@Test
public void testIsSignificant() {

	assertFalse(this.hub.isSignificant());
	this.hub.addBusStop(new BusStopStub(this.busNetwork, "STOP1")); //$NON-NLS-1$
	assertFalse(this.hub.isSignificant());
	this.hub.addBusStop(new BusStopStub(this.busNetwork, "STOP2")); //$NON-NLS-1$
	assertTrue(this.hub.isSignificant());
}