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// 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.Math;
import gnu.testlet.Testlet;
import gnu.testlet.TestHarness;
/**
* Test for a static method Math.cbrt()
*/
public class cbrt implements Testlet
{
/**
* These values are used as arguments to cbrt.
*/
private static double[] inputValues =
{
0.0,
Double.NaN,
Double.POSITIVE_INFINITY,
Double.NEGATIVE_INFINITY,
123456789e-9,
-123456789e-6,
123456789e+2,
-123456789e+4,
987654321e-7,
-987654321e-4,
987654321e+3,
-987654321e+5,
1234509876e-320, // subnormal number
9756272385e-325, // subnormal number
Math.PI,
Math.E
};
/**
* These values are the expected results, obtained from the RI.
*/
private static double[] outputValues =
{
0.0,
Double.NaN,
Double.POSITIVE_INFINITY,
Double.NEGATIVE_INFINITY,
0.49793385921817446,
-4.979338592181745,
2311.204240824796,
-10727.659796410873,
4.622408495690158,
-46.224084956901585,
9958.677214612972,
-46224.08495690158,
2.3111680380625372e-104,
9.918088333941088e-106,
1.4645918875615231,
1.3956124250860895
};
/**
* Test if input NaN is returned unchanged.
*/
private static long[] NaNValues =
{
0x7fff800000000000L,
0xffff800000000000L,
0x7fff812345abcdefL,
0xffff812345abcdefL,
0x7fff000000000001L,
0xffff000000000001L,
0x7fff7654321fedcbL,
0xffff7654321fedcbL
};
/**
* Test not NaN values.
*/
private void testInputValues(TestHarness harness)
{
double res;
for (int i = 0; i < inputValues.length; ++i)
{
res = Math.cbrt(inputValues[i]);
// exact equality
harness.check(Double.doubleToLongBits(res), Double.doubleToLongBits(outputValues[i]));
}
}
/**
* Test if input NaN is returned unchanged.
*/
private void testNaN(TestHarness harness)
{
long bitsNaN;
double valNaN;
for (int i = 0; i < NaNValues.length; ++i)
{
bitsNaN = NaNValues[i];
valNaN = Double.longBitsToDouble(bitsNaN);
// exact equality
harness.check(Double.doubleToRawLongBits(Math.cbrt(valNaN)),
bitsNaN);
}
}
/**
* Entry point to a test.
*/
public void test(TestHarness harness)
{
testInputValues(harness);
testNaN(harness);
}
/**
* 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 = Math.cbrt(inputValues[i]);
System.out.println(Double.toString(res));
}
}
}
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