Added an AbstractQueueTest as base class for all queue tests.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1475974 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/commons/collections4/queue/AbstractQueueTest.java

@@ -0,0 +1,209 @@
+/*
+ * 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.collections4.queue;
+
+import java.io.IOException;
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Queue;
+
+import org.apache.commons.collections4.collection.AbstractCollectionTest;
+
+/**
+ * Abstract test class for {@link java.util.Queue} methods and contracts.
+ * <p>
+ * To use, simply extend this class, and implement
+ * the {@link #makeObject} method.
+ * <p>
+ * If your {@link Queue} fails one of these tests by design,
+ * you may still use this base set of cases.  Simply override the
+ * test case (method) your {@link Queue} fails or override one of the
+ * protected methods from AbstractCollectionTest.
+ *
+ * @since 4.0
+ * @version $Id$
+ */
+public abstract class AbstractQueueTest<E> extends AbstractCollectionTest<E> {
+
+    /**
+     * JUnit constructor.
+     *
+     * @param testName  the test class name
+     */
+    public AbstractQueueTest(final String testName) {
+        super(testName);
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     *  Returns true if the collections produced by
+     *  {@link #makeObject()} and {@link #makeFullCollection()}
+     *  support the <code>set operation.<p>
+     *  Default implementation returns true.  Override if your collection
+     *  class does not support set.
+     */
+    public boolean isSetSupported() {
+        return true;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     *  Verifies that the test queue implementation matches the confirmed queue
+     *  implementation.
+     */
+    @Override
+    public void verify() {
+        super.verify();
+        final Iterator<E> iterator1 = getCollection().iterator();
+        final Iterator<E> iterator2 = getConfirmed().iterator();
+        while (iterator2.hasNext()) {
+            assertTrue(iterator1.hasNext());
+            final Object o1 = iterator1.next();
+            final Object o2 = iterator2.next();
+            assertEquals(o1, o2);
+        }
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * Returns an empty {@link ArrayList}.
+     */
+    @Override
+    public Collection<E> makeConfirmedCollection() {
+        final ArrayList<E> list = new ArrayList<E>();
+        return list;
+    }
+
+    /**
+     * Returns a full {@link ArrayList}.
+     */
+    @Override
+    public Collection<E> makeConfirmedFullCollection() {
+        final ArrayList<E> list = new ArrayList<E>();
+        list.addAll(Arrays.asList(getFullElements()));
+        return list;
+    }
+
+    /**
+     * Returns {@link #makeObject()}.
+     *
+     * @return an empty queue to be used for testing
+     */
+    @Override
+    public abstract Queue<E> makeObject();
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public Queue<E> makeFullCollection() {
+        // only works if queue supports optional "addAll(Collection)"
+        final Queue<E> queue = makeObject();
+        queue.addAll(Arrays.asList(getFullElements()));
+        return queue;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * Returns the {@link #collection} field cast to a {@link Queue}.
+     *
+     * @return the collection field as a Queue
+     */
+    @Override
+    public Queue<E> getCollection() {
+        return (Queue<E>) super.getCollection();
+    }
+
+    //-----------------------------------------------------------------------
+    @SuppressWarnings("unchecked")
+    public void testEmptyQueueSerialization() throws IOException, ClassNotFoundException {
+        final Queue<E> queue = makeObject();
+        if (!(queue instanceof Serializable && isTestSerialization())) {
+            return;
+        }
+
+        final byte[] objekt = writeExternalFormToBytes((Serializable) queue);
+        final Queue<E> queue2 = (Queue<E>) readExternalFormFromBytes(objekt);
+
+        assertEquals("Both queues are empty", 0, queue.size());
+        assertEquals("Both queues are empty", 0, queue2.size());
+    }
+
+    @SuppressWarnings("unchecked")
+    public void testFullQueueSerialization() throws IOException, ClassNotFoundException {
+        final Queue<E> queue = makeFullCollection();
+        final int size = getFullElements().length;
+        if (!(queue instanceof Serializable && isTestSerialization())) {
+            return;
+        }
+
+        final byte[] objekt = writeExternalFormToBytes((Serializable) queue);
+        final Queue<E> queue2 = (Queue<E>) readExternalFormFromBytes(objekt);
+
+        assertEquals("Both queues are same size", size, queue.size());
+        assertEquals("Both queues are same size", size, queue2.size());
+    }
+
+    /**
+     * Compare the current serialized form of the Queue
+     * against the canonical version in SVN.
+     */
+    @SuppressWarnings("unchecked")
+    public void testEmptyQueueCompatibility() throws IOException, ClassNotFoundException {
+        /**
+         * Create canonical objects with this code
+        Queue queue = makeEmptyQueue();
+        if (!(queue instanceof Serializable)) return;
+
+        writeExternalFormToDisk((Serializable) queue, getCanonicalEmptyCollectionName(queue));
+        */
+
+        // test to make sure the canonical form has been preserved
+        final Queue<E> queue = makeObject();
+        if (queue instanceof Serializable && !skipSerializedCanonicalTests()
+                && isTestSerialization()) {
+            final Queue<E> queue2 = (Queue<E>) readExternalFormFromDisk(getCanonicalEmptyCollectionName(queue));
+            assertEquals("Queue is empty", 0, queue2.size());
+        }
+    }
+
+    /**
+     * Compare the current serialized form of the Queue
+     * against the canonical version in SVN.
+     */
+    @SuppressWarnings("unchecked")
+    public void testFullQueueCompatibility() throws IOException, ClassNotFoundException {
+        /**
+         * Create canonical objects with this code
+        Queue queue = makeFullQueue();
+        if (!(queue instanceof Serializable)) return;
+
+        writeExternalFormToDisk((Serializable) queue, getCanonicalFullCollectionName(queue));
+        */
+
+        // test to make sure the canonical form has been preserved
+        final Queue<E> queue = makeFullCollection();
+        if(queue instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
+            final Queue<E> queue2 = (Queue<E>) readExternalFormFromDisk(getCanonicalFullCollectionName(queue));
+            assertEquals("Queues is the right size",queue.size(), queue2.size());
+        }
+    }
+
+}

