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Commons Collections example source code file (TestFactoryUtils.java)

This example Commons Collections source code file (TestFactoryUtils.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

bytearrayoutputstream, bytearrayoutputstream, date, factory, factory, integer, io, mock1, mock2, mock2, mock3, object, object, objectinputstream, objectoutputstream, util

The Commons Collections TestFactoryUtils.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.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Date;
import java.util.TimeZone;

import junit.framework.Test;
import junit.framework.TestSuite;
import junit.textui.TestRunner;

import org.apache.commons.collections.functors.ConstantFactory;

/**
 * Tests the org.apache.commons.collections.FactoryUtils class.
 * 
 * @since Commons Collections 3.0
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 *
 * @author Stephen Colebourne
 */
public class TestFactoryUtils extends junit.framework.TestCase {

    /**
     * Construct
     */
    public TestFactoryUtils(String name) {
        super(name);
    }

    /**
     * Main.
     * @param args
     */    
    public static void main(String[] args) {
        TestRunner.run(suite());
    }

    /**
     * Return class as a test suite.
     */
    public static Test suite() {
        return new TestSuite(TestFactoryUtils.class);
    }

    /**
     * Set up instance variables required by this test case.
     */
    public void setUp() {
    }

    /**
     * Tear down instance variables required by this test case.
     */
    public void tearDown() {
    }

    // exceptionFactory
    //------------------------------------------------------------------

    public void testExceptionFactory() {
        assertNotNull(FactoryUtils.exceptionFactory());
        assertSame(FactoryUtils.exceptionFactory(), FactoryUtils.exceptionFactory());
        try {
            FactoryUtils.exceptionFactory().create();
        } catch (FunctorException ex) {
            try {
                FactoryUtils.exceptionFactory().create();
            } catch (FunctorException ex2) {
                return;
            }
        }
        fail();
    }
    
    // nullFactory
    //------------------------------------------------------------------
    
    public void testNullFactory() {
        Factory factory = FactoryUtils.nullFactory();
        assertNotNull(factory);
        Object created = factory.create();
        assertNull(created);
    }

    // constantFactory
    //------------------------------------------------------------------
    
    public void testConstantFactoryNull() {
        Factory factory = FactoryUtils.constantFactory(null);
        assertNotNull(factory);
        Object created = factory.create();
        assertNull(created);
    }

    public void testConstantFactoryConstant() {
        Integer constant = new Integer(9);
        Factory factory = FactoryUtils.constantFactory(constant);
        assertNotNull(factory);
        Object created = factory.create();
        assertSame(constant, created);
    }

    // prototypeFactory
    //------------------------------------------------------------------
    
    public void testPrototypeFactoryNull() {
        assertSame(ConstantFactory.NULL_INSTANCE, FactoryUtils.prototypeFactory(null));
    }

    public void testPrototypeFactoryPublicCloneMethod() throws Exception {
        Date proto = new Date();
        Factory factory = FactoryUtils.prototypeFactory(proto);
        assertNotNull(factory);
        Object created = factory.create();
        assertTrue(proto != created);
        assertEquals(proto, created);
        
        // check serialisation works
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(buffer);
        out.writeObject(factory);
        out.close();
        ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buffer.toByteArray()));
        Object dest = in.readObject();
        in.close();
    }

    public void testPrototypeFactoryPublicCopyConstructor() throws Exception {
        Mock1 proto = new Mock1(6);
        Factory factory = FactoryUtils.prototypeFactory(proto);
        assertNotNull(factory);
        Object created = factory.create();
        assertTrue(proto != created);
        assertEquals(proto, created);
        
