/**
* 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.mahout.cf.taste.impl.similarity;
import org.apache.mahout.cf.taste.impl.TasteTestCase;
abstract class SimilarityTestCase extends TasteTestCase {
static void assertCorrelationEquals(double expected, double actual) {
if (Double.isNaN(expected)) {
assertTrue("Correlation is not NaN", Double.isNaN(actual));
} else {
assertTrue("Correlation is NaN", !Double.isNaN(actual));
assertTrue("Correlation > 1.0", actual <= 1.0);
assertTrue("Correlation < -1.0", actual >= -1.0);
assertEquals(expected, actual, EPSILON);
}
}
}