test/jdk/java/lang/StringBuffer/AppendCharSequence.java

rev 53655 : imported patch 8218228-The-constructor-StringBuffer-CharSequence-violates-spec-for-negatively-sized-argument

*** 1,7 ****
  /*
!  * Copyright (c) 2003, 2004, 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) 2003, 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.
*** 20,30 ****
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  /* @test
!  * @bug 4812591 4705328 5019111
   * @summary Test append and insert methods with CharSequence params
   * @key randomness
   */
  
  import java.util.Random;
--- 20,30 ----
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  /* @test
!  * @bug 4812591 4705328 5019111 8218228
   * @summary Test append and insert methods with CharSequence params
   * @key randomness
   */
  
  import java.util.Random;
*** 228,235 ****
--- 228,264 ----
              StringBuffer sb2 = new StringBuffer(cs);
              if (!sb.toString().equals(sb2.toString())) {
                  throw new RuntimeException("CharSequence constructor failure");
              }
          }
+         checkNegativeLenCharSeq(-1);
+         checkNegativeLenCharSeq(-16);
+         checkNegativeLenCharSeq(-17);
+         checkNegativeLenCharSeq(Integer.MIN_VALUE);
      }
  
+     // Test constructing from CharSequence of negative length
+     private static void checkNegativeLenCharSeq(int len) {
+         try {
+             CharSequence seq = new MyNegativeLenCharSeq(len);
+             StringBuffer sb = new StringBuffer(seq);
+         } catch (NegativeArraySizeException expected) {
+         } catch (Throwable exc) {
+             throw new RuntimeException("Unexpected: " + exc, exc);
+         }
+     }
+ 
+     private static class MyNegativeLenCharSeq implements CharSequence {
+         int length;
+         MyNegativeLenCharSeq(int length) {
+             this.length = length;
+         }
+         public char charAt(int i) {
+             throw new UnsupportedOperationException();
+         }
+         public int length() { return length; }
+         public CharSequence subSequence(int st, int e) {
+             throw new UnsupportedOperationException();
+         }
+         public String toString() { return ""; }
+     }
  }