        // check serialisation works
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(buffer);
        try {
            out.writeObject(factory);
        } catch (NotSerializableException ex) {
            out.close();
        }
        factory = FactoryUtils.prototypeFactory(new Mock2("S"));
        buffer = new ByteArrayOutputStream();
        out = new ObjectOutputStream(buffer);
        out.writeObject(factory);
        out.close();
        ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buffer.toByteArray()));
        Object dest = in.readObject();
        in.close();
    }

    public void testPrototypeFactoryPublicSerialization() throws Exception {
        Integer proto = new Integer(9);
        Factory factory = FactoryUtils.prototypeFactory(proto);
        assertNotNull(factory);
        Object created = factory.create();
        assertTrue(proto != created);
        assertEquals(proto, created);
        
        // check serialisation works
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(buffer);
        out.writeObject(factory);
        out.close();
        ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buffer.toByteArray()));
        Object dest = in.readObject();
        in.close();
    }

    public void testPrototypeFactoryPublicSerializationError() {
        Mock2 proto = new Mock2(new Object());
        Factory factory = FactoryUtils.prototypeFactory(proto);
        assertNotNull(factory);
        try {
            Object created = factory.create();
            
        } catch (FunctorException ex) {
            assertTrue(ex.getCause() instanceof IOException);
            return;
        }
        fail();
    }

    public void testPrototypeFactoryPublicBad() {
        Object proto = new Object();
        try {
            Factory factory = FactoryUtils.prototypeFactory(proto);
            
        } catch (IllegalArgumentException ex) {
            return;
        }
        fail();
    }

    public static class Mock1 {
        private final int iVal;
        public Mock1(int val) {
            iVal = val;
        }
        public Mock1(Mock1 mock) {
            iVal = mock.iVal;
        }
        public boolean equals(Object obj) {
            if (obj instanceof Mock1) {
                if (iVal == ((Mock1) obj).iVal) {
                    return true;
                }
            }
            return false;
        }
    }
    
    public static class Mock2 implements Serializable {
        private final Object iVal;
        public Mock2(Object val) {
            iVal = val;
        }
        public boolean equals(Object obj) {
            if (obj instanceof Mock2) {
                if (iVal == ((Mock2) obj).iVal) {
                    return true;
                }
            }
            return false;
        }
    }
    
    public static class Mock3 {
        private static int cCounter = 0;
        private final int iVal;
        public Mock3() {
            iVal = cCounter++;
        }
        public int getValue() {
            return iVal;
        }
    }
    
    // instantiateFactory
    //------------------------------------------------------------------
    
    public void testInstantiateFactoryNull() {
        try {
            Factory factory = FactoryUtils.instantiateFactory(null);
            
        } catch (IllegalArgumentException ex) {
            return;
        }
        fail();
    }

    public void testInstantiateFactorySimple() {
        Factory factory = FactoryUtils.instantiateFactory(Mock3.class);
        assertNotNull(factory);
        Object created = factory.create();
        assertEquals(0, ((Mock3) created).getValue());
        created = factory.create();
        assertEquals(1, ((Mock3) created).getValue());
    }

    public void testInstantiateFactoryMismatch() {
        try {
            Factory factory = FactoryUtils.instantiateFactory(Date.class, null, new Object[] {null});
            
        } catch (IllegalArgumentException ex) {
            return;
        }
        fail();
    }

    public void testInstantiateFactoryNoConstructor() {
        try {
            Factory factory = FactoryUtils.instantiateFactory(Date.class, new Class[] {Long.class}, new Object[] {null});
            
        } catch (IllegalArgumentException ex) {
            return;
        }
        fail();
    }

    public void testInstantiateFactoryComplex() {
        TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
        // 2nd Jan 1970
        Factory factory = FactoryUtils.instantiateFactory(Date.class,
            new Class[] {Integer.TYPE, Integer.TYPE, Integer.TYPE},
            new Object[] {new Integer(70), new Integer(0), new Integer(2)});
        assertNotNull(factory);
        Object created = factory.create();
        assertTrue(created instanceof Date);
        // long time of 1 day (== 2nd Jan 1970)
        assertEquals(new Date(1000 * 60 * 60 * 24), created);
    }

}

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