import java.io.*;

boolean result = true;

result = result && new File( basedir, "target/parent-1.0-bin/lib/child1.jar" ).exists();
result = result && new File( basedir, "target/parent-1.0-bin/lib/child3.jar" ).exists();

result = result && !new File( basedir, "target/parent-1.0-bin/lib/child2.jar" ).exists();

return result;