--- jsr166/src/test/tck/ArrayListTest.java	2016/10/17 17:52:30	1.1
+++ jsr166/src/test/tck/ArrayListTest.java	2017/08/04 03:43:44	1.6
@@ -6,10 +6,10 @@
  */
 
 import java.util.ArrayList;
-import java.util.Collection;
+import java.util.Arrays;
+import java.util.List;
 
 import junit.framework.Test;
-import junit.framework.TestSuite;
 
 public class ArrayListTest extends JSR166TestCase {
     public static void main(String[] args) {
@@ -19,13 +19,43 @@ public class ArrayListTest extends JSR16
     public static Test suite() {
         class Implementation implements CollectionImplementation {
             public Class<?> klazz() { return ArrayList.class; }
-            public Collection emptyCollection() { return new ArrayList(); }
+            public List emptyCollection() { return new ArrayList(); }
             public Object makeElement(int i) { return i; }
             public boolean isConcurrent() { return false; }
             public boolean permitsNulls() { return true; }
         }
-        return newTestSuite(// ArrayListTest.class,
-                            CollectionTest.testSuite(new Implementation()));
+        class SubListImplementation extends Implementation {
+            public List emptyCollection() {
+                return super.emptyCollection().subList(0, 0);
+            }
+        }
+        return newTestSuite(
+                // ArrayListTest.class,
+                CollectionTest.testSuite(new Implementation()),
+                CollectionTest.testSuite(new SubListImplementation()));
+    }
+
+    /**
+     * A cloned list equals original
+     */
+    public void testClone() throws Exception {
+        ArrayList<Integer> x = new ArrayList<>();
+        x.add(1);
+        x.add(2);
+        x.add(3);
+        ArrayList<Integer> y = (ArrayList<Integer>) x.clone();
+
+        assertNotSame(y, x);
+        assertEquals(x, y);
+        assertEquals(y, x);
+        assertEquals(x.size(), y.size());
+        assertEquals(x.toString(), y.toString());
+        assertTrue(Arrays.equals(x.toArray(), y.toArray()));
+        while (!x.isEmpty()) {
+            assertFalse(y.isEmpty());
+            assertEquals(x.remove(0), y.remove(0));
+        }
+        assertTrue(y.isEmpty());
     }
 
 }