mirror of
https://github.com/go-micro/go-micro.git
synced 2024-11-30 08:06:40 +02:00
295 lines
5.1 KiB
Go
295 lines
5.1 KiB
Go
package tunnel
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import (
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"sync"
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"testing"
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"time"
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"github.com/micro/go-micro/transport"
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)
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// testAccept will accept connections on the transport, create a new link and tunnel on top
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func testAccept(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup) {
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defer wg.Done()
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// listen on some virtual address
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tl, err := tun.Listen("test-tunnel")
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if err != nil {
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t.Fatal(err)
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}
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// receiver ready; notify sender
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wait <- true
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// accept a connection
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c, err := tl.Accept()
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if err != nil {
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t.Fatal(err)
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}
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// get a message
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for {
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// accept the message
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m := new(transport.Message)
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if err := c.Recv(m); err != nil {
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t.Fatal(err)
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}
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if v := m.Header["test"]; v != "send" {
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t.Fatalf("Accept side expected test:send header. Received: %s", v)
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}
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// now respond
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m.Header["test"] = "accept"
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if err := c.Send(m); err != nil {
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t.Fatal(err)
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}
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wait <- true
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return
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}
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}
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// testSend will create a new link to an address and then a tunnel on top
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func testSend(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup) {
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defer wg.Done()
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// wait for the listener to get ready
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<-wait
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// dial a new session
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c, err := tun.Dial("test-tunnel")
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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m := transport.Message{
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Header: map[string]string{
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"test": "send",
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},
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}
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// send the message
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if err := c.Send(&m); err != nil {
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t.Fatal(err)
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}
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// now wait for the response
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mr := new(transport.Message)
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if err := c.Recv(mr); err != nil {
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t.Fatal(err)
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}
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<-wait
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if v := mr.Header["test"]; v != "accept" {
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t.Fatalf("Message not received from accepted side. Received: %s", v)
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}
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}
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func TestTunnel(t *testing.T) {
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// create a new tunnel client
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tunA := NewTunnel(
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Address("127.0.0.1:9096"),
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Nodes("127.0.0.1:9097"),
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)
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// create a new tunnel server
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tunB := NewTunnel(
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Address("127.0.0.1:9097"),
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)
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// start tunB
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err := tunB.Connect()
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if err != nil {
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t.Fatal(err)
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}
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defer tunB.Close()
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// start tunA
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err = tunA.Connect()
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if err != nil {
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t.Fatal(err)
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}
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defer tunA.Close()
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wait := make(chan bool)
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var wg sync.WaitGroup
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wg.Add(1)
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// start the listener
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go testAccept(t, tunB, wait, &wg)
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wg.Add(1)
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// start the client
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go testSend(t, tunA, wait, &wg)
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// wait until done
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wg.Wait()
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}
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func TestLoopbackTunnel(t *testing.T) {
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// create a new tunnel
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tun := NewTunnel(
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Address("127.0.0.1:9096"),
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Nodes("127.0.0.1:9096"),
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)
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// start tunnel
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err := tun.Connect()
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if err != nil {
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t.Fatal(err)
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}
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defer tun.Close()
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time.Sleep(500 * time.Millisecond)
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wait := make(chan bool)
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var wg sync.WaitGroup
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wg.Add(1)
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// start the listener
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go testAccept(t, tun, wait, &wg)
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wg.Add(1)
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// start the client
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go testSend(t, tun, wait, &wg)
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// wait until done
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wg.Wait()
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}
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func testBrokenTunAccept(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup) {
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defer wg.Done()
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// listen on some virtual address
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tl, err := tun.Listen("test-tunnel")
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if err != nil {
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t.Fatal(err)
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}
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// receiver ready; notify sender
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wait <- true
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// accept a connection
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c, err := tl.Accept()
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if err != nil {
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t.Fatal(err)
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}
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// accept the message and close the tunnel
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// we do this to simulate loss of network connection
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m := new(transport.Message)
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if err := c.Recv(m); err != nil {
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t.Fatal(err)
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}
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// close all the links
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for _, link := range tun.Links() {
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link.Close()
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}
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// receiver ready; notify sender
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wait <- true
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// accept the message
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m = new(transport.Message)
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if err := c.Recv(m); err != nil {
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t.Fatal(err)
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}
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// notify sender we have received the message
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<-wait
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}
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func testBrokenTunSend(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup) {
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defer wg.Done()
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// wait for the listener to get ready
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<-wait
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// dial a new session
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c, err := tun.Dial("test-tunnel")
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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m := transport.Message{
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Header: map[string]string{
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"test": "send",
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},
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}
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// send the message
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if err := c.Send(&m); err != nil {
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t.Fatal(err)
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}
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// wait for the listener to get ready
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<-wait
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// give it time to reconnect
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time.Sleep(2 * ReconnectTime)
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// send the message
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if err := c.Send(&m); err != nil {
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t.Fatal(err)
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}
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// wait for the listener to receive the message
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// c.Send merely enqueues the message to the link send queue and returns
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// in order to verify it was received we wait for the listener to tell us
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wait <- true
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}
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func TestReconnectTunnel(t *testing.T) {
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// create a new tunnel client
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tunA := NewTunnel(
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Address("127.0.0.1:9096"),
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Nodes("127.0.0.1:9097"),
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)
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// create a new tunnel server
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tunB := NewTunnel(
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Address("127.0.0.1:9097"),
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)
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// start tunnel
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err := tunB.Connect()
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if err != nil {
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t.Fatal(err)
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}
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defer tunB.Close()
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// we manually override the tunnel.ReconnectTime value here
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// this is so that we make the reconnects faster than the default 5s
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ReconnectTime = 200 * time.Millisecond
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// start tunnel
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err = tunA.Connect()
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if err != nil {
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t.Fatal(err)
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}
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defer tunA.Close()
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wait := make(chan bool)
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var wg sync.WaitGroup
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wg.Add(1)
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// start tunnel listener
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go testBrokenTunAccept(t, tunB, wait, &wg)
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wg.Add(1)
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// start tunnel sender
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go testBrokenTunSend(t, tunA, wait, &wg)
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// wait until done
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wg.Wait()
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}
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