/*
    * 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.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  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 single-value targets.
   */
  public class PaletteEntryForValueTest {
  
      public PaletteEntryForValueTest() {
      }
  
      @Test
      public void testFaultyConstructors() {
          assertThrows(IllegalArgumentException.class, () -> new PaletteEntryForValue(0.0f, null), "Constructor failed to detect invalid color");
      }
  
      /**
       * Test of getARGB method, of class PaletteEntryForValue.
       */
      @Test
      public void testGetARGB() {
          final Color c0 = new Color(0xff0000ff);
          PaletteEntryForValue instance = new PaletteEntryForValue(0.0f, c0);
          int a0 = instance.getArgb(0.0f);
          int a1 = instance.getArgb(0.5f);
          final int a2 = instance.getArgb(Float.NaN);
          assertEquals(0xff0000ff, a0, "Invalid value for target 0.0f");
          assertEquals(0, a1, "Invalid value for target 0.5f");
          assertEquals(0, a2, "Invalid value for target NaN");
          instance = new PaletteEntryForValue(Float.NaN, c0);
          a0 = instance.getArgb(0.0f);
          a1 = instance.getArgb(Float.NaN);
          assertEquals(0, a0, "Invalid value for target 0.0f");
          assertEquals(0xff0000ff, a1, "Invalid value for target NaN");
      }
  
      /**
       * Test of getColor method, of class PaletteEntryForValue.
       */
      @Test
      public void testGetColor() {
          final Color cTest = new Color(0xff0000ff);
          PaletteEntryForValue instance = new PaletteEntryForValue(0.0f, cTest);
          Color c0 = instance.getColor(0.0f);
          final int a0 = c0.getRGB();
          assertEquals(0xff0000ff, a0, "Invalid value for 0.0f");
          c0 = instance.getColor(1f);
          assertNull(c0, "Non-null return for invalid target 1.0f");
          c0 = instance.getColor(Float.NaN);
          assertNull(c0, "Non-null return for invalid target 1.0f");
          instance = new PaletteEntryForValue(Float.NaN, cTest);
          c0 = instance.getColor(Float.NaN);
          assertNotNull(c0, "Invalid return for valid target Float.NaN");
          c0 = instance.getColor(1.0f);
          assertNull(c0, "Invalid return for invalid valid target 1.0f");
  
      }
  
      /**
       * Test of isCovered method, of class PaletteEntryForValue.
       */
      @Test
      public void testIsCovered() {
          final Color c0 = new Color(0xff0000ff);
          PaletteEntryForValue instance = new PaletteEntryForValue(0.0f, c0);
          assertTrue(instance.isCovered(0.0f), "Zero value must be covered");
          assertFalse(instance.isCovered(1.0f), "Value 1.0 must not be covered");
          instance = new PaletteEntryForValue(Float.NaN, c0);
          assertTrue(instance.isCovered(Float.NaN), "NaN value must be covered");
          assertFalse(instance.isCovered(1.0f), "Value 1.0 must not be covered");
  
      }
  }