test/jdk/java/math/BigInteger/BigIntegerTest.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 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.

@@ -24,11 +24,11 @@
 /*
  * @test
  * @library /test/lib
  * @build jdk.test.lib.RandomFactory
  * @run main BigIntegerTest
- * @bug 4181191 4161971 4227146 4194389 4823171 4624738 4812225 4837946 4026465 8074460 8078672 8032027
+ * @bug 4181191 4161971 4227146 4194389 4823171 4624738 4812225 4837946 4026465 8074460 8078672 8032027 8229845
  * @summary tests methods in BigInteger (use -Dseed=X to set PRNG seed)
  * @run main/timeout=400 BigIntegerTest
  * @author madbot
  * @key randomness
  */

@@ -793,11 +793,11 @@
     public static void stringConv() {
         int failCount = 0;
 
         // Generic string conversion.
         for (int i=0; i<100; i++) {
-            byte xBytes[] = new byte[Math.abs(random.nextInt())%100+1];
+            byte xBytes[] = new byte[Math.abs(random.nextInt())%200+1];
             random.nextBytes(xBytes);
             BigInteger x = new BigInteger(xBytes);
 
             for (int radix=Character.MIN_RADIX; radix < Character.MAX_RADIX; radix++) {
                 String result = x.toString(radix);

@@ -834,10 +834,20 @@
                     }
                 }
             }
         }
 
+        // Check value with many trailing zeros.
+        String val = "123456789" + "0".repeat(200);
+        BigInteger b = new BigInteger(val);
+        String s = b.toString();
+        if (!val.equals(s)) {
+            System.err.format("Expected length %d but got %d%n",
+                val.length(), s.length());
+            failCount++;
+        }
+
         report("String Conversion", failCount);
     }
 
     public static void byteArrayConv(int order) {
         int failCount = 0;