WarWrapTest.java

package prg.ops4j.pax.url.war;

import static org.junit.Assert.assertThat;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashSet;
import java.util.Set;
import java.util.jar.JarInputStream;
/*
 * Copyright 2008 Alin Dreghiciu.
 *
 * Licensed  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.util.jar.Manifest;

import static org.hamcrest.CoreMatchers.*;
import org.junit.Test;

public class WarWrapTest {

    @Test
    public void shouldNotProduceDuplicatePackageImports() throws IOException {
        System.setProperty("java.protocol.handler.pkgs", "org.ops4j.pax.url");
        URL url = new URL("war:file:target/dependency/wicket-examples.war");
        InputStream is = url.openStream();
        JarInputStream jis = new JarInputStream(is);
        Manifest manifest = jis.getManifest();
        String importPackage = manifest.getMainAttributes().getValue("Import-Package");
        Set<String> packages = new HashSet<String>();
        for (String directive: importPackage.split(",")) {
            String[] parts = directive.split(";");
            String pkg = parts[0];
            assertThat("duplicate package " + pkg, packages.contains(pkg), is(false));
            packages.add(pkg);
        }
        jis.close();
    }
}