test/jdk/java/lang/StringBuffer/CompactStringBuffer.java

rev 54318 : 8221430: StringBuffer(CharSequence) constructor truncates when -XX:-CompactStrings specified
Reviewed-by: igerasim, rriggs
Contributed-by: Andrew Leonard <andrew_m_leonard@uk.ibm.com>

*** 1,7 ****
  /*
!  * Copyright (c) 2015, 2018, 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) 2015, 2019, 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.
*** 28,38 ****
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertTrue;
  
  /*
   * @test
!  * @bug 8077559
   * @summary Tests Compact String. This test is testing StringBuffer
   *          behavior related to Compact String.
   * @run testng/othervm -XX:+CompactStrings CompactStringBuffer
   * @run testng/othervm -XX:-CompactStrings CompactStringBuffer
   */
--- 28,38 ----
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertTrue;
  
  /*
   * @test
!  * @bug 8077559 8221430
   * @summary Tests Compact String. This test is testing StringBuffer
   *          behavior related to Compact String.
   * @run testng/othervm -XX:+CompactStrings CompactStringBuffer
   * @run testng/othervm -XX:-CompactStrings CompactStringBuffer
   */
*** 438,447 ****
--- 438,453 ----
          ////////////////////////////////////////////////////////////////////
          check(new StringBuffer().append(ascii).append(1.23456).toString(),
                "abcdefgh1.23456");
          check(new StringBuffer().append(bmp).append(1.23456).toString(),
                "\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07\u4e081.23456");
+ 
+         ////////////////////////////////////////////////////////////////////
+         check(new StringBuffer((CharSequence)new StringBuffer(ascii)).toString(),
+               ascii);
+         check(new StringBuffer((CharSequence)new StringBuffer(asciiMixed)).toString(),
+               asciiMixed);
      }
  
      private void checkGetChars(StringBuffer sb, int srcBegin, int srcEnd,
              char expected[]) {
          char[] dst = new char[srcEnd - srcBegin];