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Fix up double nextAfter special cases; add float test 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_X@1061603 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Sebastian Bazley 2011-01-21 02:46:14 +00:00
parent 1f34194a4e
commit 07743b18ea
1 changed files with 22 additions and 10 deletions
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32
src/test/java/org/apache/commons/math/util/MathUtilsTest.java
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@ -1020,16 +1020,28 @@ public final class MathUtilsTest extends TestCase {
}
public void testNextAfterSpecialCases() {
assertTrue(Double.isInfinite(FastMath.nextAfter(Double.NEGATIVE_INFINITY, 0)));
assertTrue(Double.isInfinite(FastMath.nextAfter(Double.POSITIVE_INFINITY, 0)));
assertTrue(Double.isNaN(FastMath.nextAfter(Double.NaN, 0)));
assertTrue(Double.isInfinite(FastMath.nextAfter(Double.MAX_VALUE, Double.POSITIVE_INFINITY)));
assertTrue(Double.isInfinite(FastMath.nextAfter(-Double.MAX_VALUE, Double.NEGATIVE_INFINITY)));
assertEquals(Double.MIN_VALUE, FastMath.nextAfter(0, 1), 0);
assertEquals(-Double.MIN_VALUE, FastMath.nextAfter(0, -1), 0);
assertEquals(0, FastMath.nextAfter(Double.MIN_VALUE, -1), 0);
assertEquals(0, FastMath.nextAfter(-Double.MIN_VALUE, 1), 0);
public void testDoubleNextAfterSpecialCases() {
assertEquals(-Double.MAX_VALUE,FastMath.nextAfter(Double.NEGATIVE_INFINITY, 0D));
assertEquals(Double.MAX_VALUE,FastMath.nextAfter(Double.POSITIVE_INFINITY, 0D));
assertEquals(Double.NaN,FastMath.nextAfter(Double.NaN, 0D));
assertEquals(Double.POSITIVE_INFINITY,FastMath.nextAfter(Double.MAX_VALUE, Double.POSITIVE_INFINITY));
assertEquals(Double.NEGATIVE_INFINITY,FastMath.nextAfter(-Double.MAX_VALUE, Double.NEGATIVE_INFINITY));
assertEquals(Double.MIN_VALUE, FastMath.nextAfter(0D, 1D), 0D);
assertEquals(-Double.MIN_VALUE, FastMath.nextAfter(0D, -1D), 0D);
assertEquals(0D, FastMath.nextAfter(Double.MIN_VALUE, -1), 0D);
assertEquals(0D, FastMath.nextAfter(-Double.MIN_VALUE, 1), 0D);
}
public void testFloatNextAfterSpecialCases() {
assertEquals(-Float.MAX_VALUE,FastMath.nextAfter(Float.NEGATIVE_INFINITY, 0F));
assertEquals(Float.MAX_VALUE,FastMath.nextAfter(Float.POSITIVE_INFINITY, 0F));
assertEquals(Float.NaN,FastMath.nextAfter(Float.NaN, 0F));
assertEquals(Float.POSITIVE_INFINITY,FastMath.nextAfter(Float.MAX_VALUE, Float.POSITIVE_INFINITY));
assertEquals(Float.NEGATIVE_INFINITY,FastMath.nextAfter(-Float.MAX_VALUE, Float.NEGATIVE_INFINITY));
assertEquals(Float.MIN_VALUE, FastMath.nextAfter(0F, 1F), 0F);
assertEquals(-Float.MIN_VALUE, FastMath.nextAfter(0F, -1F), 0F);
assertEquals(0F, FastMath.nextAfter(Float.MIN_VALUE, -1F), 0F);
assertEquals(0F, FastMath.nextAfter(-Float.MIN_VALUE, 1F), 0F);
}
public void testScalb() {