@Test
@DisplayName("Check some localhost ports")
void checkPort_1() throws IOException {

	assertFalse(checkPort("127.0.0.1", 8923));
	try (ServerSocket socket = new ServerSocket(8923)) {
		assertTrue(checkPort("127.0.0.1", 8923));
	}
	assertFalse(checkPort("127.0.0.1", 8923));
}