/*
* 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.tests.java.io;
import junit.framework.TestCase;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.ObjectStreamClass;
import java.io.ObjectStreamField;
import java.io.Serializable;
import java.lang.reflect.Proxy;
public class ObjectStreamClassTest extends TestCase {
static class DummyClass implements Serializable {
private static final long serialVersionUID = 999999999999999L;
long bam = 999L;
int ham = 9999;
public static long getUID() {
return serialVersionUID;
}
}
/**
* java.io.ObjectStreamClass#forClass()
*/
public void test_forClass() {
// Need to test during serialization to be sure an instance is
// returned
ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
assertEquals("forClass returned an object: " + osc.forClass(),
DummyClass.class, osc.forClass());
}
/**
* java.io.ObjectStreamClass#getField(java.lang.String)
*/
public void test_getFieldLjava_lang_String() {
ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
assertEquals("getField did not return correct field", 'J', osc
.getField("bam").getTypeCode());
assertNull("getField did not null for non-existent field", osc
.getField("wham"));
}
/**
* java.io.ObjectStreamClass#getFields()
*/
public void test_getFields() {
ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
ObjectStreamField[] osfArray = osc.getFields();
assertTrue(
"Array of fields should be of length 2 but is instead of length: "
+ osfArray.length, osfArray.length == 2);
}
/**
* java.io.ObjectStreamClass#getName()
*/
public void test_getName() {
ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
assertEquals(
"getName returned incorrect name: " + osc.getName(),
"org.apache.harmony.tests.java.io.ObjectStreamClassTest$DummyClass",
osc.getName());
}
/**
* java.io.ObjectStreamClass#getSerialVersionUID()
*/
public void test_getSerialVersionUID() {
ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
assertTrue("getSerialversionUID returned incorrect uid: "
+ osc.getSerialVersionUID() + " instead of "
+ DummyClass.getUID(), osc.getSerialVersionUID() == DummyClass
.getUID());
}
static class SyntheticTest implements Serializable {
private int i;
private class X implements Serializable {
public int get() {
return i;
}
}
public X foo() {
return new X();
}
}
/**
* java.io.ObjectStreamClass#lookup(java.lang.Class)
*/
public void test_lookupLjava_lang_Class() {
ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
assertEquals(
"lookup returned wrong class: " + osc.getName(),
"org.apache.harmony.tests.java.io.ObjectStreamClassTest$DummyClass",
osc.getName());
}
/**
* java.io.ObjectStreamClass#toString()
*/
public void test_toString() {
ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
String oscString = osc.toString();
// The previous test was more specific than the spec so it was replaced
// with the test below
assertTrue("toString returned incorrect string: " + osc.toString(),
oscString.indexOf("serialVersionUID") >= 0
&& oscString.indexOf("999999999999999L") >= 0);
}
public void testSerialization() {
ObjectStreamClass osc = ObjectStreamClass
.lookup(ObjectStreamClass.class);
assertEquals(0, osc.getFields().length);
}
public void test_specialTypes() {
Class<?> proxyClass = Proxy.getProxyClass(this.getClass()
.getClassLoader(), new Class[] { Runnable.class });
ObjectStreamClass proxyStreamClass = ObjectStreamClass
.lookup(proxyClass);
assertEquals("Proxy classes should have zero serialVersionUID", 0,
proxyStreamClass.getSerialVersionUID());
ObjectStreamField[] proxyFields = proxyStreamClass.getFields();
assertEquals("Proxy classes should have no serialized fields", 0,
proxyFields.length);
ObjectStreamClass enumStreamClass = ObjectStreamClass
.lookup(Thread.State.class);
assertEquals("Enum classes should have zero serialVersionUID", 0,
enumStreamClass.getSerialVersionUID());
ObjectStreamField[] enumFields = enumStreamClass.getFields();
assertEquals("Enum classes should have no serialized fields", 0,
enumFields.length);
}
/**
* @since 1.6
*/
static class NonSerialzableClass {
private static final long serialVersionUID = 1l;
public static long getUID() {
return serialVersionUID;
}
}
/**
* @since 1.6
*/
static class ExternalizableClass implements Externalizable {
private static final long serialVersionUID = -4285635779249689129L;
public void readExternal(ObjectInput input) throws IOException, ClassNotFoundException {
throw new ClassNotFoundException();
}
public void writeExternal(ObjectOutput output) throws IOException {
throw new IOException();
}
}
/**
* java.io.ObjectStreamClass#lookupAny(java.lang.Class)
* @since 1.6
*/
public void test_lookupAnyLjava_lang_Class() {
// Test for method java.io.ObjectStreamClass
// java.io.ObjectStreamClass.lookupAny(java.lang.Class)
ObjectStreamClass osc = ObjectStreamClass.lookupAny(DummyClass.class);
assertEquals("lookup returned wrong class: " + osc.getName(),
"org.apache.harmony.tests.java.io.ObjectStreamClassTest$DummyClass", osc
.getName());
osc = ObjectStreamClass.lookupAny(NonSerialzableClass.class);
assertEquals("lookup returned wrong class: " + osc.getName(),
"org.apache.harmony.tests.java.io.ObjectStreamClassTest$NonSerialzableClass",
osc.getName());
osc = ObjectStreamClass.lookupAny(ExternalizableClass.class);
assertEquals("lookup returned wrong class: " + osc.getName(),
"org.apache.harmony.tests.java.io.ObjectStreamClassTest$ExternalizableClass",
osc.getName());
osc = ObjectStreamClass.lookup(NonSerialzableClass.class);
assertNull(osc);
}
}