Commons Collections example source code file (TestMultiHashMap.java)
The Commons Collections TestMultiHashMap.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;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import junit.framework.Test;
import junit.framework.TestSuite;
import org.apache.commons.collections.map.AbstractTestMap;
/**
* Unit Tests for <code>MultiHashMap.
*
* @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
*
* @author Unknown
*/
public class TestMultiHashMap extends AbstractTestMap {
public TestMultiHashMap(String testName) {
super(testName);
}
public static Test suite() {
return new TestSuite(TestMultiHashMap.class);
}
public static void main(String args[]) {
String[] testCaseName = { TestMultiHashMap.class.getName()};
junit.textui.TestRunner.main(testCaseName);
}
// MutltiHashMap was introduced in Collections 2.x
public String getCompatibilityVersion() {
return "2";
}
public Map makeEmptyMap() {
return new MultiHashMap();
}
//----------------------------
// Tests
//----------------------------
public void testPutNGet() {
MultiHashMap map = new MultiHashMap();
loadMap(map);
checkMap(map);
assertTrue(map.get(new Integer(99)) == null);
map.clear();
assertTrue(map.size() == 0);
}
public void testContainsValue() {
MultiHashMap map = new MultiHashMap();
loadMap(map);
assertTrue(map.containsValue("uno"));
assertTrue(map.containsValue("quatro"));
assertTrue(map.containsValue("two"));
assertTrue(!map.containsValue("uggaBugga"));
map.clear();
}
public void testValues() {
MultiHashMap map = new MultiHashMap();
loadMap(map);
Collection vals = map.values();
assertTrue(vals.size() == getFullSize());
map.clear();
}
static private class MapPair {
MapPair(int key, String val) {
mKey = new Integer(key);
mValue = val;
}
Integer mKey = null;
String mValue = null;
}
static private MapPair[][] sMapPairs =
{
{new MapPair(0,"zero")},
{new MapPair(1,"one"), new MapPair(1,"ONE"), new MapPair(1,"uno")},
{new MapPair(2,"two"), new MapPair(2,"two") },
{new MapPair(3,"three"), new MapPair(3,"THREE"), new MapPair(3,"tres")},
{new MapPair(4,"four"), new MapPair(4,"quatro")}
};
private void loadMap(MultiHashMap map) {
// Set up so that we load the keys "randomly"
// (i.e. we don't want to load int row-order, so that all like keys
// load together. We want to mix it up...)
int numRows = sMapPairs.length;
int maxCols = 0;
for (int ii = 0; ii < sMapPairs.length; ii++) {
if (sMapPairs[ii].length > maxCols) {
maxCols = sMapPairs[ii].length;
}
}
for (int ii = 0; ii < maxCols; ii++) {
for (int jj = 0; jj < numRows; jj++) {
if (ii < sMapPairs[jj].length) {
map.put(sMapPairs[jj][ii].mKey, sMapPairs[jj][ii].mValue);
//---------------------------------------------------------
}
}
}
assertTrue(map.size() == sMapPairs.length);
}
private void checkMap(MultiHashMap map) {
for (int ii = 0; ii < sMapPairs.length; ii++) {
checkKeyList(map, ii);
}
}
private void checkKeyList(MultiHashMap map, int index) {
assertTrue(index < sMapPairs.length);
Integer key = sMapPairs[index][0].mKey;
Object obj = map.get(key);
//--------------------------
assertTrue(obj != null);
assertTrue(obj instanceof Collection);
Collection keyList = (Collection) obj;
assertTrue(keyList.size() == sMapPairs[index].length);
Iterator iter = keyList.iterator();
while (iter.hasNext()) {
Object oval = iter.next();
assertTrue(oval != null);
assertTrue(oval instanceof String);
String val = (String) oval;
boolean foundIt = false;
for (int ii = 0; ii < sMapPairs[index].length; ii++) {
if (val.equals(sMapPairs[index][ii].mValue)) {
foundIt = true;
}
}
assertTrue(foundIt);
}
}
public int getFullSize() {
int len = 0;
for (int ii = 0; ii < sMapPairs.length; ii++) {
len += sMapPairs[ii].length;
}
return len;
}
public void testEntrySetIterator() {
}
public void testEntrySetContainsProperMappings() {
}
public void testEntrySetIteratorHasProperMappings() {
// override and ignore test -- it will fail when verifying the iterator for
// the set contains the right value -- we're not returning the value, we're
// returning a collection.
