src/test/java/org/apache/maven/shared/jar/AbstractJarAnalyzerTestCase.java

package org.apache.maven.shared.jar;

/*
 * 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.
 */

import junit.framework.AssertionFailedError;
import org.codehaus.plexus.PlexusTestCase;

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static java.nio.charset.StandardCharsets.UTF_8;

/**
 * Abstract JarAnalyzer TestCase
 */
public abstract class AbstractJarAnalyzerTestCase
    extends PlexusTestCase
{
    protected File getSampleJar( String filename )
        throws UnsupportedEncodingException
    {
        String path = getClass().getResource( "/jars/" + filename ).getPath();
        // URLDecoder.decode necessary for JDK 1.5+, where spaces are escaped to %20
        return new File( URLDecoder.decode( path, UTF_8.name() ) );
    }

    protected void assertNotContainsRegex( String msg, String regex, Collection<String> coll )
    {
        List<String> failures = new ArrayList<>();
        Pattern pat = Pattern.compile( regex );
        for ( String value : coll )
        {
            Matcher mat = pat.matcher( value );
            if ( mat.find() )
            {
                failures.add( value );
            }
        }

        if ( !failures.isEmpty() )
        {
            StringBuilder sb = new StringBuilder();
            sb.append( msg ).append( " collection has illegal regex \"" ).append( regex ).append( "\"" );
            for ( String failure : failures )
            {
                sb.append( "\n   - \"" ).append( failure ).append( "\"" );
            }
            throw new AssertionFailedError( sb.toString() );
        }
    }
}