java/io/ObjectOutputStreamTest.java

/*
 *  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.harmony.luni.tests.java.io;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Externalizable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.NotActiveException;
import java.io.NotSerializableException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamClass;
import java.io.ObjectStreamConstants;
import java.io.ObjectStreamException;
import java.io.ObjectStreamField;
import java.io.OutputStream;
import java.io.Serializable;
import java.io.SerializablePermission;
import java.io.WriteAbortedException;
import java.security.Permission;
import java.util.Arrays;

import junit.framework.TestCase;

@SuppressWarnings( { "unused", "serial" })
public class ObjectOutputStreamTest extends TestCase implements Serializable {

    File f;

    public class SerializableTestHelper implements Serializable {
        public String aField1;

        public String aField2;

        SerializableTestHelper() {
            aField1 = null;
            aField2 = null;
        }

        SerializableTestHelper(String s, String t) {
            aField1 = s;
            aField2 = t;
        }

        private void readObject(ObjectInputStream ois) throws IOException {
            // note aField2 is not read
            try {
                ObjectInputStream.GetField fields = ois.readFields();
                aField1 = (String) fields.get("aField1", "Zap");
            } catch (Exception e) {
            }
        }

        private void writeObject(ObjectOutputStream oos) throws IOException {
            // note aField2 is not written
            ObjectOutputStream.PutField fields = oos.putFields();
            fields.put("aField1", aField1);
            oos.writeFields();
        }

        public String getText1() {
            return aField1;
        }

        public void setText1(String s) {
            aField1 = s;
        }

        public String getText2() {
            return aField2;
        }

        public void setText2(String s) {
            aField2 = s;
        }
    }

    private static class SerializationTest implements java.io.Serializable {
        int anInt = INIT_INT_VALUE;

        public SerializationTest() {
            super();
        }
    }

    private static class SerializationTestSubclass1 extends SerializationTest
            implements Serializable {
        String aString = INIT_STR_VALUE;

        public SerializationTestSubclass1() {
            super();
            // Just to change default superclass init value
            anInt = INIT_INT_VALUE / 2;
        }
    }

    private static class SpecTestSuperClass implements Runnable, Serializable {
        protected java.lang.String instVar;

        public void run() {
        }
    }

    private static class SpecTest extends SpecTestSuperClass implements
            Cloneable, Serializable {
        public java.lang.String instVar1;

        public static java.lang.String staticVar1;

        public static java.lang.String staticVar2;
        {
            instVar1 = "NonStaticInitialValue";
        }
        static {
            staticVar1 = "StaticInitialValue";
            staticVar1 = new String(staticVar1);
        }

        public Object method(Object objParam, Object objParam2) {
            return new Object();
        }

        public boolean method(boolean bParam, Object objParam) {
            return true;
        }

        public boolean method(boolean bParam, Object objParam, Object objParam2) {
            return true;
        }

    }

    private static class SpecTestSubclass extends SpecTest implements
            Serializable {
        public transient java.lang.String transientInstVar = "transientValue";
    }

    private static class ReadWriteObject implements java.io.Serializable {
        public boolean calledWriteObject = false;

        public boolean calledReadObject = false;

        public ReadWriteObject() {
            super();
        }

        private void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            calledReadObject = true;
            in.readObject();
        }

        private void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException {
            calledWriteObject = true;
            out.writeObject(FOO);
        }
    }

    private static class PublicReadWriteObject implements java.io.Serializable {
        public boolean calledWriteObject = false;

        public boolean calledReadObject = false;

        public PublicReadWriteObject() {
            super();
        }

        public void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            calledReadObject = true;
            in.readObject();
        }

        public void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException {
            calledWriteObject = true;
            out.writeObject(FOO);
        }
    }

    private static class FieldOrder implements Serializable {
        String aaa1NonPrimitive = "aaa1";

        int bbb1PrimitiveInt = 5;

        boolean aaa2PrimitiveBoolean = true;

