/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.util;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.PrintWriter;
  import java.net.MalformedURLException;
  import java.net.URL;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  /**
   * Unit tests for {@link LocationUtil}.
   *
   * @author Carl Harris
   */
  public class LocationUtilTest {
  
      private static final String TEST_CLASSPATH_RESOURCE = "util/testResource.txt";
      private static final String TEST_PATTERN = "TEST RESOURCE";
  
      @Test
      public void testImplicitClasspathUrl() throws Exception {
          URL url = LocationUtil.urlForResource(TEST_CLASSPATH_RESOURCE);
          validateResource(url);
      }
  
      @Test
      public void testExplicitClasspathUrl() throws Exception {
          URL url = LocationUtil.urlForResource(LocationUtil.CLASSPATH_SCHEME + TEST_CLASSPATH_RESOURCE);
          validateResource(url);
      }
  
      @Test
      public void testExplicitClasspathUrlWithLeadingSlash() throws Exception {
          URL url = LocationUtil.urlForResource(LocationUtil.CLASSPATH_SCHEME + "/" + TEST_CLASSPATH_RESOURCE);
          validateResource(url);
      }
  
      @Test
      public void testExplicitClasspathUrlEmptyPath() throws Exception {
          Assertions.assertThrows(MalformedURLException.class, () -> {
              LocationUtil.urlForResource(LocationUtil.CLASSPATH_SCHEME);
          });
      }
  
      @Test
      public void testExplicitClasspathUrlWithRootPath() throws Exception {
          Assertions.assertThrows(MalformedURLException.class, () -> {
              LocationUtil.urlForResource(LocationUtil.CLASSPATH_SCHEME + "/");
          });
      }
  
      @Test
      public void testFileUrl() throws Exception {
          File file = File.createTempFile("testResource", ".txt");
          file.deleteOnExit();
          PrintWriter writer = new PrintWriter(file);
          writer.println(TEST_PATTERN);
          writer.close();
          URL url = file.toURI().toURL();
          validateResource(url);
      }
  
      private void validateResource(URL url) throws IOException {
          InputStream inputStream = url.openStream();
          try {
              BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
              String line = reader.readLine();
              Assertions.assertEquals(TEST_PATTERN, line);
          } finally {
              try {
                  inputStream.close();
              } catch (IOException ex) {
                  // ignore close exception
                  ex.printStackTrace(System.err);
              }
          }
      }
  
  }