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Posted to dev@commons.apache.org by ps...@apache.org on 2004/06/27 00:42:37 UTC
cvs commit: jakarta-commons/math/src/test/org/apache/commons/math/stat/univariate/moment StandardDeviationTest.java
psteitz 2004/06/26 15:42:37
Modified: math/src/test/org/apache/commons/math/stat/univariate/moment
StandardDeviationTest.java
Log:
Added test to ensure NaN is returned for n=0, and 0 for n=1.
Revision Changes Path
1.12 +12 -1 jakarta-commons/math/src/test/org/apache/commons/math/stat/univariate/moment/StandardDeviationTest.java
Index: StandardDeviationTest.java
===================================================================
RCS file: /home/cvs/jakarta-commons/math/src/test/org/apache/commons/math/stat/univariate/moment/StandardDeviationTest.java,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -r1.11 -r1.12
--- StandardDeviationTest.java 17 Jun 2004 21:37:05 -0000 1.11
+++ StandardDeviationTest.java 26 Jun 2004 22:42:37 -0000 1.12
@@ -56,5 +56,16 @@
public double expectedValue() {
return this.std;
}
+
+ /**
+ * Make sure Double.NaN is returned iff n = 0
+ *
+ */
+ public void testNaN() {
+ StandardDeviation std = new StandardDeviation();
+ assertTrue(Double.isNaN(std.getResult()));
+ std.increment(1d);
+ assertEquals(0d, std.getResult(), 0);
+ }
}
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