        String bbb2NonPrimitive = "bbb2";
    }

    private static class JustReadObject implements java.io.Serializable {
        public boolean calledReadObject = false;

        public JustReadObject() {
            super();
        }

        private void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            calledReadObject = true;
            in.defaultReadObject();
        }
    }

    private static class JustWriteObject implements java.io.Serializable {
        public boolean calledWriteObject = false;

        public JustWriteObject() {
            super();
        }

        private void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException, ClassNotFoundException {
            calledWriteObject = true;
            out.defaultWriteObject();
        }
    }

    private static class ClassBasedReplacementWhenDumping implements
            java.io.Serializable {
        public boolean calledReplacement = false;

        public ClassBasedReplacementWhenDumping() {
            super();
        }

        private Object writeReplace() {
            calledReplacement = true;
            return FOO; // Replacement is a String
        }
    }

    private static class MultipleClassBasedReplacementWhenDumping implements
            java.io.Serializable {
        private static class C1 implements java.io.Serializable {
            private Object writeReplace() {
                return new C2();
            }
        }

        private static class C2 implements java.io.Serializable {
            private Object writeReplace() {
                return new C3();
            }
        }

        private static class C3 implements java.io.Serializable {
            private Object writeReplace() {
                return FOO;
            }
        }

        public MultipleClassBasedReplacementWhenDumping() {
            super();
        }

        private Object writeReplace() {
            return new C1();
        }
    }

    private static class ClassBasedReplacementWhenLoading implements
            java.io.Serializable {
        public ClassBasedReplacementWhenLoading() {
            super();
        }

        private Object readResolve() {
            return FOO; // Replacement is a String
        }
    }

    private static class ClassBasedReplacementWhenLoadingViolatesFieldType
            implements java.io.Serializable {
        public ClassBasedReplacementWhenLoading classBasedReplacementWhenLoading = new ClassBasedReplacementWhenLoading();

        public ClassBasedReplacementWhenLoadingViolatesFieldType() {
            super();
        }
    }

    private static class MyExceptionWhenDumping implements java.io.Serializable {
        private static class MyException extends java.io.IOException {
        };

        public boolean anInstanceVar = false;

        public MyExceptionWhenDumping() {
            super();
        }

        private void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            in.defaultReadObject();
        }

        private void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException, ClassNotFoundException {
            throw new MyException();
        }
    }

    private static class NonSerializableExceptionWhenDumping implements
            java.io.Serializable {
        public Object anInstanceVar = new Object();

        public NonSerializableExceptionWhenDumping() {
            super();
        }
    }

    private static class MyUnserializableExceptionWhenDumping implements
            java.io.Serializable {
        private static class MyException extends java.io.IOException {
            private Object notSerializable = new Object();
        };

        public boolean anInstanceVar = false;

        public MyUnserializableExceptionWhenDumping() {
            super();
        }

        private void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            in.defaultReadObject();
        }

        private void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException, ClassNotFoundException {
            throw new MyException();
        }
    }

    private static class WithUnmatchingSerialPersistentFields implements
            java.io.Serializable {
        private static final ObjectStreamField[] serialPersistentFields = { new ObjectStreamField(
                "value", String.class) };

        public int anInstanceVar = 5;

        public WithUnmatchingSerialPersistentFields() {
            super();
        }
    }

    private static class WithMatchingSerialPersistentFields implements
            java.io.Serializable {
        private static final ObjectStreamField[] serialPersistentFields = { new ObjectStreamField(
                "anInstanceVar", String.class) };

        public String anInstanceVar = FOO + FOO;

        public WithMatchingSerialPersistentFields() {
            super();
        }
    }

    private static class SerialPersistentFields implements java.io.Serializable {
        private static final String SIMULATED_FIELD_NAME = "text";

        private static final ObjectStreamField[] serialPersistentFields = { new ObjectStreamField(
                SIMULATED_FIELD_NAME, String.class) };

        public int anInstanceVar = 5;

        public SerialPersistentFields() {
            super();
        }

        private void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            ObjectInputStream.GetField fields = in.readFields();
            anInstanceVar = Integer.parseInt((String) fields.get(
                    SIMULATED_FIELD_NAME, "-5"));
        }

        private void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException, ClassNotFoundException {
            ObjectOutputStream.PutField fields = out.putFields();
            fields.put(SIMULATED_FIELD_NAME, Integer.toString(anInstanceVar));
            out.writeFields();
        }
    }

    private static class WriteFieldsWithoutFetchingPutFields implements
            java.io.Serializable {
        private static final String SIMULATED_FIELD_NAME = "text";

