go-xmpp/component_test.go

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package xmpp
import (
"context"
"encoding/xml"
"errors"
"fmt"
"github.com/google/uuid"
"gosrc.io/xmpp/stanza"
"net"
"strings"
"testing"
"time"
)
// Tests are ran in parallel, so each test creating a server must use a different port so we do not get any
// conflict. Using iota for this should do the trick.
const (
defaultChannelTimeout = 5 * time.Second
)
func TestHandshake(t *testing.T) {
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opts := ComponentOptions{
Domain: "test.localhost",
Secret: "mypass",
}
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c := Component{ComponentOptions: opts}
streamID := "1263952298440005243"
expected := "c77e2ef0109fbbc5161e83b51629cd1353495332"
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result := c.handshake(streamID)
if result != expected {
t.Errorf("incorrect handshake calculation '%s' != '%s'", result, expected)
}
}
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// Tests connection process with a handshake exchange
// Tests multiple session IDs. All connections should generate a unique stream ID
func TestGenerateHandshakeId(t *testing.T) {
// Using this array with a channel to make a queue of values to test
// These are stream IDs that will be used to test the connection process, mixing them with the "secret" to generate
// some handshake value
var uuidsArray = [5]string{}
for i := 1; i < len(uuidsArray); i++ {
id, _ := uuid.NewRandom()
uuidsArray[i] = id.String()
}
// Channel to pass stream IDs as a queue
var uchan = make(chan string, len(uuidsArray))
// Populate test channel
for _, elt := range uuidsArray {
uchan <- elt
}
// Performs a Component connection with a handshake. It expects to have an ID sent its way through the "uchan"
// channel of this file. Otherwise it will hang for ever.
h := func(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
checkOpenStreamHandshakeID(t, c, decoder, <-uchan)
readHandshakeComponent(t, decoder)
fmt.Fprintln(c, "<handshake/>") // That's all the server needs to return (see xep-0114)
return
}
// Init mock server
testComponentAddess := fmt.Sprintf("%s:%d", testComponentDomain, testHandshakePort)
mock := ServerMock{}
mock.Start(t, testComponentAddess, h)
// Init component
opts := ComponentOptions{
TransportConfiguration: TransportConfiguration{
Address: testComponentAddess,
Domain: "localhost",
},
Domain: testComponentDomain,
Secret: "mypass",
Name: "Test Component",
Category: "gateway",
Type: "service",
}
router := NewRouter()
c, err := NewComponent(opts, router, componentDefaultErrorHandler)
if err != nil {
t.Errorf("%+v", err)
}
c.transport, err = NewComponentTransport(c.ComponentOptions.TransportConfiguration)
if err != nil {
t.Errorf("%+v", err)
}
// Try connecting, and storing the resulting streamID in a map.
m := make(map[string]bool)
for _, _ = range uuidsArray {
streamId, _ := c.transport.Connect()
m[c.handshake(streamId)] = true
}
if len(uuidsArray) != len(m) {
t.Errorf("Handshake does not produce a unique id. Expected: %d unique ids, got: %d", len(uuidsArray), len(m))
}
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}
// Test that NewStreamManager can accept a Component.
//
// This validates that Component conforms to StreamClient interface.
func TestStreamManager(t *testing.T) {
NewStreamManager(&Component{}, nil)
}
// Tests that the decoder is properly initialized when connecting a component to a server.
// The decoder is expected to be built after a valid connection
// Based on the xmpp_component example.
func TestDecoder(t *testing.T) {
c, _ := mockComponentConnection(t, testDecoderPort, handlerForComponentHandshakeDefaultID)
if c.transport.GetDecoder() == nil {
t.Errorf("Failed to initialize decoder. Decoder is nil.")
