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Added tests for getSummary() added to SummaryStatistics. 

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/math/trunk@141230 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Phil Steitz 2004-05-18 04:21:28 +00:00
parent 1ed7683a75
commit da64b62f7e
1 changed files with 30 additions and 7 deletions
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37
src/test/org/apache/commons/math/stat/univariate/UnivariateImplTest.java
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@ -20,10 +20,11 @@ import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.apache.commons.math.TestUtils;
/**
* Test cases for the {@link DescriptiveStatistics} class.
*
* @version $Revision: 1.4 $ $Date: 2004/04/12 02:27:50 $
* @version $Revision: 1.5 $ $Date: 2004/05/18 04:21:28 $
*/
public final class UnivariateImplTest extends TestCase {
@ -41,11 +42,14 @@ public final class UnivariateImplTest extends TestCase {
private double max = 3;
private double tolerance = 10E-15;
protected SummaryStatistics u = null;
public UnivariateImplTest(String name) {
super(name);
}
public void setUp() {
u = SummaryStatistics.newInstance();
}
public static Test suite() {
@ -56,7 +60,6 @@ public final class UnivariateImplTest extends TestCase {
/** test stats */
public void testStats() {
SummaryStatistics u = SummaryStatistics.newInstance();
assertEquals("total count",0,u.getN(),tolerance);
u.addValue(one);
u.addValue(twoF);
@ -75,7 +78,6 @@ public final class UnivariateImplTest extends TestCase {
}
public void testN0andN1Conditions() throws Exception {
SummaryStatistics u = SummaryStatistics.newInstance();
assertTrue("Mean of n = 0 set should be NaN",
Double.isNaN( u.getMean() ) );
assertTrue("Standard Deviation of n = 0 set should be NaN",
@ -103,9 +105,7 @@ public final class UnivariateImplTest extends TestCase {
}
public void testProductAndGeometricMean() throws Exception {
SummaryStatistics u = SummaryStatistics.newInstance();
public void testProductAndGeometricMean() throws Exception {
u.addValue( 1.0 );
u.addValue( 2.0 );
u.addValue( 3.0 );
@ -116,7 +116,6 @@ public final class UnivariateImplTest extends TestCase {
}
public void testNaNContracts() {
SummaryStatistics u = SummaryStatistics.newInstance();
double nan = Double.NaN;
assertTrue("mean not NaN",Double.isNaN(u.getMean()));
assertTrue("min not NaN",Double.isNaN(u.getMin()));
@ -143,4 +142,28 @@ public final class UnivariateImplTest extends TestCase {
//FiXME: test all other NaN contract specs
}
public void testGetSummary() {
StatisticalSummary summary = u.getSummary();
verifySummary(summary);
u.addValue(1d);
summary = u.getSummary();
verifySummary(summary);
u.addValue(2d);
summary = u.getSummary();
verifySummary(summary);
u.addValue(2d);
summary = u.getSummary();
verifySummary(summary);
}
private void verifySummary(StatisticalSummary s) {
assertEquals("N",s.getN(),u.getN());
TestUtils.assertEquals("sum",s.getSum(),u.getSum(),tolerance);
TestUtils.assertEquals("var",s.getVariance(),u.getVariance(),tolerance);
TestUtils.assertEquals("std",s.getStandardDeviation(),u.getStandardDeviation(),tolerance);
TestUtils.assertEquals("mean",s.getMean(),u.getMean(),tolerance);
TestUtils.assertEquals("min",s.getMin(),u.getMin(),tolerance);
TestUtils.assertEquals("max",s.getMax(),u.getMax(),tolerance);
}
}