Applying a unit test for COLLECTIONS-220. AbstractTestObject is refactored to provide a utility method that serializes and then deserializes. Dave Meikle's fix for said unit test is also applied.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@637495 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/collections/buffer/UnboundedFifoBuffer.java

@@ -115,6 +115,7 @@ public class UnboundedFifoBuffer extends AbstractCollection implements Buffer, S
     private void writeObject(ObjectOutputStream out) throws IOException {
         out.defaultWriteObject();
         out.writeInt(size());
+        out.writeInt(buffer.length);
         for (Iterator it = iterator(); it.hasNext();) {
             out.writeObject(it.next());
         }
@@ -130,7 +131,8 @@ public class UnboundedFifoBuffer extends AbstractCollection implements Buffer, S
     private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
         in.defaultReadObject();
         int size = in.readInt();
-        buffer = new Object[size + 1];
+        int length = in.readInt();
+        buffer = new Object[length];
         for (int i = 0; i < size; i++) {
             buffer[i] = in.readObject();
         }

src/test/org/apache/commons/collections/AbstractTestObject.java

@@ -138,17 +138,23 @@ public abstract class AbstractTestObject extends BulkTest {
         }
     }
 
+    protected Object serializeDeserialize(Object obj) throws Exception {
+        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+        ObjectOutputStream out = new ObjectOutputStream(buffer);
+        out.writeObject(obj);
+        out.close();
+
+        ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buffer.toByteArray()));
+        Object dest = in.readObject();
+        in.close();
+
+        return dest;
+    }
+
     public void testSerializeDeserializeThenCompare() throws Exception {
         Object obj = makeObject();
         if (obj instanceof Serializable && isTestSerialization()) {
-            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
-            ObjectOutputStream out = new ObjectOutputStream(buffer);
-            out.writeObject(obj);
-            out.close();
-
-            ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buffer.toByteArray()));
-            Object dest = in.readObject();
-            in.close();
+            Object dest = serializeDeserialize(obj);
             if (isEqualsCheckable()) {
                 assertEquals("obj != deserialize(serialize(obj))", obj, dest);
             }

src/test/org/apache/commons/collections/buffer/TestUnboundedFifoBuffer.java

@@ -412,6 +412,17 @@ public class TestUnboundedFifoBuffer extends AbstractTestCollection {
         assertEquals(0, test.tail);
     }
 
+    //-----------------------------------------------------------------------
+    public void testCollections220() throws Exception {
+         UnboundedFifoBuffer buffer = new UnboundedFifoBuffer();
+         
+         buffer = (UnboundedFifoBuffer) serializeDeserialize(buffer);
+
+         // test size() gets incremented
+         buffer.add("Foo");
+         assertEquals(1, buffer.size());
+    }
+
     //-----------------------------------------------------------------------
     public String getCompatibilityVersion() {
         return "3.1";