import java.io.*;
import java.util.jar.*;

JarFile jarFile = new JarFile( new File( basedir, "target/test-1.0-shaded.jar" ) );
Manifest mf = jarFile.getManifest();
jarFile.close();

if ( !"PASSED".equals( mf.getMainAttributes().getValue( "Test-Entry" ) ) )
{
    throw new IllegalStateException( "MANIFEST.MF is incomplete" );
}

if ( !"org.apache.maven.Main".equals( mf.getMainAttributes().getValue( "Main-Class" ) ) )
{
    throw new IllegalStateException( "MANIFEST.MF is incomplete" );
}

return true;