/*
    * 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.photometricinterpreters.floatingpoint;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.awt.Color;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Performs unit tests for palette entries based on range of values.
   */
  public class PaletteEntryForRangeTest {
  
      public PaletteEntryForRangeTest() {
      }
  
      /**
       * Test of coversSingleEntry method, of class PaletteEntryForRange.
       */
      @Test
      public void testCoversSingleEntry() {
          final Color c0 = new Color(0xff0000ff);
          final Color c1 = new Color(0xff00ff00);
          final PaletteEntryForRange instance = new PaletteEntryForRange(0.0f, 1.0f, c0, c1);
          assertFalse(instance.coversSingleEntry());
      }
  
      @Test
      public void testFaultyConstructors() {
          final Color c0 = new Color(0xff0000ff);
          final Color c1 = new Color(0xff00ff00);
  
          // test the two-color variations
          assertThrows(IllegalArgumentException.class, () -> new PaletteEntryForRange(0.0f, 0.0f, c0, c1), "Constructor failed to detect invalid range");
  
          assertThrows(IllegalArgumentException.class, () -> new PaletteEntryForRange(0.0f, 1.0f, null, c1), "Constructor failed to detect null color");
  
          assertThrows(IllegalArgumentException.class, () -> new PaletteEntryForRange(0.0f, 1.0f, c0, null), "Constructor failed to detect invalid color");
  
          // test the one-color variations
          assertThrows(IllegalArgumentException.class, () -> new PaletteEntryForRange(0.0f, 0.0f, c0), "Constructor failed to detect invalid range");
  
          assertThrows(IllegalArgumentException.class, () -> new PaletteEntryForRange(0.0f, 1.0f, null), "Constructor failed to detect null color");
      }
  
      /**
       * Test of getARGB method, of class PaletteEntryForRange.
       */
      @Test
      public void testGetARGB() {
          final Color c0 = new Color(0xff0000ff);
          final Color c1 = new Color(0xff00ff00);
          final PaletteEntryForRange instance = new PaletteEntryForRange(0.0f, 1.0f, c0, c1);
          final int a0 = instance.getArgb(0.0f);
          final int a1 = instance.getArgb(0.5f);
          assertEquals(0xff0000ff, a0, "Invalid value for 0.0f");
          assertEquals(0xff008080, a1, "Invalid interpolated values");
      }
  
      /**
       * Test of getColor method, of class PaletteEntryForRange.
       */
      @Test
      public void testGetColor() {
          Color c0 = new Color(0xff0000ff);
          Color c1 = new Color(0xff00ff00);
          final PaletteEntryForRange instance = new PaletteEntryForRange(0.0f, 1.0f, c0, c1);
          c0 = instance.getColor(0.0f);
          c1 = instance.getColor(0.5f);
          final int a0 = c0.getRGB();
          final int a1 = c1.getRGB();
          assertEquals(0xff0000ff, a0, "Invalid value for 0.0f");
          assertEquals(0xff008080, a1, "Invalid interpolated values");
  
      }
  
      /**
       * Test of getLowerBound method, of class PaletteEntryForRange.
       */
      @Test
     public void testGetLowerBound() {
         final Color c0 = new Color(0xff0000ff);
         final Color c1 = new Color(0xff00ff00);
         final PaletteEntryForRange instance = new PaletteEntryForRange(0.0f, 1.0f, c0, c1);
         assertEquals(0.0f, instance.getLowerBound());
     }
 
     /**
      * Test of getUpperBound method, of class PaletteEntryForRange.
      */
     @Test
     public void testGetUpperBound() {
         final Color c0 = new Color(0xff0000ff);
         final Color c1 = new Color(0xff00ff00);
         final PaletteEntryForRange instance = new PaletteEntryForRange(0.0f, 1.0f, c0, c1);
         assertEquals(1.0f, instance.getUpperBound());
     }
 
     /**
      * Test of isCovered method, of class PaletteEntryForRange.
      */
     @Test
     public void testIsCovered() {
         final Color c0 = new Color(0xff0000ff);
         final Color c1 = new Color(0xff00ff00);
         final PaletteEntryForRange instance = new PaletteEntryForRange(0.0f, 1.0f, c0, c1);
         assertTrue(instance.isCovered(0.0f), "Zero value must be covered");
         assertFalse(instance.isCovered(1.0f), "Value 1.0 must not be covered");
     }
 }