        private static final ObjectStreamField[] serialPersistentFields = { new ObjectStreamField(
                SIMULATED_FIELD_NAME, String.class) };

        public int anInstanceVar = 5;

        public WriteFieldsWithoutFetchingPutFields() {
            super();
        }

        private void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            in.readFields();
        }

        private void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException, ClassNotFoundException {
            out.writeFields();
        }
    }

    private static class SerialPersistentFieldsWithoutField implements
            java.io.Serializable {
        public int anInstanceVar = 5;

        public SerialPersistentFieldsWithoutField() {
            super();
        }

        private void readObject(java.io.ObjectInputStream in)
                throws java.io.IOException, ClassNotFoundException {
            in.readFields();
        }

        private void writeObject(java.io.ObjectOutputStream out)
                throws java.io.IOException, ClassNotFoundException {
            out.putFields();
            out.writeFields();
        }
    }

    private static class NotSerializable {
        private int foo;

        public NotSerializable() {
        }

        protected Object writeReplace() throws ObjectStreamException {
            return new Integer(42);
        }
    }

    private static class WriteReplaceObject implements Serializable {
        private Object replaceObject;

        private static enum Color {
            red, blue, green
        };

        public WriteReplaceObject(Object o) {
            replaceObject = o;
        }

        protected Object writeReplace() throws ObjectStreamException {
            return replaceObject;
        }
    }

    private static class ExternalizableWithReplace implements Externalizable {
        private int foo;

        public ExternalizableWithReplace() {
        }

        protected Object writeReplace() throws ObjectStreamException {
            return new Integer(42);
        }

        public void writeExternal(ObjectOutput out) {
        }

        public void readExternal(ObjectInput in) {
        }
    }

    private static class ObjectOutputStreamWithReplace extends
            ObjectOutputStream {
        public ObjectOutputStreamWithReplace(OutputStream out)
                throws IOException {
            super(out);
            enableReplaceObject(true);
        }

        protected Object replaceObject(Object obj) throws IOException {
            if (obj instanceof NotSerializable) {
                return new Long(10);
            }
            if (obj instanceof Integer) {
                return new Long(((Integer) obj).longValue());
            }
            return super.replaceObject(obj);
        }
    }

    private static class ObjectOutputStreamWithReplace2 extends
            ObjectOutputStream {
        public ObjectOutputStreamWithReplace2(OutputStream out)
                throws IOException {
            super(out);
            enableReplaceObject(true);
        }

        protected Object replaceObject(Object obj) throws IOException {
            return new Long(10);
        }
    }

    private static class ObjectOutputStreamWriteOverride extends
            ObjectOutputStream {
        String test = "test";

        protected ObjectOutputStreamWriteOverride() throws IOException,
                SecurityException {
            super();
        }

        @Override
        protected void writeObjectOverride(Object object) throws IOException {
            test = null;
            super.writeObjectOverride(object);
        }
    }

    protected static final String MODE_XLOAD = "xload";

    protected static final String MODE_XDUMP = "xdump";

    static final String FOO = "foo";

    static final String MSG_WITE_FAILED = "Failed to write: ";

    private static final boolean DEBUG = false;

    protected static boolean xload = false;

    protected static boolean xdump = false;

    protected static String xFileName = null;

    protected ObjectInputStream ois;

    protected ObjectOutputStream oos;

    protected ByteArrayOutputStream bao;

    static final int INIT_INT_VALUE = 7;

    static final String INIT_STR_VALUE = "a string that is blortz";

    /**
     * @tests java.io.ObjectOutputStream#ObjectOutputStream(java.io.OutputStream)
     */
    public void test_ConstructorLjava_io_OutputStream() throws IOException {
        // Test for method java.io.ObjectOutputStream(java.io.OutputStream)
        oos.close();
        oos = new ObjectOutputStream(new ByteArrayOutputStream());
        oos.close();
    }

    /**
     * @tests java.io.ObjectOutputStream#close()
     */
    public void test_close() {
        // Test for method void java.io.ObjectOutputStream.close()
    }