// TODO: re-implement this test to ensure the values of the iterator match
// the proper collection rather than the value the superclass is checking
// for.
return;
}
// Next methods are overriden because MultiHashMap values are always a
// collection, and deviate from the Map contract because of this.
// TODO: implement the tests to ensure that Map.get(Object) returns the
// appropriate collection of values
public void testMapGet() {
}
public void testMapPut() {
}
public void testMapPutAll() {
}
public void testMapRemove() {
}
public void testMapEquals() {
MultiHashMap one = new MultiHashMap();
Integer value = new Integer(1);
one.put("One", value);
one.remove("One", value);
MultiHashMap two = new MultiHashMap();
assertEquals(two, one);
}
public void testMapHashCode() {
}
// The verification for the map and its entry set must also be overridden
// because the values are not going to be the same as the values in the
// confirmed map (they're going to be collections of values instead).
public void verifyMap() {
// TODO: implement test to ensure that map is the same as confirmed if
// its values were converted into collections.
}
public void verifyEntrySet() {
// TODO: implement test to ensure that each entry is the same as one in
// the confirmed map, but with the value wrapped in a collection.
}
// The verification method must be overridden because MultiHashMap's
// values() is not properly backed by the map (Bug 9573).
public void verifyValues() {
// update the values view to the latest version, then proceed to verify
// as usual.
values = map.values();
super.verifyValues();
}
//-----------------------------------------------------------------------
public void testGetCollection() {
MultiHashMap map = new MultiHashMap();
map.put("A", "AA");
assertSame(map.get("A"), map.getCollection("A"));
}
public void testTotalSize() {
MultiHashMap map = new MultiHashMap();
assertEquals(0, map.totalSize());
map.put("A", "AA");
assertEquals(1, map.totalSize());
map.put("B", "BA");
assertEquals(2, map.totalSize());
map.put("B", "BB");
assertEquals(3, map.totalSize());
map.put("B", "BC");
assertEquals(4, map.totalSize());
map.remove("A");
assertEquals(3, map.totalSize());
map.remove("B", "BC");
assertEquals(2, map.totalSize());
}
public void testSize_Key() {
MultiHashMap map = new MultiHashMap();
assertEquals(0, map.size("A"));
assertEquals(0, map.size("B"));
map.put("A", "AA");
assertEquals(1, map.size("A"));
assertEquals(0, map.size("B"));
map.put("B", "BA");
assertEquals(1, map.size("A"));
assertEquals(1, map.size("B"));
map.put("B", "BB");
assertEquals(1, map.size("A"));
assertEquals(2, map.size("B"));
map.put("B", "BC");
assertEquals(1, map.size("A"));
assertEquals(3, map.size("B"));
map.remove("A");
assertEquals(0, map.size("A"));
assertEquals(3, map.size("B"));
map.remove("B", "BC");
assertEquals(0, map.size("A"));
assertEquals(2, map.size("B"));
}
public void testIterator_Key() {
MultiHashMap map = new MultiHashMap();
assertEquals(false, map.iterator("A").hasNext());
map.put("A", "AA");
Iterator it = map.iterator("A");
assertEquals(true, it.hasNext());
it.next();
assertEquals(false, it.hasNext());
}
public void testContainsValue_Key() {
MultiHashMap map = new MultiHashMap();
assertEquals(false, map.containsValue("A", "AA"));
assertEquals(false, map.containsValue("B", "BB"));
map.put("A", "AA");
assertEquals(true, map.containsValue("A", "AA"));
assertEquals(false, map.containsValue("A", "AB"));
}
public void testPutAll_Map1() {
MultiMap original = new MultiHashMap();
original.put("key", "object1");
original.put("key", "object2");
MultiHashMap test = new MultiHashMap();
test.put("keyA", "objectA");
test.put("key", "object0");
test.putAll(original);
assertEquals(2, test.size());
assertEquals(4, test.totalSize());
assertEquals(1, test.getCollection("keyA").size());
assertEquals(3, test.getCollection("key").size());
assertEquals(true, test.containsValue("objectA"));
assertEquals(true, test.containsValue("object0"));
assertEquals(true, test.containsValue("object1"));
assertEquals(true, test.containsValue("object2"));
}
public void testPutAll_Map2() {
