Move tests into a separate directory

Also run these tests on Github Actions as part of the PR request
flow.

tun/tests/configure.rs

@@ -11,6 +11,7 @@ fn test_create() {
 
 #[test]
 #[throws]
+#[cfg(not(target_os = "windows"))]
 fn test_set_get_ipv4() {
     let tun = TunInterface::new()?;
 
@@ -23,7 +24,7 @@ fn test_set_get_ipv4() {
 
 #[test]
 #[throws]
-#[cfg(target_os = "linux")]
+#[cfg(not(any(target_os = "windows", target_vendor = "apple")))]
 fn test_set_get_ipv6() {
     let tun = TunInterface::new()?;
 
@@ -33,3 +34,29 @@ fn test_set_get_ipv6() {
     // let result = tun.ipv6_addr()?;
     // assert_eq!(addr, result);
 }
+
+#[test]
+#[throws]
+#[cfg(not(target_os = "windows"))]
+fn test_set_get_mtu() {
+    let interf = TunInterface::new()?;
+
+    interf.set_mtu(500)?;
+
+    assert_eq!(interf.mtu().unwrap(), 500);
+}
+
+#[test]
+#[throws]
+#[cfg(not(target_os = "windows"))]
+fn test_set_get_netmask() {
+    let interf = TunInterface::new()?;
+
+    let netmask = Ipv4Addr::new(255, 0, 0, 0);
+    let addr = Ipv4Addr::new(192, 168, 1, 1);
+
+    interf.set_ipv4_addr(addr)?;
+    interf.set_netmask(netmask)?;
+
+    assert_eq!(interf.netmask()?, netmask);
+}

tun/tests/packets.rs

@@ -0,0 +1,36 @@
+use fehler::throws;
+use std::io::Error;
+use std::io::Write;
+use std::net::Ipv4Addr;
+use tun::TunInterface;
+
+#[throws]
+#[test]
+#[ignore = "requires interactivity"]
+#[cfg(not(target_os = "windows"))]
+fn tst_read() {
+    // This test is interactive, you need to send a packet to any server through 192.168.1.10
+    // EG. `sudo route add 8.8.8.8 192.168.1.10`,
+    //`dig @8.8.8.8 hackclub.com`
+    let mut tun = TunInterface::new()?;
+    println!("tun name: {:?}", tun.name()?);
+    tun.set_ipv4_addr(Ipv4Addr::from([192, 168, 1, 10]))?;
+    println!("tun ip: {:?}", tun.ipv4_addr()?);
+    println!("Waiting for a packet...");
+    let buf = &mut [0u8; 1500];
+    let res = tun.read(buf);
+    println!("Received!");
+    assert!(res.is_ok());
+}
+
+#[test]
+#[throws]
+#[ignore = "requires interactivity"]
+#[cfg(not(target_os = "windows"))]
+fn write_packets() {
+    let mut tun = TunInterface::new()?;
+    let mut buf = [0u8; 1500];
+    buf[0] = 6 << 4;
+    let bytes_written = tun.write(&buf)?;
+    assert_eq!(bytes_written, 1504);
+}