    /**
     * @tests java.io.ObjectOutputStream#defaultWriteObject()
     */
    public void test_defaultWriteObject() throws IOException {
        // Test for method void java.io.ObjectOutputStream.defaultWriteObject()
        try {
            oos.defaultWriteObject();
            fail("Failed to throw NotActiveException");
        } catch (NotActiveException e) {
            // Correct
        }
    }

    /**
     * @tests java.io.ObjectOutputStream#flush()
     */
    public void test_flush() throws Exception {
        // Test for method void java.io.ObjectOutputStream.flush()
        int size = bao.size();
        oos.writeByte(127);
        assertTrue("Data flushed already", bao.size() == size);
        oos.flush();
        assertTrue("Failed to flush data", bao.size() > size);
        // we don't know how many bytes are actually written for 1
        // byte, so we test > <before>
        oos.close();
        oos = null;
    }

    /**
     * @tests java.io.ObjectOutputStream#putFields()
     */
    public void test_putFields() throws Exception {
        // Test for method java.io.ObjectOutputStream$PutField
        // java.io.ObjectOutputStream.putFields()

        SerializableTestHelper sth;

        /*
         * "SerializableTestHelper" is an object created for these tests with
         * two fields (Strings) and simple implementations of readObject and
         * writeObject which simply read and write the first field but not the
         * second
         */

        oos.writeObject(new SerializableTestHelper("Gabba", "Jabba"));
        oos.flush();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        sth = (SerializableTestHelper) (ois.readObject());
        assertEquals("readFields / writeFields failed--first field not set",
                "Gabba", sth.getText1());
        assertNull(
                "readFields / writeFields failed--second field should not have been set",
                sth.getText2());
    }

    /**
     * @tests java.io.ObjectOutputStream#reset()
     */
    public void test_reset() throws Exception {
        // Test for method void java.io.ObjectOutputStream.reset()
        String o = "HelloWorld";
        oos.writeObject(o);
        oos.writeObject(o);
        oos.reset();
        oos.writeObject(o);
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        ois.close();
    }

    private static class ExternalTest implements Externalizable {
        public String value;

        public ExternalTest() {
        }

        public void setValue(String val) {
            value = val;
        }

        public String getValue() {
            return value;
        }

        public void writeExternal(ObjectOutput output) {
            try {
                output.writeUTF(value);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        public void readExternal(ObjectInput input) {
            try {
                value = input.readUTF();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * @tests java.io.ObjectOutputStream#useProtocolVersion(int)
     */
    public void test_useProtocolVersionI() throws Exception {
        // Test for method void
        // java.io.ObjectOutputStream.useProtocolVersion(int)
        oos.useProtocolVersion(ObjectOutputStream.PROTOCOL_VERSION_1);
        ExternalTest t1 = new ExternalTest();
        t1.setValue("hello1");
        oos.writeObject(t1);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        ExternalTest t2 = (ExternalTest) ois.readObject();
        ois.close();
        assertTrue(
                "Cannot read/write PROTOCAL_VERSION_1 Externalizable objects: "
                        + t2.getValue(), t1.getValue().equals(t2.getValue()));

        // Cannot set protocol version when stream in-flight
        ObjectOutputStream out = new ObjectOutputStream(
                new ByteArrayOutputStream());
        out.writeObject("hello world");
        try {
            out.useProtocolVersion(ObjectStreamConstants.PROTOCOL_VERSION_1);
            fail("Expected IllegalStateException");
        } catch (IllegalStateException e) {
            // Expected
        }
    }

    /**
     * @tests java.io.ObjectOutputStream#write(byte[])
     */
    public void test_write$B() throws Exception {
        // Test for method void java.io.ObjectOutputStream.write(byte [])
        byte[] buf = new byte[10];
        oos.write("HelloWorld".getBytes());
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        ois.read(buf, 0, 10);
        ois.close();
        assertEquals("Read incorrect bytes", "HelloWorld", new String(buf, 0,
                10));
    }

    /**
     * @tests java.io.ObjectOutputStream#write(byte[], int, int)
     */
    public void test_write$BII() throws Exception {
        // Test for method void java.io.ObjectOutputStream.write(byte [], int,
        // int)
        byte[] buf = new byte[10];
        oos.write("HelloWorld".getBytes(), 0, 10);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        ois.read(buf, 0, 10);
        ois.close();
        assertEquals("Read incorrect bytes", "HelloWorld", new String(buf, 0,
                10));
    }

