--- old/test/java/util/stream/bootlib/java.base/java/util/stream/LambdaTestHelpers.java	2016-01-23 18:28:30.423762500 +0600
+++ new/test/java/util/stream/bootlib/java.base/java/util/stream/LambdaTestHelpers.java	2016-01-23 18:28:30.148727600 +0600
@@ -47,6 +47,7 @@
 
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertTrue;
+import static org.testng.Assert.assertFalse;
 
 /**
  * LambdaTestHelpers -- assertion methods and useful objects for lambda test cases
@@ -400,6 +401,20 @@
         assertEquals(toBoxedMultiset(actual), toBoxedMultiset(expected));
     }
 
+    public static<T> void assertContains(Optional<T> actual, Iterator<T> it) {
+        if (actual.isPresent()) {
+            T r = actual.get();
+            boolean contained = false;
+            while (!contained && it.hasNext()) {
+                contained = Objects.equals(r, it.next());
+            }
+            assertTrue(contained);
+        }
+        else {
+            assertFalse(it.hasNext());
+        }
+    }
+
     public static void launderAssertion(Runnable r, Supplier<String> additionalInfo) {
         try {
             r.run();