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Patch: FYI: modPow test

I'm checking this in.

This tests for a BigInteger.modPow bug.


2006-05-26  Tom Tromey  <>

	* gnu/testlet/java/math/BigInteger/ New file.

Index: gnu/testlet/java/math/BigInteger/
RCS file: gnu/testlet/java/math/BigInteger/
diff -N gnu/testlet/java/math/BigInteger/
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gnu/testlet/java/math/BigInteger/	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,45 @@
+/* -- tests for modPow
+   Copyright (C) 2006 Red Hat, Inc.
+This file is part of Mauve.
+Mauve is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+Mauve is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+General Public License for more details.
+You should have received a copy of the GNU General Public License
+along with Mauve; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+// Tags: JDK1.1
+import java.math.BigInteger;
+import gnu.testlet.TestHarness;
+import gnu.testlet.Testlet;
+public class modPow implements Testlet {
+	public void test(TestHarness harness) {
+		BigInteger ten = BigInteger.valueOf(10);
+		BigInteger three = BigInteger.valueOf(3);
+		BigInteger five = BigInteger.valueOf(5);
+		BigInteger minusFive = five.negate();
+		BigInteger seven = BigInteger.valueOf(7);
+		harness.check(three.modPow(five, ten), three);
+		harness.check(three.modPow(minusFive, ten), seven);
+		harness.check(three.modPow(three.negate(), ten), three);
+	}

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