    /**
     * @tests java.io.ObjectOutputStream#write(int)
     */
    public void test_writeI() throws Exception {
        // Test for method void java.io.ObjectOutputStream.write(int)
        oos.write('T');
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertEquals("Read incorrect byte", 'T', ois.read());
        ois.close();
    }

    /**
     * @tests java.io.ObjectOutputStream#writeBoolean(boolean)
     */
    public void test_writeBooleanZ() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeBoolean(boolean)
        oos.writeBoolean(true);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertTrue("Wrote incorrect byte value", ois.readBoolean());
    }

    /**
     * @tests java.io.ObjectOutputStream#writeByte(int)
     */
    public void test_writeByteI() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeByte(int)
        oos.writeByte(127);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertEquals("Wrote incorrect byte value", 127, ois.readByte());
    }

    /**
     * @tests java.io.ObjectOutputStream#writeBytes(java.lang.String)
     */
    public void test_writeBytesLjava_lang_String() throws Exception {
        // Test for method void
        // java.io.ObjectOutputStream.writeBytes(java.lang.String)
        byte[] buf = new byte[10];
        oos.writeBytes("HelloWorld");
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        ois.readFully(buf);
        ois.close();
        assertEquals("Wrote incorrect bytes value", "HelloWorld", new String(
                buf, 0, 10, "UTF-8"));
    }

    /**
     * @tests java.io.ObjectOutputStream#writeChar(int)
     */
    public void test_writeCharI() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeChar(int)
        oos.writeChar('T');
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertEquals("Wrote incorrect char value", 'T', ois.readChar());
    }

    /**
     * @tests java.io.ObjectOutputStream#writeChars(java.lang.String)
     */
    public void test_writeCharsLjava_lang_String() throws Exception {
        // Test for method void
        // java.io.ObjectOutputStream.writeChars(java.lang.String)
        int avail = 0;
        char[] buf = new char[10];
        oos.writeChars("HelloWorld");
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        // Number of prim data bytes in stream / 2 to give char index
        avail = ois.available() / 2;
        for (int i = 0; i < avail; ++i)
            buf[i] = ois.readChar();
        ois.close();
        assertEquals("Wrote incorrect chars", "HelloWorld", new String(buf, 0,
                10));
    }

    /**
     * @tests java.io.ObjectOutputStream#writeDouble(double)
     */
    public void test_writeDoubleD() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeDouble(double)
        oos.writeDouble(Double.MAX_VALUE);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertTrue("Wrote incorrect double value",
                ois.readDouble() == Double.MAX_VALUE);
    }

    /**
     * @tests java.io.ObjectOutputStream#writeFields()
     */
    public void test_writeFields() {
        // Test for method void java.io.ObjectOutputStream.writeFields()
        assertTrue("Used to test", true);
    }

    /**
     * @tests java.io.ObjectOutputStream#writeFloat(float)
     */
    public void test_writeFloatF() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeFloat(float)
        oos.writeFloat(Float.MAX_VALUE);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertTrue("Wrote incorrect double value",
                ois.readFloat() == Float.MAX_VALUE);
        ois.close();
        ois = null;
    }

    /**
     * @tests java.io.ObjectOutputStream#writeInt(int)
     */
    public void test_writeIntI() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeInt(int)
        oos.writeInt(Integer.MAX_VALUE);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertTrue("Wrote incorrect double value",
                ois.readInt() == Integer.MAX_VALUE);
        ois.close();
    }

    /**
     * @tests java.io.ObjectOutputStream#writeLong(long)
     */
    public void test_writeLongJ() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeLong(long)
        oos.writeLong(Long.MAX_VALUE);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertTrue("Wrote incorrect double value",
                ois.readLong() == Long.MAX_VALUE);
    }

    /**
     * @tests java.io.ObjectOutputStream#writeObject(java.lang.Object)
     */
    public void test_writeObjectLjava_lang_Object() throws Exception {
        // Test for method void
        // java.io.ObjectOutputStream.writeObject(java.lang.Object)

        Object objToSave = null;
        Object objLoaded;

