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Commons Collections example source code file (TestMultiValueMap.java)

This example Commons Collections source code file (TestMultiValueMap.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

a, a, aa, aa, ab, b, b, bc, hashset, multivaluemap, multivaluemap, util, x, y, z

The Commons Collections TestMultiValueMap.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.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;

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

import org.apache.commons.collections.IteratorUtils;
import org.apache.commons.collections.MultiMap;
import org.apache.commons.collections.TestMultiHashMap;

/**
 * TestMultiValueMap.
 *
 * @author <a href="mailto:jcarman@apache.org">James Carman
 * @author Stephen Colebourne
 * @since Commons Collections 3.2
 */
public class TestMultiValueMap extends TestCase {

    public TestMultiValueMap(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);
    }

    public void testNoMappingReturnsNull() {
        final MultiValueMap map = createTestMap();
        assertNull(map.get("whatever"));
    }

    public void testValueCollectionType() {
        final MultiValueMap map = createTestMap(LinkedList.class);
        assertTrue(map.get("one") instanceof LinkedList);
    }

    public void testMultipleValues() {
        final MultiValueMap map = createTestMap(HashSet.class);
        final HashSet expected = new HashSet();
        expected.add("uno");
        expected.add("un");
        assertEquals(expected, map.get("one"));
    }

    public void testContainsValue() {
        final MultiValueMap map = createTestMap(HashSet.class);
        assertTrue(map.containsValue("uno"));
        assertTrue(map.containsValue("un"));
        assertTrue(map.containsValue("dos"));
        assertTrue(map.containsValue("deux"));
        assertTrue(map.containsValue("tres"));
        assertTrue(map.containsValue("trois"));
        assertFalse(map.containsValue("quatro"));
    }

    public void testKeyContainsValue() {
        final MultiValueMap map = createTestMap(HashSet.class);
        assertTrue(map.containsValue("one", "uno"));
        assertTrue(map.containsValue("one", "un"));
        assertTrue(map.containsValue("two", "dos"));
        assertTrue(map.containsValue("two", "deux"));
        assertTrue(map.containsValue("three", "tres"));
        assertTrue(map.containsValue("three", "trois"));
        assertFalse(map.containsValue("four", "quatro"));
    }

    public void testValues() {
        final MultiValueMap map = createTestMap(HashSet.class);
        final HashSet expected = new HashSet();
        expected.add("uno");
        expected.add("dos");
        expected.add("tres");
        expected.add("un");
        expected.add("deux");
        expected.add("trois");
        final Collection c = map.values();
        assertEquals(6, c.size());
        assertEquals(expected, new HashSet(c));
    }

    private MultiValueMap createTestMap() {
        return createTestMap(ArrayList.class);
    }

    private MultiValueMap createTestMap(Class collectionClass) {
        final MultiValueMap map = MultiValueMap.decorate(new HashMap(), collectionClass);
        map.put("one", "uno");
        map.put("one", "un");
        map.put("two", "dos");
        map.put("two", "deux");
        map.put("three", "tres");
        map.put("three", "trois");
        return map;
    }

    public void testKeyedIterator() {
        final MultiValueMap map = createTestMap();
        final ArrayList actual = new ArrayList(IteratorUtils.toList(map.iterator("one")));
        final ArrayList expected = new ArrayList(Arrays.asList(new String[]{"uno", "un"}));
        assertEquals(expected, actual);
    }

    public void testRemoveAllViaIterator() {
        final MultiValueMap map = createTestMap();
        for(Iterator i = map.values().iterator(); i.hasNext();) {
            i.next();
            i.remove();
        }
        assertNull(map.get("one"));
        assertTrue(map.isEmpty());
    }

    public void testRemoveAllViaKeyedIterator() {
        final MultiValueMap map = createTestMap();
        for(Iterator i = map.iterator("one"); i.hasNext();) {
            i.next();
            i.remove();
        }
        assertNull(map.get("one"));
        assertEquals(4, map.totalSize());
    }

    public void testTotalSizeA() {
        assertEquals(6, createTestMap().totalSize());
    }

    //-----------------------------------------------------------------------
    public void testMapEquals() {
        MultiValueMap one = new MultiValueMap();
        Integer value = new Integer(1);
        one.put("One", value);
        one.remove("One", value);
        
        MultiValueMap two = new MultiValueMap();
        assertEquals(two, one);
    }

    //-----------------------------------------------------------------------
    public void testGetCollection() {
        MultiValueMap map = new MultiValueMap();
        map.put("A", "AA");
        assertSame(map.get("A"), map.getCollection("A"));
    }
    
    public void testTotalSize() {
        MultiValueMap map = new MultiValueMap();
        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() {
        MultiValueMap map = new MultiValueMap();
        assertEquals(0, map.size());
        map.put("A", "AA");
        assertEquals(1, map.size());
        map.put("B", "BA");
        assertEquals(2, map.size());
        map.put("B", "BB");
        assertEquals(2, map.size());
        map.put("B", "BC");
        assertEquals(2, map.size());
        map.remove("A");
        assertEquals(2, map.size());
        map.remove("B", "BC");
        assertEquals(2, map.size());
    }
    
    public void testSize_Key() {
        MultiValueMap map = new MultiValueMap();
        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() {
        MultiValueMap map = new MultiValueMap();
        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() {
        MultiValueMap map = new MultiValueMap();
        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 MultiValueMap();
        original.put("key", "object1");
        original.put("key", "object2");

        MultiValueMap test = new MultiValueMap();
        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");

        MultiValueMap test = new MultiValueMap();
        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() {
        MultiValueMap map = new MultiValueMap();
        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 testRemove_KeyItem() {
        MultiValueMap map = new MultiValueMap();
        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 MultiValueMap(), map);
    }

}

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