This is an automated email from the ASF dual-hosted git repository. aherbert pushed a commit to branch master in repository https://gitbox.apache.org/repos/asf/commons-statistics.git
commit c4544b7f3b91ba96e1dc3a659338506dc4410ee3 Author: aherbert <[email protected]> AuthorDate: Tue Jun 23 12:20:37 2020 +0100 Added test for default methods in ContinuousDistribution --- .../distribution/ContinuousDistributionTest.java | 89 ++++++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/ContinuousDistributionTest.java b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/ContinuousDistributionTest.java new file mode 100644 index 0000000..8f1281f --- /dev/null +++ b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/ContinuousDistributionTest.java @@ -0,0 +1,89 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.statistics.distribution; + +import org.apache.commons.rng.UniformRandomProvider; +import org.junit.jupiter.api.Assertions; +import org.junit.jupiter.api.Test; + +/** + * Test default implementations in the {@link ContinuousDistribution} interface. + */ +public class ContinuousDistributionTest { + /** + * Test the default interface methods + */ + @Test + public void testDefaultMethods() { + final double high = 0.54; + final double low = 0.313; + + final ContinuousDistribution dist = new ContinuousDistribution() { + @Override + public boolean isSupportConnected() { + return false; + } + @Override + public double inverseCumulativeProbability(double p) { + return 0; + } + @Override + public double getVariance() { + return 0; + } + @Override + public double getSupportUpperBound() { + return 0; + } + @Override + public double getSupportLowerBound() { + return 0; + } + @Override + public double getMean() { + return 0; + } + @Override + public double density(double x) { + // Return input value for testing + return x; + } + @Override + public double cumulativeProbability(double x) { + // For the default probability(double, double) method + return x > 1 ? high : low; + } + @Override + public Sampler createSampler(UniformRandomProvider rng) { + return null; + } + }; + + for (final double x : new double[] {Double.NaN, Double.POSITIVE_INFINITY, + Double.NEGATIVE_INFINITY, 0, 1, 0.123}) { + // Always zero + Assertions.assertEquals(0, dist.probability(x)); + + // Return the log of the density + Assertions.assertEquals(Math.log(x), dist.logDensity(x)); + } + + // Should throw for bad range + Assertions.assertThrows(DistributionException.class, () -> dist.probability(0.5, 0.4)); + Assertions.assertEquals(high - low, dist.probability(0.5, 1.5)); + } +}