        SerialPersistentFieldsWithoutField spf = new SerialPersistentFieldsWithoutField();
        final int CONST = -500;
        spf.anInstanceVar = CONST;
        objToSave = spf;
        if (DEBUG)
            System.out.println("Obj = " + objToSave);
        objLoaded = dumpAndReload(objToSave);
        assertTrue(
                "serialPersistentFields do not work properly in this implementation",
                ((SerialPersistentFieldsWithoutField) objLoaded).anInstanceVar != CONST);

    }

    /**
     * @tests java.io.ObjectOutputStream#writeObject(java.lang.Object)
     */
    public void test_writeObject_NotSerializable() throws Exception {
        ObjectOutput out = null;
        try {
            out = new ObjectOutputStream(new ByteArrayOutputStream());
            out.writeObject(new NotSerializable());
            fail("Expected NotSerializableException");
        } catch (NotSerializableException e) {
        }
        out.writeObject(new ExternalizableWithReplace());
    }

    /**
     * @tests {@link java.io.ObjectOutputStream#writeObjectOverride(Object)}
     */
    public void test_writeObject_WriteOverride() throws Exception {
        ObjectOutputStreamWriteOverride mockOut = new ObjectOutputStreamWriteOverride();
        mockOut.writeObject(new Object());
        assertNull(mockOut.test);
    }

    /**
     * @tests java.io.ObjectOutputStream#writeShort(int)
     */
    public void test_writeShortI() throws Exception {
        // Test for method void java.io.ObjectOutputStream.writeShort(int)
        oos.writeShort(127);
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertEquals("Wrote incorrect short value", 127, ois.readShort());
    }

    /**
     * @tests java.io.ObjectOutputStream#writeUTF(java.lang.String)
     */
    public void test_writeUTFLjava_lang_String() throws Exception {
        // Test for method void
        // java.io.ObjectOutputStream.writeUTF(java.lang.String)
        oos.writeUTF("HelloWorld");
        oos.close();
        ois = new ObjectInputStream(new ByteArrayInputStream(bao.toByteArray()));
        assertEquals("Wrote incorrect UTF value", "HelloWorld", ois.readUTF());
    }

    /**
     * @tests java.io.ObjectOutputStream#writeObject(java.lang.Object)
     */
    public void test_writeObject_Exception() throws ClassNotFoundException,
            IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
        ObjectOutputStream oos = new ObjectOutputStream(baos);

        try {
            oos.writeObject(new Object());
            fail("should throw ObjectStreamException");
        } catch (ObjectStreamException e) {
            // expected
        } finally {
            oos.close();
            baos.close();
        }

        byte[] bytes = baos.toByteArray();
        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(
                bytes));
        try {
            ois.readObject();
            fail("should throw WriteAbortedException");
        } catch (WriteAbortedException e) {
            // expected
        } finally {
            ois.close();
        }
    }

    /**
     * @tests {@link java.io.ObjectOutputStream#annotateProxyClass(java.lang.Class<T>)}
     */
    public void test_annotateProxyClass() throws SecurityException, IOException {
        MockObjectOutputStream mockObjectOutputStream = new MockObjectOutputStream();
        mockObjectOutputStream.annotateProxyClass(this.getClass());
        assertEquals("The default implementation is doing nothing.",
                mockObjectOutputStream, mockObjectOutputStream);

    }

    class MockObjectOutputStream extends ObjectOutputStream {

        protected MockObjectOutputStream() throws IOException,
                SecurityException {
            super();
        }

        @Override
        public void annotateProxyClass(Class<?> aClass) throws IOException {
            super.annotateProxyClass(aClass);
        }

    }

    /**
     * Sets up the fixture, for example, open a network connection. This method
     * is called before a test is executed.
     */
    protected void setUp() throws Exception {
        super.setUp();
        oos = new ObjectOutputStream(bao = new ByteArrayOutputStream());
    }

