/*
    * 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.imaging.formats.tiff;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.Arrays;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Provides unit tests for the TIFF simple-statistics class
   */
  public class TiffRasterStatisticsTest {
  
      int width = 11;
      int height = 10;
      float[] data;
      TiffRasterData raster;
      float meanValue;
      TiffRasterStatistics stat0;
      TiffRasterStatistics stat1;
  
      public TiffRasterStatisticsTest() {
          double sum = 0;
          data = new float[width * height];
          int k = 0;
          for (int i = 0; i < width; i++) {
              for (int j = 0; j < height; j++) {
                  data[k] = k;
                  sum += k;
                  k++;
              }
          }
          data[width * height / 2] = Float.NaN;
          raster = new TiffRasterDataFloat(width, height, data);
          meanValue = (float) (sum / k);
          stat0 = raster.getSimpleStatistics();
          stat1 = raster.getSimpleStatistics(stat0.getMaxValue());
      }
  
      /**
       * Test of getCountOfNulls method, of class TiffRasterStatistics.
       */
      @Test
      public void testGetCountOfNulls() {
          assertEquals(1, stat0.getCountOfNulls());
          assertEquals(1, stat1.getCountOfNulls());
      }
  
      /**
       * Test of getCountOfSamples method, of class TiffRasterStatistics.
       */
      @Test
      public void testGetCountOfSamples() {
          assertEquals(width * height - 1, stat0.getCountOfSamples());
          assertEquals(width * height - 2, stat1.getCountOfSamples());
      }
  
      /**
       * Test of getExcludedValue method, of class TiffRasterStatistics.
       */
      @Test
      public void testGetExcludedValue() {
          assertTrue(Float.isNaN(stat0.getExcludedValue()));
          assertEquals(width * height - 1, stat1.getExcludedValue());
      }
  
      /**
       * Test of getMaxValue method, of class TiffRasterStatistics.
       */
      @Test
      public void testGetMaxValue() {
          assertEquals(width * height - 1, stat0.getMaxValue());
          assertEquals(width * height - 2, stat1.getMaxValue());
      }
  
      /**
       * Test of getMeanValue method, of class TiffRasterStatistics.
       */
      @Test
      public void testGetMeanValue() {
         assertNotEquals(0, stat0.getMeanValue());
 
         final float[] zero = new float[100];
         Arrays.fill(zero, 10);
         final TiffRasterData zeroData = new TiffRasterDataFloat(10, 10, zero);
         final TiffRasterStatistics zeroStat = zeroData.getSimpleStatistics(10);
         assertEquals(0.0f, zeroStat.getMeanValue(), "Invalid mean data for excluded value");
     }
 
     /**
      * Test of getMinValue method, of class TiffRasterStatistics.
      */
     @Test
     public void testGetMinValue() {
         assertEquals(0, stat0.getMinValue());
         assertEquals(0, stat1.getMinValue());
     }
 
     /**
      * Test of isAnExcludedValueSet method, of class TiffRasterStatistics.
      */
     @Test
     public void testIsAnExcludedValueSet() {
         assertFalse(stat0.isAnExcludedValueSet());
         assertTrue(stat1.isAnExcludedValueSet());
     }
 
 }