src/test/java/org/apache/commons/collections4/queue/CircularFifoQueueTest.java

@@ -27,25 +27,16 @@ import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Queue;
 
-import junit.framework.Test;
-
-import org.apache.commons.collections4.BulkTest;
-import org.apache.commons.collections4.collection.AbstractCollectionTest;
-
 /**
  * Test cases for CircularFifoQueue.
  *
  * @since 4.0
  * @version $Id$
  */
-public class CircularFifoQueueTest<E> extends AbstractCollectionTest<E> {
+public class CircularFifoQueueTest<E> extends AbstractQueueTest<E> {
 
-    public CircularFifoQueueTest(final String n) {
-        super(n);
-    }
-
-    public static Test suite() {
-        return BulkTest.makeSuite(CircularFifoQueueTest.class);
+    public CircularFifoQueueTest(final String testName) {
+        super(testName);
     }
 
     //-----------------------------------------------------------------------
@@ -115,7 +106,7 @@ public class CircularFifoQueueTest<E> extends AbstractCollectionTest<E> {
      * @return an empty CircularFifoQueue
      */
     @Override
-    public Collection<E> makeObject() {
+    public Queue<E> makeObject() {
         return new CircularFifoQueue<E>(100);
     }
 
@@ -156,7 +147,7 @@ public class CircularFifoQueueTest<E> extends AbstractCollectionTest<E> {
         final int size = getConfirmed().size();
         for (int i = 0; i < size; i++) {
             final Object o1 = getCollection().remove();
-            final Object o2 = getConfirmed().remove(0);
+            final Object o2 = ((List<?>) getConfirmed()).remove(0);
             assertEquals("Removed objects should be equal", o1, o2);
             verify();
         }
@@ -419,7 +410,7 @@ public class CircularFifoQueueTest<E> extends AbstractCollectionTest<E> {
         resetFull();
         
         final CircularFifoQueue<E> queue = getCollection();
-        final List<E> confirmed = getConfirmed();
+        final List<E> confirmed = (List<E>) getConfirmed();
         for (int i = 0; i < confirmed.size(); i++) {
             assertEquals(confirmed.get(i), queue.get(i));
         }
@@ -453,11 +444,4 @@ public class CircularFifoQueueTest<E> extends AbstractCollectionTest<E> {
         return (CircularFifoQueue<E>) super.getCollection();
     }
 