    /**
     * Tears down the fixture, for example, close a network connection. This
     * method is called after a test is executed.
     */
    protected void tearDown() throws Exception {
        super.tearDown();
        if (oos != null) {
            try {
                oos.close();
            } catch (Exception e) {
            }
        }
        if (f != null && f.exists()) {
            if (!f.delete()) {
                fail("Error cleaning up files during teardown");
            }
        }
    }

    protected Object reload() throws IOException, ClassNotFoundException {

        // Choose the load stream
        if (xload || xdump) {
            // Load from pre-existing file
            ois = new ObjectInputStream(new FileInputStream(xFileName + "-"
                    + getName() + ".ser"));
        } else {
            // Just load from memory, we dumped to memory
            ois = new ObjectInputStream(new ByteArrayInputStream(bao
                    .toByteArray()));
        }

        try {
            return ois.readObject();
        } finally {
            ois.close();
        }
    }

    protected void dump(Object o) throws IOException, ClassNotFoundException {

        // Choose the dump stream
        if (xdump) {
            oos = new ObjectOutputStream(new FileOutputStream(
                    f = new java.io.File(xFileName + "-" + getName() + ".ser")));
        } else {
            oos = new ObjectOutputStream(bao = new ByteArrayOutputStream());
        }

        // Dump the object
        try {
            oos.writeObject(o);
        } finally {
            oos.close();
        }
    }

    /**
     * @tests java.io.ObjectOutputStream#writeInt(int)
     * @tests java.io.ObjectOutputStream#writeObject(java.lang.Object)
     * @tests java.io.ObjectOutputStream#writeUTF(java.lang.String)
     */

    public void testMixPrimitivesAndObjects() throws Exception {
        int i = 7;
        String s1 = "string 1";
        String s2 = "string 2";
        byte[] bytes = { 1, 2, 3 };
        try {
            oos = new ObjectOutputStream(bao = new ByteArrayOutputStream());
            oos.writeInt(i);
            oos.writeObject(s1);
            oos.writeUTF(s2);
            oos.writeObject(bytes);
            oos.close();

            ois = new ObjectInputStream(new ByteArrayInputStream(bao
                    .toByteArray()));

            int j = ois.readInt();
            assertTrue("Wrong int :" + j, i == j);

            String l1 = (String) ois.readObject();
            assertTrue("Wrong obj String :" + l1, s1.equals(l1));

            String l2 = ois.readUTF();
            assertTrue("Wrong UTF String :" + l2, s2.equals(l2));

            byte[] bytes2 = (byte[]) ois.readObject();
            assertTrue("Wrong byte[]", Arrays.equals(bytes, bytes2));
        } finally {
            try {
                if (oos != null)
                    oos.close();
                if (ois != null)
                    ois.close();
            } catch (IOException e) {
            }
        }
    }

    /**
     * @tests java.io.ObjectOutputStream#writeUnshared(java.lang.Object)
     */
    public void test_writeUnshared() throws Exception {
        // Regression for HARMONY-187
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);

        Object o = "foobar";
        oos.writeObject(o);
        oos.writeUnshared(o);
        oos.writeObject(o);
        oos.flush();

        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(
                baos.toByteArray()));

        Object[] oa = new Object[3];
        for (int i = 0; i < oa.length; i++) {
            oa[i] = ois.readObject();
        }

        oos.close();
        ois.close();

        // All three conditions must be met
        assertNotSame("oa[0] != oa[1]", oa[0], oa[1]);
        assertNotSame("oa[1] != oa[2]", oa[1], oa[2]);
        assertSame("oa[0] == oa[2]", oa[0], oa[2]);
    }

    /**
     * @tests java.io.ObjectOutputStream#writeUnshared(java.lang.Object)
     */
    public void test_writeUnshared2() throws Exception {
        // Regression for HARMONY-187
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);

        Object o = new Object[1];
        oos.writeObject(o);
        oos.writeUnshared(o);
        oos.writeObject(o);
        oos.flush();

        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(
                baos.toByteArray()));

        Object[] oa = new Object[3];
        for (int i = 0; i < oa.length; i++) {
            oa[i] = ois.readObject();
        }

        oos.close();
        ois.close();

        // All three conditions must be met
        assertNotSame("oa[0] != oa[1]", oa[0], oa[1]);
        assertNotSame("oa[1] != oa[2]", oa[1], oa[2]);
        assertSame("oa[0] == oa[2]", oa[0], oa[2]);
    }

    protected Object dumpAndReload(Object o) throws IOException,
            ClassNotFoundException {
        dump(o);
        return reload();
    }

