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From er...@apache.org
Subject svn commit: r1371170 - /commons/proper/math/trunk/src/test/java/org/apache/commons/math3/util/FastMathTest.java
Date Thu, 09 Aug 2012 11:40:01 GMT
Author: erans
Date: Thu Aug  9 11:40:01 2012
New Revision: 1371170

URL: http://svn.apache.org/viewvc?rev=1371170&view=rev
Log:
Unit test for "FastMath.pow(double,int)".

Modified:
    commons/proper/math/trunk/src/test/java/org/apache/commons/math3/util/FastMathTest.java

Modified: commons/proper/math/trunk/src/test/java/org/apache/commons/math3/util/FastMathTest.java
URL: http://svn.apache.org/viewvc/commons/proper/math/trunk/src/test/java/org/apache/commons/math3/util/FastMathTest.java?rev=1371170&r1=1371169&r2=1371170&view=diff
==============================================================================
--- commons/proper/math/trunk/src/test/java/org/apache/commons/math3/util/FastMathTest.java
(original)
+++ commons/proper/math/trunk/src/test/java/org/apache/commons/math3/util/FastMathTest.java
Thu Aug  9 11:40:01 2012
@@ -1105,4 +1105,18 @@ public class FastMathTest {
         Assert.assertEquals(1.0F, FastMath.copySign(1d, 0.0F), delta);
         Assert.assertEquals(-1.0F, FastMath.copySign(1d, -2.0F), delta);
     }
+
+    @Test
+    public void testIntPow() {
+        final double base = 1.23456789;
+        final int maxExp = 300;
+
+        for (int i = 0; i < maxExp; i++) {
+            final double expected = FastMath.pow(base, (double) i);
+            Assert.assertEquals("exp=" + i,
+                                expected,
+                                FastMath.pow(base, i),
+                                60 * Math.ulp(expected));
+        }
+    }
 }



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