import java.io.*;

File f = new File( basedir, "target/parent-1-src/child/test.txt" );

if ( !f.exists() )
{
    System.out.println( "Filtered file from file-set: " + f + " is missing." );
    return false;
}

String line = null;

BufferedReader reader = new BufferedReader( new FileReader( f ) );
line = reader.readLine();
reader.close();

System.out.println( "First line of test.txt: '" + line + "' should equal the project version: '1'." );

return "1".equals( line.trim() );