    /**
     * @tests java.io.ObjectOutputStream#useProtocolVersion(int)
     */
    public void test_useProtocolVersionI_2() throws Exception {
        ObjectOutputStream oos = new ObjectOutputStream(
                new ByteArrayOutputStream());

        oos.useProtocolVersion(ObjectOutputStream.PROTOCOL_VERSION_1);
        oos.useProtocolVersion(ObjectOutputStream.PROTOCOL_VERSION_2);
        try {
            oos.useProtocolVersion(3);
            fail("Protocol 3 should not be accepted");
        } catch (IllegalArgumentException e) {
            // expected
        } finally {
            oos.close();
        }
    }

    /**
     * @tests java.io.ObjectOutputStream#replaceObject(java.lang.Object)
     */
    public void test_replaceObject() throws Exception {
        // Regression for HARMONY-1429
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStreamWithReplace oos = new ObjectOutputStreamWithReplace(
                baos);

        oos.writeObject(new NotSerializable());
        oos.flush();
        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(
                baos.toByteArray()));
        Object obj = ois.readObject();
        oos.close();
        ois.close();
        assertTrue("replaceObject has not been called", (obj instanceof Long));

        // Regression for HARMONY-2239
        Object replaceObject = int.class;
        baos = new ByteArrayOutputStream();
        ObjectOutputStreamWithReplace2 oos2 = new ObjectOutputStreamWithReplace2(
                baos);
        oos2.writeObject(new WriteReplaceObject(replaceObject));
        oos2.flush();
        ois = new ObjectInputStream(
                new ByteArrayInputStream(baos.toByteArray()));
        obj = ois.readObject();
        oos.close();
        ois.close();
        assertTrue("replaceObject has not been called", (obj instanceof Long));

        replaceObject = ObjectStreamClass.lookup(Integer.class);
        baos = new ByteArrayOutputStream();
        oos2 = new ObjectOutputStreamWithReplace2(baos);
        oos2.writeObject(new WriteReplaceObject(replaceObject));
        oos2.flush();
        ois = new ObjectInputStream(
                new ByteArrayInputStream(baos.toByteArray()));
        obj = ois.readObject();
        oos.close();
        ois.close();
        assertTrue("replaceObject has not been called", (obj instanceof Long));

        replaceObject = WriteReplaceObject.Color.red;
        baos = new ByteArrayOutputStream();
        oos2 = new ObjectOutputStreamWithReplace2(baos);
        oos2.writeObject(new WriteReplaceObject(replaceObject));
        oos2.flush();
        ois = new ObjectInputStream(
                new ByteArrayInputStream(baos.toByteArray()));
        obj = ois.readObject();
        oos.close();
        ois.close();
        assertTrue("replaceObject has not been called", (obj instanceof Long));

        // Regression for HARMONY-3158
        Object obj1;
        Object obj2;
        Object obj3;

        baos = new ByteArrayOutputStream();
        oos = new ObjectOutputStreamWithReplace(baos);

        oos.writeObject(new Integer(99));
        oos.writeObject(Integer.class);
        oos.writeObject(ObjectStreamClass.lookup(Integer.class));
        oos.flush();

        ois = new ObjectInputStream(
                new ByteArrayInputStream(baos.toByteArray()));
        obj1 = ois.readObject();
        obj2 = ois.readObject();
        obj3 = ois.readObject();
        oos.close();
        ois.close();

        assertTrue("1st replaceObject worked incorrectly", obj1 instanceof Long);
        assertEquals("1st replaceObject worked incorrectly", 99, ((Long) obj1)
                .longValue());
        assertEquals("2nd replaceObject worked incorrectly", Integer.class,
                obj2);
        assertEquals("3rd replaceObject worked incorrectly",
                ObjectStreamClass.class, obj3.getClass());
    }

    public void test_putFieldWrite() throws Exception {
        // Regression test for HARMONY-6483
        ObjectOutputStream oos = new ObjectOutputStream(new ByteArrayOutputStream());
        try {
            oos.writeObject(new OutputObject());
            fail("Should throw an IllegalArgumentException");
        } catch (IllegalArgumentException iae) {
            // Expected
        }
    }

    private static class OutputObject implements Serializable {
        private void writeObject(ObjectOutputStream oos) throws IOException {
            ObjectOutputStream oos2 = new ObjectOutputStream(new ByteArrayOutputStream());
            ObjectOutputStream.PutField putField = oos.putFields();
            putField.write(oos2);
        }
    }
}