public void test_transfer() {
		int c1 = b1.createAccount("John", 5, 500.5);
		assertEquals(c1,1);
		int c2 = b1.createAccount("John", 20,  800.);
		assertEquals(c2,2);
		try{
			b1.transfer(c1, c2, 8, 400);
		}
		catch(InvalidCode ic) {
			fail("codes 1 and 2 are valid");
		}
		catch(InvalidValue iv) {
			fail("value 400. is valid"); <---------------ERRORE
		}
		try{
			b1.transfer(c1, 3, 8, 400);
			fail("code 2 is not valid");
		}
		catch(InvalidCode ic) {
		}
		catch(InvalidValue iv) {
		}
		try{
			b1.transfer(3, c1, 8, 400);
			fail("code 2 is not valid");
		}
		catch(InvalidCode ic) {
		}
		catch(InvalidValue iv) {
		}
		try{
			b1.transfer(c1, c2, 8, 600);
			fail("value 600. is not valid");
		}
		catch(InvalidCode ic) {
			fail("codes 1 and 2 are valid");
		}
		catch(InvalidValue iv) {
		}
	}


public void test_withdraw() {
		int c1 = b1.createAccount("John", 5, 500.5);
		assertEquals(c1,1);
		try{
			b1.withdraw(c1, 7, 360.);
		}
		catch(InvalidCode ic) {
			fail("code 1 is valid");
		}
		catch(InvalidValue iv) {
			fail("value 360. is valid"); <--------ERRORE-------
		}
		try{
			b1.withdraw(2, 7, 360.);
			fail("code 2 is not valid");
		}
		catch(InvalidCode ic) {
		}
		catch(InvalidValue iv) {
		}
		try{
			b1.withdraw(c1, 7, 700.);
			fail("value 700. is not valid");
		}
		catch(InvalidCode ic) {
			fail("code 1 is valid");
		}
		catch(InvalidValue iv) {
		}
	}