test/java/lang/StringBuffer/ToStringCache.java

*** 20,30 ****
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  /* @test
!  * @bug 8013395
   * @summary Test StringBuffer.toString caching
   */
  
  public class ToStringCache {
  
--- 20,30 ----
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  /* @test
!  * @bug 8013395 8014814
   * @summary Test StringBuffer.toString caching
   */
  
  public class ToStringCache {
  
*** 197,206 ****
--- 197,228 ----
  
          sb.reverse();
          b = sb.toString();
          checkUnequal(a, b);
  
+         // Extra checks that append(null) works correctly
+ 
+         sb.append((String)null);
+         b = sb.toString();
+         checkUnequal(a, b);
+         a = b;
+ 
+         sb.append((StringBuffer)null);
+         b = sb.toString();
+         checkUnequal(a, b);
+         a = b;
+ 
+         sb.append((StringBuilder)null);
+         b = sb.toString();
+         checkUnequal(a, b);
+         a = b;
+ 
+         sb.append((CharSequence)null);
+         b = sb.toString();
+         checkUnequal(a, b);
+         a = b;
+ 
          // non-mutating methods
  
          // Reset to known value
          sb = new StringBuffer(original);
          a = sb.toString();