assertFalse(cflow.inCflow());
assertFalse(cflow.inCflowBelow());
Thread t = new Thread() {
public void run() {
System.out.println(Thread.currentThread());
cflow.enter();
assertTrue(cflow.inCflow());
assertTrue( ! cflow.inCflowBelow());
cflow.enter();
assertTrue(cflow.inCflow());
assertFalse( ! cflow.inCflowBelow());