getNewSampleValues();
776
777         if (isPutAddSupported()) {
778             for (int i = 0; i < keys.length; i++) {
779                 Object o = map.put(keys[i], values[i]);
780                 confirmed.put(keys[i], values[i]);
781                 verify();
782                 assertTrue("First map.put should return null", o == null);
783                 assertTrue("Map should contain key after put",
784                            map.containsKey(keys[i]));
785                 assertTrue("Map should contain value after put",
786                            map.containsValue(values[i]));
787             }
788             if (isPutChangeSupported()) {
789                 for (int i = 0; i < keys.length; i++) {
790                     Object o = map.put(keys[i], newValues[i]);
791                     confirmed.put(keys[i], newValues[i]);
792                     verify();
793                     assertEquals("Map.put should return previous value when changed",
794                                  values[i], o);
795                     assertTrue("Map should still contain key after put when changed",
796                                map.containsKey(keys[i]));
797                     assertTrue("Map should contain new value after put when changed",
798                                map.containsValue(newValues[i]));
799         
800                     // if duplicates are allowed, we're not guaranteed that the value
801 // no longer exists, so don't try checking that.
802 if (!isAllowDuplicateValues()) {
803                         assertTrue("Map should not contain old value after put when changed",
804                                    !map.containsValue(values[i]));
805                     }
806                 }
807             } else {
808                 try {
809                     // two possible exception here, either valid
810 map.put(keys[0], newValues[0]);
811                     fail("Expected IllegalArgumentException or UnsupportedOperationException on put (change)");
812                 } catch (IllegalArgumentException ex) {
813                 } catch (UnsupportedOperationException ex) {}
814             }
815             
816         } else if (isPutChangeSupported()) {
817             resetEmpty();
818             try {
819                 map.put(keys[0], values[0]);
820                 fail("Expected UnsupportedOperationException or IllegalArgumentException on put (add) when fixed size");
821             } catch (IllegalArgumentException ex) {
822             } catch (UnsupportedOperationException ex) {
823             }
824             
825             resetFull();
826             int i = 0;
827             for (Iterator it = map.keySet().iterator(); it.hasNext() && i < newValues.length; i++) {
828                 Object key = it.next();
829                 Object o = map.put(key, newValues[i]);
830                 Object value = confirmed.put(key, newValues[i]);
831                 verify();
832                 assertEquals("Map.put should return previous value when changed",
833                     value, o);
834                 assertTrue("Map should still contain key after put when changed",
835                     map.containsKey(key));
836                 assertTrue("Map should contain new value after put when changed",
837                     map.containsValue(newValues[i]));
838         
839                 // if duplicates are allowed, we're not guaranteed that the value
840 // no longer exists, so don't try checking that.
841 if (!isAllowDuplicateValues()) {
842                     assertTrue("Map should not contain old value after put when changed",
843                         !map.containsValue(values[i]));
844                 }
845             }
846         } else {
847             try {
848                 map.put(keys[0], values[0]);
849                 fail("Expected UnsupportedOperationException on put (add)");
850             } catch (UnsupportedOperationException ex) {}
851         }
852     }
853
854     /**
855      * Tests Map.put(null, value)
856      */
857     public void testMapPutNullKey() {
858         resetFull();
859         Object [] values = getSampleValues();
860     
861