make IntList cloneable

primitiveCollections/src/main/java/org/lucares/collections/IntList.java

@@ -10,10 +10,8 @@ import java.util.List;
  * This class does not (yet) implements all methods a java.util {@link List}
  * would have.
  */
-public class IntList implements Serializable {
+public class IntList implements Serializable, Cloneable {
 
-	// TODO make Serializable
-	// TODO make Cloneable
 	// TODO support Iterator
 	// TODO add mod counts
 	// TODO support sublists
@@ -28,7 +26,7 @@ public class IntList implements Serializable {
 	// TODO add toArray(int[] a)
 	// TODO remove bounds checks that are handled by java, e.g. negative indices
 
-	private static final long serialVersionUID = 2588449582065895141L;
+	private static final long serialVersionUID = -6823520157007564746L;
 
 	private static final int DEFAULT_CAPACITY = 10;
 
@@ -399,4 +397,15 @@ public class IntList implements Serializable {
 			data = local_data;
 		}
 	}
+
+	@Override
+	public IntList clone() {
+		try {
+			final IntList result = (IntList) super.clone();
+			result.data = Arrays.copyOf(data, index);
+			return result;
+		} catch (final CloneNotSupportedException e) {
+			throw new IllegalStateException(e);
+		}
+	}
 }

primitiveCollections/src/test/java/org/lucares/collections/IntListTest.java

@@ -455,4 +455,17 @@ public class IntListTest {
 					list.size(), actual.getCapacity());
 		}
 	}
+
+	@Test
+	public void testClone() {
+		final IntList list = new IntList();
+		list.addAll(1, 2);
+
+		final IntList clone = list.clone();
+
+		Assert.assertEquals(list, clone);
+
+		list.set(1, 0);
+		Assert.assertNotEquals(list, clone);
+	}
 }