/*
    * SPDX-License-Identifier: Apache-2.0
    * See LICENSE file for details.
    *
    * Copyright 2025-2026 Hazendaz
    * Copyright 2011-2025 Acegi Technology Pty Limited.
    */
   package au.com.acegi.xmlformat;
   
  import static au.com.acegi.xmlformat.IOUtil.hash;
  import static au.com.acegi.xmlformat.TestUtil.getResource;
  import static au.com.acegi.xmlformat.TestUtil.stringToFile;
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.CoreMatchers.not;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.io.TempDir;
  
  /**
   * Tests {@link IOUtil}.
   */
  public class IOTest {
  
      @TempDir
      private File tmp;
  
      @Test
      void hash1() throws IOException {
          testHash("/test1-in.xml", 459_402_491L);
      }
  
      @Test
      void hash2() throws IOException {
          testHash("/test2-in.xml", 1_687_393_391L);
      }
  
      @Test
      void hashInvalid() throws IOException {
          testHash("/invalid.xml", 2_274_913_643L);
      }
  
      @Test
      void hashFileMatchesStreamHash() throws IOException {
          final File file = File.createTempFile("junit", ".xml", tmp);
          stringToFile("<root><child/></root>", file);
  
          final long fileHash = hash(file);
          try (InputStream in = java.nio.file.Files.newInputStream(file.toPath())) {
              final long streamHash = hash(in);
              assertThat(fileHash, is(streamHash));
          }
      }
  
      @Test
      void hashDifferentContentProducesDifferentHash() throws IOException {
          final File file1 = File.createTempFile("junit-a", ".xml", tmp);
          final File file2 = File.createTempFile("junit-b", ".xml", tmp);
          stringToFile("<root><child/></root>", file1);
          stringToFile("<root><other/></root>", file2);
  
          assertThat(hash(file1), not(hash(file2)));
      }
  
      @Test
      void hashSameContentProducesSameHash() throws IOException {
          final File file1 = File.createTempFile("junit-c", ".xml", tmp);
          final File file2 = File.createTempFile("junit-d", ".xml", tmp);
          final String content = "<root><child/></root>";
          stringToFile(content, file1);
          stringToFile(content, file2);
  
          assertThat(hash(file1), is(hash(file2)));
      }
  
      private void testHash(final String resource, final long expected) throws IOException {
          try (InputStream in = getResource(resource)) {
              final long hash = hash(in);
              assertThat(hash, is(expected));
          }
      }
  
  }