/*
    * 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.rng.sampling.shape;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test for {@link Coordinates} utility class.
   */
  class CoordinatesTest {
      /**
       * Test {@link Coordinates#requireFinite(double[], String)} detects infinite and NaN.
       */
      @Test
      void testRequireFiniteWithMessageThrows() {
          final double[] c = {0, 1, 2};
          final String message = "This should be prepended";
          Assertions.assertSame(c, Coordinates.requireFinite(c, message));
          final double[] bad = {Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NaN};
          for (int i = 0; i < c.length; i++) {
              final int ii = i;
              for (final double d : bad) {
                  final double value = c[i];
                  c[i] = d;
                  final IllegalArgumentException ex = Assertions.assertThrows(IllegalArgumentException.class,
                      () -> Coordinates.requireFinite(c, message),
                      () -> String.format("Did not detect non-finite coordinate: %d = %s", ii, d));
                  Assertions.assertTrue(ex.getMessage().startsWith(message), "Missing message prefix");
                  c[i] = value;
              }
          }
      }
  
      /**
       * Test {@link Coordinates#requireLength(double[], int, String)} detects invalid lengths.
       */
      @Test
      void testRequireLengthWithMessageThrows() {
          final String message = "This should be prepended";
          for (final double[] c : new double[][] {{0, 1}, {0, 1, 2}}) {
              final int length = c.length;
              Assertions.assertSame(c, Coordinates.requireLength(c, length, message));
              IllegalArgumentException ex = Assertions.assertThrows(IllegalArgumentException.class,
                  () -> Coordinates.requireLength(c, length - 1, message),
                  () -> "Did not detect length was too long: " + (length - 1));
              Assertions.assertTrue(ex.getMessage().startsWith(message), "Missing message prefix");
              ex = Assertions.assertThrows(IllegalArgumentException.class,
                  () -> Coordinates.requireLength(c, length + 1, message),
                  () -> "Did not detect length was too short: " + (length + 1));
              Assertions.assertTrue(ex.getMessage().startsWith(message), "Missing message prefix");
          }
      }
  }