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// Tags: JDK1.3
// Copyright (C) 2012 Pavel Tisnovsky <ptisnovs@redhat.com>
// 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.strictfp_modifier;
import gnu.testlet.Testlet;
import gnu.testlet.TestHarness;
/**
* Test for a static method Math.atan()
* by using strictfp modifier.
*/
public strictfp class atan implements Testlet
{
/**
* Function (=static method) checked by this test.
*/
private static double testedFunction(double input)
{
return Math.atan(input);
}
/**
* These values are used as arguments to compute atan using Math.
*/
private static double[] inputValues =
{
Double.NaN,
Double.POSITIVE_INFINITY,
Double.NEGATIVE_INFINITY,
Double.MAX_VALUE,
Double.MIN_VALUE,
0.0,
0.2,
0.4,
0.5,
0.6,
0.8,
1.0,
2.0,
1e10,
1e-10,
-0.0,
-0.2,
-0.4,
-0.5,
-0.6,
-0.8,
-1.0,
-2.0,
-1e10,
-1e-10,
};
/**
* These values are the expected results, obtained from the RI.
*/
private static double[] outputValues =
{
// output value input value
Double.NaN, // NaN
Math.PI/2.0, // Infinity
-Math.PI/2.0, // -Infinity
1.5707963267948966, // 1.7976931348623157E308
4.9E-324, // 4.9E-324
0.0, // 0.0
0.19739555984988078, // 0.2
0.3805063771123649, // 0.4
0.4636476090008061, // 0.5
0.5404195002705842, // 0.6
0.6747409422235527, // 0.8
0.7853981633974483, // 1.0
1.1071487177940904, // 2.0
1.5707963266948965, // 1.0E10
1.0E-10, // 1.0E-10
-0.0, // -0.0
-0.19739555984988078,// -0.2
-0.3805063771123649, // -0.4
-0.4636476090008061, // -0.5
-0.5404195002705842, // -0.6
-0.6747409422235527, // -0.8
-0.7853981633974483, // -1.0
-1.1071487177940904, // -2.0
-1.5707963266948965, // -1.0E10
-1.0E-10, // -1.0E-10
};
/**
* These values represent various NaN
*/
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 = testedFunction(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(testedFunction(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)
{
for (int i = 0; i < inputValues.length; ++i)
{
double input = inputValues[i];
double output = testedFunction(inputValues[i]);
System.out.println(" " + Double.toString(output) + ", // " + input);
}
}
}
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