--- jsr166/src/test/tck/LinkedListTest.java	2016/10/17 00:56:11	1.42
+++ jsr166/src/test/tck/LinkedListTest.java	2017/03/11 18:20:47	1.46
@@ -13,7 +13,6 @@ import java.util.LinkedList;
 import java.util.NoSuchElementException;
 
 import junit.framework.Test;
-import junit.framework.TestSuite;
 
 public class LinkedListTest extends JSR166TestCase {
     public static void main(String[] args) {
@@ -28,16 +27,23 @@ public class LinkedListTest extends JSR1
             public boolean isConcurrent() { return false; }
             public boolean permitsNulls() { return true; }
         }
-        return newTestSuite(LinkedListTest.class,
-                            CollectionTest.testSuite(new Implementation()));
+        class SubListImplementation extends Implementation {
+            public Collection emptyCollection() {
+                return new LinkedList().subList(0, 0);
+            }
+        }
+        return newTestSuite(
+                LinkedListTest.class,
+                CollectionTest.testSuite(new Implementation()),
+                CollectionTest.testSuite(new SubListImplementation()));
     }
 
     /**
      * Returns a new queue of given size containing consecutive
      * Integers 0 ... n - 1.
      */
-    private LinkedList<Integer> populatedQueue(int n) {
-        LinkedList<Integer> q = new LinkedList<Integer>();
+    private static LinkedList<Integer> populatedQueue(int n) {
+        LinkedList<Integer> q = new LinkedList<>();
         assertTrue(q.isEmpty());
         for (int i = 0; i < n; ++i)
             assertTrue(q.offer(new Integer(i)));