src/test/java/org/apache/maven/plugins/repository/testutil/Assertions.java

package org.apache.maven.plugins.repository.testutil;

/*
 * 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 java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.zip.ZipFile;

import junit.framework.Assert;

public final class Assertions
{
    
    public static final Set<String> EMPTY_ENTRY_NAMES = Collections.emptySet();

    public static void assertZipContents( Iterable<String> requiredNames, Iterable<String> bannedNames, File bundleSource )
        throws IOException
    {
        ZipFile zf = new ZipFile( bundleSource );

        Set<String> missing = new HashSet<String>();
        for ( String name : requiredNames )
        {
            if ( zf.getEntry( name ) == null )
            {
                missing.add( name );
            }
        }

        Set<String> banned = new HashSet<String>();
        for ( String name : bannedNames )
        {
            if ( zf.getEntry( name ) != null )
            {
                banned.add( name );
            }
        }

        zf.close();
        if ( !missing.isEmpty() || !banned.isEmpty() )
        {
            StringBuilder msg = new StringBuilder();
            msg.append( "The following REQUIRED entries were missing from the bundle archive:\n" );

            if ( missing.isEmpty() )
            {
                msg.append( "\nNone." );
            }
            else
            {
                for ( String name : missing )
                {
                    msg.append( "\n" ).append( name );
                }
            }

            msg.append( "\n\nThe following BANNED entries were present from the bundle archive:\n" );

            if ( banned.isEmpty() )
            {
                msg.append( "\nNone.\n" );
            }
            else
            {
                for ( String name : banned )
                {
                    msg.append( "\n" ).append( name );
                }
            }

            Assert.fail( msg.toString() );
        }
    }
}