| /* |
| * 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.numbers.arrays; |
| |
| import java.util.Arrays; |
| import org.junit.jupiter.api.Assertions; |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * Test cases for the {@link MultidimensionalCounter} class. |
| * |
| */ |
| public class MultidimensionalCounterTest { |
| @Test |
| void testPreconditions() { |
| Assertions.assertThrows(IllegalArgumentException.class, () -> MultidimensionalCounter.of(0, 1)); |
| Assertions.assertThrows(IllegalArgumentException.class, () -> MultidimensionalCounter.of(2, 0)); |
| Assertions.assertThrows(IllegalArgumentException.class, () -> MultidimensionalCounter.of(-1, 1)); |
| Assertions.assertThrows(IllegalArgumentException.class, () -> MultidimensionalCounter.of(-1, -1)); |
| Assertions.assertThrows(IllegalArgumentException.class, () -> MultidimensionalCounter.of(Integer.MAX_VALUE, 2, Integer.MAX_VALUE)); |
| |
| final MultidimensionalCounter c = MultidimensionalCounter.of(2, 3); |
| Assertions.assertThrows(IllegalArgumentException.class, () -> c.toUni(1, 1, 1)); |
| Assertions.assertThrows(IndexOutOfBoundsException.class, () -> c.toUni(3, 1)); |
| Assertions.assertThrows(IndexOutOfBoundsException.class, () -> c.toUni(0, -1)); |
| Assertions.assertThrows(IndexOutOfBoundsException.class, () -> c.toMulti(-1)); |
| Assertions.assertThrows(IndexOutOfBoundsException.class, () -> c.toMulti(6)); |
| } |
| |
| @Test |
| void testMulti2UniConversion() { |
| final MultidimensionalCounter c = MultidimensionalCounter.of(2, 4, 5); |
| Assertions.assertEquals(33, c.toUni(1, 2, 3)); |
| |
| for (int i = 0, max = c.getSize(); i < max; i++) { |
| Assertions.assertEquals(i, c.toUni(c.toMulti(i))); |
| } |
| } |
| |
| @Test |
| void testAccessors() { |
| final int[] originalSize = new int[] {2, 6, 5}; |
| final MultidimensionalCounter c = MultidimensionalCounter.of(originalSize); |
| final int nDim = c.getDimension(); |
| Assertions.assertEquals(nDim, originalSize.length); |
| |
| final int[] size = c.getSizes(); |
| for (int i = 0; i < nDim; i++) { |
| Assertions.assertEquals(originalSize[i], size[i]); |
| } |
| } |
| |
| @Test |
| void testIterationConsistency() { |
| final MultidimensionalCounter c = MultidimensionalCounter.of(2, 3, 4); |
| final int[][] expected = new int[][] { |
| {0, 0, 0}, |
| {0, 0, 1}, |
| {0, 0, 2}, |
| {0, 0, 3}, |
| {0, 1, 0}, |
| {0, 1, 1}, |
| {0, 1, 2}, |
| {0, 1, 3}, |
| {0, 2, 0}, |
| {0, 2, 1}, |
| {0, 2, 2}, |
| {0, 2, 3}, |
| {1, 0, 0}, |
| {1, 0, 1}, |
| {1, 0, 2}, |
| {1, 0, 3}, |
| {1, 1, 0}, |
| {1, 1, 1}, |
| {1, 1, 2}, |
| {1, 1, 3}, |
| {1, 2, 0}, |
| {1, 2, 1}, |
| {1, 2, 2}, |
| {1, 2, 3} |
| }; |
| |
| final int totalSize = c.getSize(); |
| Assertions.assertEquals(expected.length, totalSize); |
| |
| final int nDim = c.getDimension(); |
| for (int i = 0; i < totalSize; i++) { |
| Assertions.assertEquals(i, c.toUni(expected[i]), |
| "Wrong unidimensional index for [" + i + "]"); |
| |
| final int[] indices = c.toMulti(i); |
| for (int dimIndex = 0; dimIndex < nDim; dimIndex++) { |
| Assertions.assertEquals(expected[i][dimIndex], indices[dimIndex], |
| "Wrong multidimensional index for [" + i + "][" + dimIndex + "]"); |
| } |
| } |
| } |
| |
| @Test |
| void testToString() { |
| final int[] sizes = new int[] {7, 5, 3, 1}; |
| final MultidimensionalCounter c = MultidimensionalCounter.of(sizes); |
| Assertions.assertEquals(Arrays.toString(sizes), c.toString()); |
| } |
| } |