/*
    * 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.io.comparator;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.BufferedOutputStream;
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.util.ArrayList;
  import java.util.Comparator;
  import java.util.List;
  
  import org.apache.commons.io.test.TestUtils;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link CompositeFileComparator}.
   */
  public class CompositeFileComparatorTest extends ComparatorAbstractTest {
  
      @BeforeEach
      public void setUp() throws Exception {
          comparator = new CompositeFileComparator(SizeFileComparator.SIZE_COMPARATOR, ExtensionFileComparator.EXTENSION_COMPARATOR);
          reverse = new ReverseFileComparator(comparator);
          lessFile   = new File(dir, "xyz.txt");
          equalFile1 = new File(dir, "foo.txt");
          equalFile2 = new File(dir, "bar.txt");
          moreFile   = new File(dir, "foo.xyz");
          if (!lessFile.getParentFile().exists()) {
              throw new IOException("Cannot create file " + lessFile
                      + " as the parent directory does not exist");
          }
  
          try (BufferedOutputStream output3 =
                  new BufferedOutputStream(Files.newOutputStream(lessFile.toPath()))) {
              TestUtils.generateTestData(output3, 32);
          }
          if (!equalFile1.getParentFile().exists()) {
              throw new IOException("Cannot create file " + equalFile1
                      + " as the parent directory does not exist");
          }
          try (BufferedOutputStream output2 =
                  new BufferedOutputStream(Files.newOutputStream(equalFile1.toPath()))) {
              TestUtils.generateTestData(output2, 48);
          }
          if (!equalFile2.getParentFile().exists()) {
              throw new IOException("Cannot create file " + equalFile2
                      + " as the parent directory does not exist");
          }
          try (BufferedOutputStream output1 =
                  new BufferedOutputStream(Files.newOutputStream(equalFile2.toPath()))) {
              TestUtils.generateTestData(output1, 48);
          }
          if (!moreFile.getParentFile().exists()) {
              throw new IOException("Cannot create file " + moreFile
                      + " as the parent directory does not exist");
          }
          try (BufferedOutputStream output =
                  new BufferedOutputStream(Files.newOutputStream(moreFile.toPath()))) {
              TestUtils.generateTestData(output, 48);
          }
      }
  
      /**
       * Test Constructor with null array
       */
      @Test
      public void testConstructorArray_Null() {
          final Comparator<File> c = new CompositeFileComparator((Comparator<File>[]) null);
          assertEquals(0, c.compare(lessFile, moreFile), "less,more");
          assertEquals(0, c.compare(moreFile, lessFile), "more,less");
          assertEquals("CompositeFileComparator{}", c.toString(), "toString");
      }
  
      /**
       * Test Constructor with null Iterable
       */
      @Test
      public void testConstructorIterable_Null() {
          final Comparator<File> c = new CompositeFileComparator((Iterable<Comparator<File>>) null);
          assertEquals(0, c.compare(lessFile, moreFile), "less,more");
         assertEquals(0, c.compare(moreFile, lessFile), "more,less");
         assertEquals("CompositeFileComparator{}", c.toString(), "toString");
     }
 
     /**
      * Test Constructor with null Iterable
      */
     @Test
     public void testConstructorIterable_order() {
         final List<Comparator<File>> list = new ArrayList<>();
         list.add(SizeFileComparator.SIZE_COMPARATOR);
         list.add(ExtensionFileComparator.EXTENSION_COMPARATOR);
         final Comparator<File> c = new CompositeFileComparator(list);
 
         assertEquals(0, c.compare(equalFile1, equalFile2), "equal");
         assertTrue(c.compare(lessFile, moreFile) < 0, "less");
         assertTrue(c.compare(moreFile, lessFile) > 0, "more");
     }
 }