/*
 * 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.maven.tools.plugin.util;

import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLDecoder;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

/**
 * @author jdcasey
 */
public class TestUtils {

    @Test
    void testDirnameFunction_METATEST() throws UnsupportedEncodingException {
        String classname = getClass().getName().replace('.', '/') + ".class";
        String basedir = TestUtils.dirname(classname);

        ClassLoader cl = Thread.currentThread().getContextClassLoader();
        URL resource = cl.getResource(classname);

        assertEquals(URLDecoder.decode(resource.getPath(), "UTF-8"), basedir + classname);
    }

    public static String dirname(String file) {
        ClassLoader cl = Thread.currentThread().getContextClassLoader();
        URL fileResource = cl.getResource(file);

        String fullPath = fileResource.getPath();

        String path = fullPath.substring(0, fullPath.length() - file.length());

        try {
            /*
             * FIXME: URL encoding and HTML form encoding are not the same. Use FileUtils.toFile(URL) from plexus-utils
             * once PLXUTILS-56 is released.
             */
            // necessary for JDK 1.5+, where spaces are escaped to %20
            return URLDecoder.decode(path, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new Error("Broken JVM, UTF-8 must be supported", e);
        }
    }
}
