/*
    * 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
    *
    *      https://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.lang3;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  import org.apache.commons.lang3.function.FailableIntFunction;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link ArrayFill}.
   */
  class ArrayFillTest extends AbstractLangTest {
  
      @Test
      void testClearByteArray() {
          final byte[] array = new byte[3];
          final byte val = 0;
          final byte[] actual = ArrayFill.clear(array);
          assertSame(array, actual);
          for (final byte v : actual) {
              assertEquals(val, v);
          }
      }
  
      @Test
      void testClearByteArrayNull() {
          final byte[] array = null;
          final byte[] actual = ArrayFill.clear(array);
          assertSame(array, actual);
      }
  
      @Test
      void testClearCharArray() {
          final char[] array = new char[3];
          final char val = 0;
          final char[] actual = ArrayFill.clear(array);
          assertSame(array, actual);
          for (final char v : actual) {
              assertEquals(val, v);
          }
      }
  
      @Test
      void testClearCharArrayNull() {
          final char[] array = null;
          final char[] actual = ArrayFill.clear(array);
          assertSame(array, actual);
      }
  
      @Test
      void testClearCharArrayRange() {
          final char[] array = {'A', 'B', 'C', 'D', 'E'};
          final char[] actual = ArrayFill.clear(array, 1, 4);
          assertSame(array, actual);
          assertEquals('A', actual[0]);
          assertEquals('\0', actual[1]);
          assertEquals('\0', actual[2]);
          assertEquals('\0', actual[3]);
          assertEquals('E', actual[4]);
      }
  
      @Test
      void testClearCharArrayRangeNull() {
          final char[] actual = ArrayFill.clear(null, 0, 0);
          assertNull(actual);
      }
  
      @Test
      void testFillBooleanArray() {
          final boolean[] array = new boolean[3];
          final boolean val = true;
          final boolean[] actual = ArrayFill.fill(array, val);
          assertSame(array, actual);
          for (final boolean v : actual) {
              assertEquals(val, v);
          }
      }
  
      @Test
      void testFillBooleanArrayNull() {
         final boolean[] array = null;
         final boolean val = true;
         final boolean[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillByteArray() {
         final byte[] array = new byte[3];
         final byte val = 1;
         final byte[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final byte v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillByteArrayNull() {
         final byte[] array = null;
         final byte val = 1;
         final byte[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillCharArray() {
         final char[] array = new char[3];
         final char val = 1;
         final char[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final char v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillCharArrayNull() {
         final char[] array = null;
         final char val = 1;
         final char[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillCharArrayRange() {
         final char[] array = {'A', 'B', 'C', 'D', 'E'};
         final char val = 'Z';
         final char[] actual = ArrayFill.fill(array, 1, 4, val);
         assertSame(array, actual);
         assertEquals('A', actual[0]);
         assertEquals('Z', actual[1]);
         assertEquals('Z', actual[2]);
         assertEquals('Z', actual[3]);
         assertEquals('E', actual[4]);
     }
 
     @Test
     void testFillCharArrayRangeEmpty() {
         final char[] array = {'A', 'B', 'C'};
         final char[] actual = ArrayFill.fill(array, 1, 1, 'Z');
         assertSame(array, actual);
         assertArrayEquals(new char[] {'A', 'B', 'C'}, actual);
     }
 
     @Test
     void testFillCharArrayRangeNull() {
         final char[] actual = ArrayFill.fill(null, 0, 0, 'Z');
         assertNull(actual);
     }
 
     @Test
     void testFillDoubleArray() {
         final double[] array = new double[3];
         final double val = 1;
         final double[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final double v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillDoubleArrayNull() {
         final double[] array = null;
         final double val = 1;
         final double[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillFloatArray() {
         final float[] array = new float[3];
         final float val = 1;
         final float[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final float v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillFloatArrayNull() {
         final float[] array = null;
         final float val = 1;
         final float[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillFunction() throws Exception {
         final FailableIntFunction<?, Exception> nullIntFunction = null;
         assertNull(ArrayFill.fill(null, nullIntFunction));
         assertArrayEquals(null, ArrayFill.fill(null, nullIntFunction));
         assertArrayEquals(ArrayUtils.EMPTY_BOOLEAN_OBJECT_ARRAY, ArrayFill.fill(ArrayUtils.EMPTY_BOOLEAN_OBJECT_ARRAY, nullIntFunction));
         assertArrayEquals(ArrayUtils.EMPTY_OBJECT_ARRAY, ArrayFill.fill(ArrayUtils.EMPTY_OBJECT_ARRAY, nullIntFunction));
         final Integer[] array = new Integer[10];
         final Integer[] array2 = ArrayFill.fill(array, Integer::valueOf);
         assertSame(array, array2);
         for (int i = 0; i < array.length; i++) {
             assertEquals(i, array[i].intValue());
         }
     }
 
     @Test
     void testFillIntArray() {
         final int[] array = new int[3];
         final int val = 1;
         final int[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final int v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillIntArrayNull() {
         final int[] array = null;
         final int val = 1;
         final int[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillLongArray() {
         final long[] array = new long[3];
         final long val = 1;
         final long[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final long v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillLongArrayNull() {
         final long[] array = null;
         final long val = 1;
         final long[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillObjectArray() {
         final String[] array = new String[3];
         final String val = "A";
         final String[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final String v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillObjectArrayNull() {
         final Object[] array = null;
         final Object val = 1;
         final Object[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 
     @Test
     void testFillShortArray() {
         final short[] array = new short[3];
         final short val = 1;
         final short[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
         for (final short v : actual) {
             assertEquals(val, v);
         }
     }
 
     @Test
     void testFillShortArrayNull() {
         final short[] array = null;
         final short val = 1;
         final short[] actual = ArrayFill.fill(array, val);
         assertSame(array, actual);
     }
 }