test/jdk/java/util/Collections/NCopies.java

*** 1,7 ***
  /*
!  * Copyright (c) 2005, 2025, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ---
  /*
!  * Copyright (c) 2005, 2026, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.

*** 24,12 ***
--- 24,14 ---
  /*
   * @test
   * @bug     6267846 6275009
   * @summary Test Collections.nCopies
   * @author  Martin Buchholz
+  * @library /test/lib
   */
  
+ import jdk.test.lib.valueclass.VClass;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.AbstractList;
  import java.util.List;
  import java.util.Objects;

*** 140,10 ***
--- 142,19 ---
          check(copies.equals(copies.reversed()));
          List<String> empty = Collections.nCopies(0, "content");
          check(empty.equals(empty.reversed()));
      }
  
+     private static void checkValueCopies() {
+         List<VClass> copies = Collections.nCopies(10, new VClass(7, new int[] { 7 }));
+         check(copies.indexOf(new VClass(7, new int[] { 7 })) == 0);
+         check(copies.lastIndexOf(new VClass(7, new int[] { 7 })) == 9);
+         check(copies.equals(referenceNCopies(10, new VClass(7, new int[] { 7 }))));
+         check(copies.hashCode() == referenceNCopies(10, new VClass(7, new int[] { 7 })).hashCode());
+         check(copies.equals(copies.reversed()));
+     }
+ 
      public static void main(String[] args) {
          try {
              List<String> empty = Collections.nCopies(0, "foo");
              checkEmpty(empty);
              checkEmpty(empty.subList(0,0));

*** 156,10 ***
--- 167,12 ---
  
              checkEquals();
  
              checkReversed();
  
+             checkValueCopies();
+ 
          } catch (Throwable t) { unexpected(t); }
  
          System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
          if (failed > 0) throw new Error("Some tests failed");
      }