| /* |
| * 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.math4.legacy.fitting; |
| |
| import java.util.List; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.apache.commons.numbers.core.Precision; |
| |
| /** |
| * Tests {@link WeightedObservedPoints}. |
| * |
| */ |
| public class WeightedObservedPointsTest { |
| @Test |
| public void testAdd1() { |
| final WeightedObservedPoints store = new WeightedObservedPoints(); |
| |
| final double x = 1.2; |
| final double y = 34.56; |
| final double w = 0.789; |
| |
| store.add(w, x, y); |
| |
| Assert.assertTrue(lastElementIsSame(store, new WeightedObservedPoint(w, x, y))); |
| } |
| |
| @Test |
| public void testAdd2() { |
| final WeightedObservedPoints store = new WeightedObservedPoints(); |
| |
| final double x = 1.2; |
| final double y = 34.56; |
| final double w = 0.789; |
| |
| store.add(new WeightedObservedPoint(w, x, y)); |
| |
| Assert.assertTrue(lastElementIsSame(store, new WeightedObservedPoint(w, x, y))); |
| } |
| |
| @Test |
| public void testAdd3() { |
| final WeightedObservedPoints store = new WeightedObservedPoints(); |
| |
| final double x = 1.2; |
| final double y = 34.56; |
| |
| store.add(x, y); |
| |
| Assert.assertTrue(lastElementIsSame(store, new WeightedObservedPoint(1, x, y))); |
| } |
| |
| @Test |
| public void testClear() { |
| final WeightedObservedPoints store = new WeightedObservedPoints(); |
| |
| store.add(new WeightedObservedPoint(1, 2, 3)); |
| store.add(new WeightedObservedPoint(2, -1, -2)); |
| Assert.assertTrue(store.toList().size() == 2); |
| |
| store.clear(); |
| Assert.assertTrue(store.toList().isEmpty()); |
| } |
| |
| // Ensure that an instance returned by "toList()" is independent from |
| // the original container. |
| @Test |
| public void testToListCopy() { |
| final WeightedObservedPoints store = new WeightedObservedPoints(); |
| |
| store.add(new WeightedObservedPoint(1, 2, 3)); |
| store.add(new WeightedObservedPoint(2, -3, -4)); |
| |
| final List<WeightedObservedPoint> list = store.toList(); |
| Assert.assertEquals(2, list.size()); |
| |
| // Adding an element to "list" has no impact on "store". |
| list.add(new WeightedObservedPoint(1.2, 3.4, 5.6)); |
| Assert.assertNotEquals(list.size(), store.toList().size()); |
| |
| // Clearing "store" has no impact on "list". |
| store.clear(); |
| Assert.assertFalse(list.isEmpty()); |
| } |
| |
| /** |
| * Checks that the contents of the last element is equal to the |
| * contents of {@code p}. |
| * |
| * @param store Container. |
| * @param point Observation. |
| * @return {@code true} if both elements have the same contents. |
| */ |
| private boolean lastElementIsSame(WeightedObservedPoints store, |
| WeightedObservedPoint point) { |
| final List<WeightedObservedPoint> list = store.toList(); |
| final WeightedObservedPoint lastPoint = list.get(list.size() - 1); |
| |
| if (!Precision.equals(lastPoint.getX(), point.getX())) { |
| return false; |
| } |
| if (!Precision.equals(lastPoint.getY(), point.getY())) { |
| return false; |
| } |
| if (!Precision.equals(lastPoint.getWeight(), point.getWeight())) { |
| return false; |
| } |
| |
| return true; |
| } |
| } |