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    public List<E> getConfirmed() {
-        return (List<E>) super.getConfirmed();
-    }
 }

src/test/java/org/apache/commons/collections4/queue/PredicatedQueueTest.java

@@ -24,6 +24,7 @@ import java.util.Queue;
 
 import org.apache.commons.collections4.Predicate;
 import org.apache.commons.collections4.collection.PredicatedCollectionTest;
+import org.apache.commons.collections4.functors.TruePredicate;
 
 /**
  * Extension of {@link PredicatedCollectionTest} for exercising the
@@ -32,7 +33,7 @@ import org.apache.commons.collections4.collection.PredicatedCollectionTest;
  * @since 4.0
  * @version $Id$
  */
-public class PredicatedQueueTest<E> extends PredicatedCollectionTest<E> {
+public class PredicatedQueueTest<E> extends AbstractQueueTest<E> {
 
     public PredicatedQueueTest(final String testName) {
         super(testName);
@@ -40,6 +41,8 @@ public class PredicatedQueueTest<E> extends PredicatedCollectionTest<E> {
 
     //---------------------------------------------------------------
 
+    protected Predicate<E> truePredicate = TruePredicate.<E>truePredicate();
+
     protected Queue<E> decorateCollection(final Queue<E> queue, final Predicate<E> predicate) {
         return PredicatedQueue.predicatedQueue(queue, predicate);
     }
@@ -50,7 +53,7 @@ public class PredicatedQueueTest<E> extends PredicatedCollectionTest<E> {
     }
     
     @Override
-    public Collection<E> makeFullCollection() {
+    public Queue<E> makeFullCollection() {
         final Queue<E> queue = new LinkedList<E>();
         queue.addAll(Arrays.asList(getFullElements()));
         return decorateCollection(queue, truePredicate);
@@ -70,6 +73,13 @@ public class PredicatedQueueTest<E> extends PredicatedCollectionTest<E> {
 
     //------------------------------------------------------------
 
+    protected Predicate<E> testPredicate =
+            new Predicate<E>() {
+                public boolean evaluate(final E o) {
+                    return o instanceof String;
+                }
+            };
+
     public Queue<E> makeTestQueue() {
         return decorateCollection(new LinkedList<E>(), testPredicate);
     }

src/test/java/org/apache/commons/collections4/queue/TransformedQueueTest.java

@@ -31,7 +31,7 @@ import org.apache.commons.collections4.collection.TransformedCollectionTest;
  * @since 4.0
  * @version $Id$
  */
-public class TransformedQueueTest<E> extends AbstractCollectionTest<E> {
+public class TransformedQueueTest<E> extends AbstractQueueTest<E> {
     
     public TransformedQueueTest(final String testName) {
         super(testName);

src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java

@@ -30,7 +30,7 @@ import org.apache.commons.collections4.collection.AbstractCollectionTest;
  * @since 4.0
  * @version $Id$
  */
-public class UnmodifiableQueueTest<E> extends AbstractCollectionTest<E> {
+public class UnmodifiableQueueTest<E> extends AbstractQueueTest<E> {
 
     public UnmodifiableQueueTest(final String testName) {
         super(testName);
@@ -38,12 +38,12 @@ public class UnmodifiableQueueTest<E> extends AbstractCollectionTest<E> {
 
     //-----------------------------------------------------------------------
     @Override
-    public Collection<E> makeObject() {
+    public Queue<E> makeObject() {
         return UnmodifiableQueue.unmodifiableQueue(new LinkedList<E>());
     }
 
     @Override
-    public Collection<E> makeFullCollection() {
+    public Queue<E> makeFullCollection() {
         final Queue<E> queue = new LinkedList<E>();
         queue.addAll(Arrays.asList(getFullElements()));
         return UnmodifiableQueue.unmodifiableQueue(queue);