Increase LogisticsDistribution test coverage.
diff --git a/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticsDistributionTest.java b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticsDistributionTest.java
index 310d8d8..ecf45fc 100644
--- a/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticsDistributionTest.java
+++ b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticsDistributionTest.java
@@ -25,31 +25,6 @@
*/
public class LogisticsDistributionTest extends ContinuousDistributionAbstractTest {
- @Test
- public void testParameters() {
- LogisticDistribution d = makeDistribution();
- Assertions.assertEquals(2, d.getLocation(), Precision.EPSILON);
- Assertions.assertEquals(5, d.getScale(), Precision.EPSILON);
- }
-
- @Test
- public void testSupport() {
- LogisticDistribution d = makeDistribution();
- Assertions.assertTrue(Double.isInfinite(d.getSupportLowerBound()));
- Assertions.assertTrue(Double.isInfinite(d.getSupportUpperBound()));
- Assertions.assertTrue(d.isSupportConnected());
- }
-
- @Test
- public void testMeanAndVariance() {
- LogisticDistribution d = makeDistribution();
- // Constructor 'location' parameter = mean
- Assertions.assertEquals(2.0, d.getMean());
- // Variance = (s^2 * pi^2) / 3
- // Constructor 'scale' parameter = s
- Assertions.assertEquals(5 * 5 * Math.PI * Math.PI / 3, d.getVariance());
- }
-
@Override
public LogisticDistribution makeDistribution() {
return new LogisticDistribution(2, 5);
@@ -77,4 +52,43 @@
0.4501660, 0.5000000, 0.5498340, 0.5986877, 0.6456563
};
}
+
+ //---------------------------- Additional test cases -------------------------
+
+ @Test
+ public void testInverseCumulativeProbabilityExtremes() {
+ setInverseCumulativeTestPoints(new double[] {0, 1});
+ setInverseCumulativeTestValues(new double[] {0, Double.POSITIVE_INFINITY});
+ verifyInverseCumulativeProbabilities();
+ }
+
+ @Test
+ public void testConstructorPrecondition1() {
+ Assertions.assertThrows(IllegalArgumentException.class, () -> new LogisticDistribution(1, 0));
+ }
+
+ @Test
+ public void testParameters() {
+ LogisticDistribution d = makeDistribution();
+ Assertions.assertEquals(2, d.getLocation(), Precision.EPSILON);
+ Assertions.assertEquals(5, d.getScale(), Precision.EPSILON);
+ }
+
+ @Test
+ public void testSupport() {
+ LogisticDistribution d = makeDistribution();
+ Assertions.assertTrue(Double.isInfinite(d.getSupportLowerBound()));
+ Assertions.assertTrue(Double.isInfinite(d.getSupportUpperBound()));
+ Assertions.assertTrue(d.isSupportConnected());
+ }
+
+ @Test
+ public void testMeanAndVariance() {
+ LogisticDistribution d = makeDistribution();
+ // Constructor 'location' parameter = mean
+ Assertions.assertEquals(2.0, d.getMean());
+ // Variance = (s^2 * pi^2) / 3
+ // Constructor 'scale' parameter = s
+ Assertions.assertEquals(5 * 5 * Math.PI * Math.PI / 3, d.getVariance());
+ }
}
