/*
 * 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.geode.util.test;

import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;

import org.apache.commons.lang.SystemUtils;
import org.apache.geode.internal.FileUtil;

public class TestUtil {

  /**
   * Return the path to a named resource. This finds the resource on the classpath using the rules
   * of class.getResource. For a relative path it will look in the same package as the class, for an
   * absolute path it will start from the base package.
   * 
   * Best practice is to put the resource in the same package as your test class and load it with
   * this method.
   * 
   * @param clazz the class to look relative too
   * @param name the name of the resource, eg "cache.xml"
   */
  public static String getResourcePath(Class<?> clazz, String name) {
    URL resource = clazz.getResource(name);
    if (resource == null) {
      throw new RuntimeException("Could not find resource " + name);
    }
    try {
      String path = resource.toURI().getPath();
      if (path == null) {
        String filename = name.replaceFirst(".*/", "");
        File tmpFile = File.createTempFile(filename, null);
        tmpFile.deleteOnExit();
        FileUtil.copy(resource, tmpFile);
        return compatibleWithWindows(tmpFile.getAbsolutePath());
      }
      return compatibleWithWindows(path);
    } catch (URISyntaxException | IOException e) {
      throw new RuntimeException("Failed getting path to resource " + name, e);
    }
  }

  private static String compatibleWithWindows(String path) {
    return SystemUtils.IS_OS_WINDOWS ? path.substring(1) : path;
  }
}