@Test
void testPortString() {

	assertFalse(port(null));
	assertFalse(port(""));
	assertFalse(port("123456789"));
	assertFalse(port("4000g"));
	assertFalse(port("test"));
	assertFalse(port("-5000"));
	assertTrue(port("80"));
	assertTrue(port("8080"));
	assertTrue(port("10101"));
}