Map original = new HashMap();
original.put("keyX", "object1");
original.put("keyY", "object2");
MultiHashMap test = new MultiHashMap();
test.put("keyA", "objectA");
test.put("keyX", "object0");
test.putAll(original);
assertEquals(3, test.size());
assertEquals(4, test.totalSize());
assertEquals(1, test.getCollection("keyA").size());
assertEquals(2, test.getCollection("keyX").size());
assertEquals(1, test.getCollection("keyY").size());
assertEquals(true, test.containsValue("objectA"));
assertEquals(true, test.containsValue("object0"));
assertEquals(true, test.containsValue("object1"));
assertEquals(true, test.containsValue("object2"));
}
public void testPutAll_KeyCollection() {
MultiHashMap map = new MultiHashMap();
Collection coll = Arrays.asList(new Object[] {"X", "Y", "Z"});
assertEquals(true, map.putAll("A", coll));
assertEquals(3, map.size("A"));
assertEquals(true, map.containsValue("A", "X"));
assertEquals(true, map.containsValue("A", "Y"));
assertEquals(true, map.containsValue("A", "Z"));
assertEquals(false, map.putAll("A", null));
assertEquals(3, map.size("A"));
assertEquals(true, map.containsValue("A", "X"));
assertEquals(true, map.containsValue("A", "Y"));
assertEquals(true, map.containsValue("A", "Z"));
assertEquals(false, map.putAll("A", new ArrayList()));
assertEquals(3, map.size("A"));
assertEquals(true, map.containsValue("A", "X"));
assertEquals(true, map.containsValue("A", "Y"));
assertEquals(true, map.containsValue("A", "Z"));
coll = Arrays.asList(new Object[] {"M"});
assertEquals(true, map.putAll("A", coll));
assertEquals(4, map.size("A"));
assertEquals(true, map.containsValue("A", "X"));
assertEquals(true, map.containsValue("A", "Y"));
assertEquals(true, map.containsValue("A", "Z"));
assertEquals(true, map.containsValue("A", "M"));
}
public void testClone() {
MultiHashMap map = new MultiHashMap();
map.put("A", "1");
map.put("A", "2");
Collection coll = (Collection) map.get("A");
assertEquals(1, map.size());
assertEquals(2, coll.size());
MultiHashMap cloned = (MultiHashMap) map.clone();
Collection clonedColl = (Collection) cloned.get("A");
assertNotSame(map, cloned);
assertNotSame(coll, clonedColl);
assertEquals(1, map.size());
assertEquals(2, coll.size());
assertEquals(1, cloned.size());
assertEquals(2, clonedColl.size());
map.put("A", "3");
assertEquals(1, map.size());
assertEquals(3, coll.size());
assertEquals(1, cloned.size());
assertEquals(2, clonedColl.size());
}
public void testConstructorCopy1() {
MultiHashMap map = new MultiHashMap();
map.put("A", "1");
map.put("A", "2");
Collection coll = (Collection) map.get("A");
assertEquals(1, map.size());
assertEquals(2, coll.size());
MultiHashMap newMap = new MultiHashMap(map);
Collection newColl = (Collection) newMap.get("A");
assertNotSame(map, newMap);
assertNotSame(coll, newColl);
assertEquals(1, map.size());
assertEquals(2, coll.size());
assertEquals(1, newMap.size());
assertEquals(2, newColl.size());
map.put("A", "3");
assertEquals(1, map.size());
assertEquals(3, coll.size());
assertEquals(1, newMap.size());
assertEquals(2, newColl.size());
}
public void testConstructorCopy2() {
Map map = new HashMap();
map.put("A", "1");
map.put("B", "2");
assertEquals(2, map.size());
MultiHashMap newMap = new MultiHashMap(map);
Collection newColl = (Collection) newMap.get("A");
assertNotSame(map, newMap);
assertEquals(2, map.size());
assertEquals(2, newMap.size());
assertEquals(1, newColl.size());
map.put("A", "3");
assertEquals(2, map.size());
assertEquals(2, newMap.size());
assertEquals(1, newColl.size());
map.put("C", "4");
assertEquals(3, map.size());
assertEquals(2, newMap.size());
assertEquals(1, newColl.size());
}
public void testRemove_KeyItem() {
MultiHashMap map = new MultiHashMap();
map.put("A", "AA");
map.put("A", "AB");
map.put("A", "AC");
assertEquals(null, map.remove("C", "CA"));
assertEquals(null, map.remove("A", "AD"));
assertEquals("AC", map.remove("A", "AC"));
assertEquals("AB", map.remove("A", "AB"));
assertEquals("AA", map.remove("A", "AA"));
assertEquals(new MultiHashMap(), map);
}
}
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