@Test
public void testIterator() {

	Iterator<BusLine> iterator;
	iterator = this.network.iterator();
	assertFalse(iterator.hasNext());
	initTest();
	iterator = this.network.iterator();
	assertTrue(iterator.hasNext());
	assertSame(this.line1, iterator.next());
	assertTrue(iterator.hasNext());
	assertSame(this.line2, iterator.next());
	assertFalse(iterator.hasNext());
}