1 /*
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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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13  * accompanied this code).
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23 package test.java.lang.Math;
24 
25 import org.testng.annotations.Test;
26 import org.testng.Assert;
27 
28 /* @test
29    @bug 4096278
30    @summary Math.abs(+0.0) wrong
31    @author Anand Palaniswamy
32  */
33 public class AbsPositiveZero {
34 
isPositiveZero(float f)35     private static boolean isPositiveZero(float f) {
36         return Float.floatToIntBits(f) == Float.floatToIntBits(0.0f);
37     }
38 
isPositiveZero(double d)39     private static boolean isPositiveZero(double d) {
40         return Double.doubleToLongBits(d) == Double.doubleToLongBits(0.0d);
41     }
42 
43     @Test
testAbsPositiveZero()44     public void testAbsPositiveZero() throws Exception {
45         Assert.assertTrue(isPositiveZero(Math.abs(-0.0d)));
46         Assert.assertTrue(isPositiveZero(Math.abs(+0.0d)));
47 
48         Assert.assertEquals(Math.abs(Double.POSITIVE_INFINITY), Double.POSITIVE_INFINITY);
49         Assert.assertEquals(Math.abs(Double.NEGATIVE_INFINITY), Double.POSITIVE_INFINITY);
50 
51         double dnanval = Math.abs(Double.NaN);
52         Assert.assertFalse(dnanval == dnanval);
53 
54         Assert.assertTrue(isPositiveZero(Math.abs(-0.0f)));
55         Assert.assertTrue(isPositiveZero(Math.abs(+0.0f)));
56 
57         Assert.assertEquals(Math.abs(Float.POSITIVE_INFINITY), Float.POSITIVE_INFINITY);
58         Assert.assertEquals(Math.abs(Float.NEGATIVE_INFINITY), Float.POSITIVE_INFINITY);
59 
60         float fnanval = Math.abs(Float.NaN);
61         Assert.assertFalse(fnanval == fnanval);
62     }
63 }
64