BATCH-220: Committed the read part of chunking, without adding it to the StepExecutor. It should be noted that I used 'Chunker' instead of 'ChunkReader', since there's already precedence in the java world, and it isn't reading chunk so much as making a chunk out of items. I have also added skipCount to StepExecution, since it's reasonable that this type of data A) should be persisted and B) the domain object is the most logical place for this type of state.

spring-batch-core/src/test/java/org/springframework/batch/core/domain/ChunkTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2006-2008 the original author or authors.
+ *
+ * Licensed 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.springframework.batch.core.domain;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import junit.framework.TestCase;
+
+/**
+ * @author Lucas Ward
+ *
+ */
+public class ChunkTests extends TestCase {
+
+	List items;
+	Chunk chunk;
+	
+	protected void setUp() throws Exception {
+		super.setUp();
+		
+		items = new ArrayList();
+		items.add("1");
+		items.add("2");
+	}
+	
+	
+	public void testCreateChunk(){
+		
+		chunk = new Chunk(new Long(1), items);
+		assertEquals(items, chunk.getItems());
+	}
+	
+	public void testImmutability(){
+		
+		chunk = new Chunk(new Long(1), items);
+		List testItems = chunk.getItems();	
+		testItems.add("3");
+		assertEquals(2, chunk.getItems().size());
+	}
+}