--- jsr166/src/test/tck/Collection8Test.java	2018/03/26 21:06:51	1.49
+++ jsr166/src/test/tck/Collection8Test.java	2018/04/04 03:35:13	1.50
@@ -906,6 +906,26 @@ public class Collection8Test extends JSR
         }
     }
 
+    public void testObjectMethods() {
+        ThreadLocalRandom rnd = ThreadLocalRandom.current();
+        Collection c = impl.emptyCollection();
+        for (int n = rnd.nextInt(3); n--> 0; )
+            c.add(impl.makeElement(rnd.nextInt()));
+        assertEquals(c, c);
+        if (c instanceof List) {
+            List copy = new ArrayList(c);
+            assertEquals(copy, c);
+            assertEquals(c, copy);
+            assertEquals(copy.hashCode(), c.hashCode());
+        }
+        if (c instanceof Set) {
+            Set copy = new HashSet(c);
+            assertEquals(copy, c);
+            assertEquals(c, copy);
+            assertEquals(copy.hashCode(), c.hashCode());
+        }
+    }
+
 //     public void testCollection8DebugFail() {
 //         fail(impl.klazz().getSimpleName());
 //     }