/*
    * 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.png.chunks;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import org.apache.commons.imaging.ImagingException;
  import org.junit.jupiter.api.Test;
  
  public class PngChunkScalTest {
      private static final double delta = 0.001;
      private static final int chunkType = 1933787468;
  
      @Test
      public void testConstruct_InvalidDblValue() {
          assertThrows(ImagingException.class, () -> new PngChunkScal(10, chunkType, 0, new byte[] { 2, 65, 46, 48, 49, 0, 48, 46, 48, 50 }));
      }
  
      @Test
      public void testConstruct_InvalidUnitSpecifier() {
          assertThrows(ImagingException.class, () -> new PngChunkScal(10, chunkType, 0, new byte[] { 3, 48, 46, 48, 49, 0, 48, 46, 48, 50 }));
      }
  
      @Test
      public void testConstruct_MissingSeparator() {
          assertThrows(ImagingException.class, () -> new PngChunkScal(9, chunkType, 0, new byte[] { 1, 48, 46, 48, 49, 48, 46, 48, 50 }));
      }
  
      @Test
      public void testConstruct_MissingXValue() {
          assertThrows(ImagingException.class, () -> new PngChunkScal(2, chunkType, 0, new byte[] { 2, 0 }));
      }
  
      @Test
      public void testConstruct_MissingYValue() {
          assertThrows(ImagingException.class, () -> new PngChunkScal(6, chunkType, 0, new byte[] { 2, 48, 46, 48, 49, 0 }));
      }
  
      @Test
      public void testConstructMeters() throws ImagingException {
          final PngChunkScal pngChunkScal = new PngChunkScal(10, chunkType, 0, new byte[] { 1, 48, 46, 48, 49, 0, 48, 46, 48, 50 });
  
          assertEquals(pngChunkScal.getUnitSpecifier(), 1);
          assertEquals(pngChunkScal.getUnitsPerPixelXAxis(), 0.01, delta);
          assertEquals(pngChunkScal.getUnitsPerPixelYAxis(), 0.02, delta);
      }
  
      @Test
      public void testConstructRadians() throws ImagingException {
          final PngChunkScal pngChunkScal = new PngChunkScal(10, chunkType, 0, new byte[] { 2, 48, 46, 48, 49, 0, 48, 46, 48, 50 });
  
          assertEquals(pngChunkScal.getUnitSpecifier(), 2);
          assertEquals(pngChunkScal.getUnitsPerPixelXAxis(), 0.01, delta);
          assertEquals(pngChunkScal.getUnitsPerPixelYAxis(), 0.02, delta);
      }
  }