import java.io.*; import java.net.*; import java.util.jar.*; boolean result = true; try { System.out.println( "Creating JarFile java.io.File." ); File jarFile = new File( basedir, "target/jar-with-dependencies-no-target-dir-1.0-SNAPSHOT-jar-with-dependencies.jar" ); System.out.println( "Checking for existence and file-ishness of: " + jarFile ); if ( !jarFile.exists() || jarFile.isDirectory() ) { System.err.println( "jar file is missing or a directory." ); return false; } System.out.println( "Creating JarFile instance." ); JarFile jf = new JarFile( jarFile ); if ( jf.getEntry( "test/App.class" ) == null ) { System.err.println( "App class is missing." ); result = false; } System.out.println( "Looking for absence of 'target/classes/test/App.class' jar entry." ); if ( jf.getEntry( "target/classes/test/App.class" ) != null ) { System.err.println( "target directory should not be present." ); result = false; } } catch( IOException e ) { e.printStackTrace(); result = false; } return result;