libcore/luni/src/test/java/tests/api/java/io/ObjectStreamClassTest.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 tests.api.java.io;

import dalvik.annotation.TestTargets;
import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetNew;
import dalvik.annotation.TestTargetClass;

import java.io.ObjectStreamClass;
import java.io.ObjectStreamField;
import java.io.Serializable;

@TestTargetClass(ObjectStreamClass.class) 
public class ObjectStreamClassTest extends junit.framework.TestCase {

    static class DummyClass implements Serializable {
        private static final long serialVersionUID = 999999999999999L;

        long bam = 999L;

        int ham = 9999;

        public static long getUID() {
            return serialVersionUID;
        }
    }

    /**
     * @tests java.io.ObjectStreamClass#forClass()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "forClass",
        args = {}
    )      
    public void test_forClass() {
        // Test for method java.lang.Class java.io.ObjectStreamClass.forClass()
        // Need to test during serialization to be sure an instance is
        // returned
        ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
        assertTrue("forClass returned an object: " + osc.forClass(), osc
                .forClass().equals(DummyClass.class));
    }

    /**
     * @tests java.io.ObjectStreamClass#getField(java.lang.String)
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "getField",
        args = {java.lang.String.class}
    )     
    public void test_getFieldLjava_lang_String() {
        // Test for method java.io.ObjectStreamField
        // java.io.ObjectStreamClass.getField(java.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"));
    }

    /**
     * @tests java.io.ObjectStreamClass#getFields()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "getFields",
        args = {}
    )     
    public void test_getFields() {
        // Test for method java.io.ObjectStreamField []
        // java.io.ObjectStreamClass.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);
    }

    /**
     * @tests java.io.ObjectStreamClass#getName()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "getName",
        args = {}
    )    
    public void test_getName() {
        // Test for method java.lang.String java.io.ObjectStreamClass.getName()
        ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
        assertTrue("getName returned incorrect name: " + osc.getName(), osc
                .getName().equals(
                        "tests.api.java.io.ObjectStreamClassTest$DummyClass"));
    }

    /**
     * @tests java.io.ObjectStreamClass#getSerialVersionUID()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "getSerialVersionUID",
        args = {}
    )    
    public void test_getSerialVersionUID() {
        // Test for method long java.io.ObjectStreamClass.getSerialVersionUID()
        ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
        assertTrue("getSerialversionUID returned incorrect uid: "
                + osc.getSerialVersionUID() + " instead of "
                + DummyClass.getUID(), osc.getSerialVersionUID() == DummyClass
                .getUID());
    }

    /**
     * @tests java.io.ObjectStreamClass#lookup(java.lang.Class)
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "lookup",
        args = {java.lang.Class.class}
    )        
    public void test_lookupLjava_lang_Class() {
        // Test for method java.io.ObjectStreamClass
        // java.io.ObjectStreamClass.lookup(java.lang.Class)
        ObjectStreamClass osc = ObjectStreamClass.lookup(DummyClass.class);
        assertTrue("lookup returned wrong class: " + osc.getName(), osc
                .getName().equals(
                        "tests.api.java.io.ObjectStreamClassTest$DummyClass"));
    }

    /**
     * @tests java.io.ObjectStreamClass#toString()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "toString",
        args = {}
    )    
    public void test_toString() {
        // Test for method java.lang.String java.io.ObjectStreamClass.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);
        ;
    }
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "lookup",
        args = {java.lang.Class.class}
    )    
    public void testSerialization() {
        ObjectStreamClass osc = ObjectStreamClass.lookup(ObjectStreamClass.class);
        assertEquals(0, osc.getFields().length);
    }
    
    /**
     * Sets up the fixture, for example, open a network connection. This method
     * is called before a test is executed.
     */
    protected void setUp() {
    }

    /**
     * Tears down the fixture, for example, close a network connection. This
     * method is called after a test is executed.
     */
    protected void tearDown() {
    }

// BEGIN android-added
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies serialization.",
        method = "!Serialization",
        args = {}
    )
    public void testFooSerialVersionUid() {
        assertEquals(-5887964677443030867L, Foo.serialVersionUID());
    }

    /**
     * An arbitrary class which deliberately tickles various factors affecting
     * serialVersionUID calculation.
     */
    static abstract class Foo implements Cloneable, Serializable {

        /** All fields except "private static|transient", which these aren't. */
        private final String name = "foo";
        static final long now;

        /** Presence of static initializer has an affect. */
        static {
            now = System.currentTimeMillis();
        }

        /** Non-private constructors. */
        Foo() {}
        protected Foo(int ignored) {}

        /** Non-private methods. */
        synchronized static int foo() { return 0; }
        static int bar() { return 0; }
        abstract void tee();
        protected native synchronized boolean bob();
        protected synchronized void tim() {}

        /** Calculates Foo's default serialVersionUID. */
        static long serialVersionUID() {
            return ObjectStreamClass.lookup(Foo.class).getSerialVersionUID();
        }
    }

    public static void main(String[] args) {
        System.out.println(Foo.serialVersionUID());
    }
// END android-added
}