FYI: java.lang.StrictMath.expm1 new test

[Carsten Neumann <cn-develop at gmx dot net>]

	Hi,

this (commited) patch adds a new test for expm1(double)

	Cheers,
		Carsten

2006-07-22  Carsten Neumann  <cn-develop@gmx.net>

	* gnu/testlet/java/lang/StrictMath/expm1.java: New test.

Index: expm1.java
===================================================================
RCS file: expm1.java
diff -N expm1.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ expm1.java	22 Jul 2006 14:32:30 -0000	1.1
@@ -0,0 +1,120 @@
+// Tags: JDK1.5
+
+//  Copyright (C) 2006 Carsten Neumann <cn-develop@gmx.net>
+
+//  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
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU 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, 59 Temple Place - Suite 330,
+//  Boston, MA 02111-1307, USA.
+
+package gnu.testlet.java.lang.StrictMath;
+
+import gnu.testlet.Testlet;
+import gnu.testlet.TestHarness;
+
+public class expm1 implements Testlet
+{
+  /**
+   * These values are used as arguments to cbrt.
+   * The values are somewhat arbitrary, but ensure that all code paths
+   * are tested.
+   */
+  private static double[] inputValues =
+    {
+      0.0,
+      Double.NaN,
+      Double.POSITIVE_INFINITY,
+      Double.NEGATIVE_INFINITY,
+      0.0000000000000000277555756156289135105,   // ~ 2^-55
+      -0.0000000000000000277555756156289135105,  // ~ -2^55
+      0.6 * 0.6931471805599453 + 0.05,           // 0.6 * ln(2) + 0.05
+      -0.6 * 0.6931471805599453 - 0.05,          // -0.6 * ln(2) - 0.05
+      0.25 * 0.6931471805599453 + 0.03,          // 0.25 * ln(2) + 0.03
+      -0.25 * 0.6931471805599453 - 0.03,         // -0.25 * ln(2) - 0.03
+      0.44,
+      -0.44,
+      2.3 * 0.6931471805599453 + 0.05,           // 2.3 * ln(2) + 0.05
+      -2.3 * 0.6931471805599453 - 0.05,          // -2.3 * ln(2) - 0.05
+      7 * 0.6931471805599453 + 0.03,             // 7 * ln(2) + 0.03
+      -9 * 0.6931471805599453 - 0.03,            // -9 * ln(2) - 0.03
+      29 * 0.6931471805599453 + 0.03,            // 29 * ln(2) + 0.03
+      -27 * 0.6931471805599453 - 0.03,           // -27 * ln(2) - 0.03
+      709.782712893384,                          //  EXP_LIMIT_H
+      709.782712893384 + 3.423e-5,               //  EXP_LIMIT_H + 3.423e-5
+      709.782712893384 - 3.423e-5,               //  EXP_LIMIT_H - 3.423e-5
+      -709.782712893384,                         // -EXP_LIMIT_H
+      -709.782712893384 - 3.423e-5,              // -EXP_LIMIT_H - 3.423e-5
+      -709.782712893384 + 3.423e-5               // -EXP_LIMIT_H + 3.423e-5
+    };
+
+  /**
+   * These values are the expected results, obtained from the RI.
+   */
+  private static double[] outputValues =
+    {
+      0.0,
+      Double.NaN,
+      Double.POSITIVE_INFINITY,
+      -1.0,
+      2.7755575615628914E-17,
+      -2.7755575615628914E-17,
+      0.5934290166706889,
+      -0.3724226247056801,
+      0.22542386346433524,
+      -0.1839558296400811,
+      0.5527072185113361,
+      -0.35596357891685865,
+      4.177066148857307,
+      -0.806840405116183,
+      130.89818034605017,
+      -0.9981045985672881,
+      5.532210644181606E8,
+      -0.9999999927696174,
+      1.7976931348622732E308,
+      Double.POSITIVE_INFINITY,
+      1.7976316008794578E308,
+      -1.0,
+      -1.0,
+      -1.0
+    };
+
+  public void test(TestHarness harness)
+  {
+    double res;
+
+    for (int i = 0; i < inputValues.length; ++i)
+      {
+	res = StrictMath.expm1(inputValues[i]);
+
+	// exact equality seems appropriate for StrictMath
+	harness.check(res, outputValues[i]);
+      }
+  }
+
+  /**
+   * Run this on the RI to obtain the expected output values.
+   */
+  public static void main(String[] argv)
+  {
+    double res;
+
+    for (int i = 0; i < inputValues.length; ++i)
+      {
+	res = StrictMath.expm1(inputValues[i]);
+
+	System.out.println(Double.toString(res));
+      }
+  }
+}