@Test
	public void testSendLetter() {
		BankAccount b = new BankAccount(10);
		Inhabitant h = new Inhabitant(c,"InhabitantTest",b);
		Letter<?> l = new SimpleLetter<TextContent>(h,h, new TextContent("test"));
		c.sendLetter(l);
		for(Letter<?> letter: c.mailbox)
			assertEquals(letter,l);
	}