}
}
// Tests sending an IQ to the server, and getting the response
func TestSendIq(t *testing.T) {
done := make(chan struct{})
h := func(t *testing.T, c net.Conn) {
handlerForComponentIQSend(t, c)
done <- struct{}{}
}
//Connecting to a mock server, initialized with given port and handler function
c, m := mockComponentConnection(t, testSendIqPort, h)
ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
disco := iqReq.DiscoInfo()
iqReq.Payload = disco
// Handle a possible error
errChan := make(chan error)
errorHandler := func(err error) {
errChan <- err
}
c.ErrorHandler = errorHandler
var res chan stanza.IQ
res, _ = c.SendIQ(ctx, iqReq)
select {
case <-res:
case err := <-errChan:
t.Errorf(err.Error())
case <-time.After(defaultChannelTimeout):
t.Errorf("Failed to receive response, to sent IQ, from mock server")
}
select {
case <-done:
m.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
}
// Checking that error handling is done properly client side when an invalid IQ is sent and the server responds in kind.
func TestSendIqFail(t *testing.T) {
done := make(chan struct{})
h := func(t *testing.T, c net.Conn) {
handlerForComponentIQSend(t, c)
done <- struct{}{}
}
//Connecting to a mock server, initialized with given port and handler function
c, m := mockComponentConnection(t, testSendIqFailPort, h)
ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
// Removing the id to make the stanza invalid. The IQ constructor makes a random one if none is specified
// so we need to overwrite it.
iqReq.Id = ""
disco := iqReq.DiscoInfo()
iqReq.Payload = disco
errChan := make(chan error)
errorHandler := func(err error) {
errChan <- err
}
c.ErrorHandler = errorHandler
var res chan stanza.IQ
res, _ = c.SendIQ(ctx, iqReq)
select {
case r := <-res: // Do we get an IQ response from the server ?
t.Errorf("We should not be getting an IQ response here : this should fail !")
fmt.Println(r)
case <-errChan: // Do we get a stream error from the server ?
// If we get an error from the server, the test passes.
case <-time.After(defaultChannelTimeout): // Timeout ?
t.Errorf("Failed to receive response, to sent IQ, from mock server")
}
select {
case <-done:
m.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
}
// Tests sending raw xml to the mock server.
// Right now, the server response is not checked and an err is passed in a channel if the test is supposed to err.
// In this test, we use IQs
func TestSendRaw(t *testing.T) {
done := make(chan struct{})
// Handler for the mock server
h := func(t *testing.T, c net.Conn) {
// Completes the connection by exchanging handshakes
handlerForComponentHandshakeDefaultID(t, c)
receiveIq(c, xml.NewDecoder(c))
done <- struct{}{}
}
type testCase struct {
req string
shouldErr bool
}
testRequests := make(map[string]testCase)
// Sending a correct IQ of type get. Not supposed to err
testRequests["Correct IQ"] = testCase{
req: `<iq type="get" id="91bd0bba-012f-4d92-bb17-5fc41e6fe545" from="test1@localhost/mremond-mbp" to="testServer" lang="en"><query xmlns="http://jabber.org/protocol/disco#info"></query></iq>`,
shouldErr: false,
}
// Sending an IQ with a missing ID. Should err
testRequests["IQ with missing ID"] = testCase{
req: `<iq type="get" from="test1@localhost/mremond-mbp" to="testServer" lang="en"><query xmlns="http://jabber.org/protocol/disco#info"></query></iq>`,
shouldErr: true,
}
// A handler for the component.
// In the failing test, the server returns a stream error, which triggers this handler, component side.
errChan := make(chan error)
errHandler := func(err error) {
errChan <- err
}
// Tests for all the IQs
for name, tcase := range testRequests {
t.Run(name, func(st *testing.T) {
//Connecting to a mock server, initialized with given port and handler function
c, m := mockComponentConnection(t, testSendRawPort, h)
c.ErrorHandler = errHandler
// Sending raw xml from test case
err := c.SendRaw(tcase.req)
if err != nil {
t.Errorf("Error sending Raw string")
}
// Just wait a little so the message has time to arrive
select {
// We don't use the default "long" timeout here because waiting it out means passing the test.
case <-time.After(200 * time.Millisecond):
case err = <-errChan:
if err == nil && tcase.shouldErr {
t.Errorf("Failed to get closing stream err")
} else if err != nil && !tcase.shouldErr {
t.Errorf("This test is not supposed to err ! => %s", err.Error())
}
}
c.transport.Close()
select {
case <-done:
m.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
})
}
}
// Tests the Disconnect method for Components
func TestDisconnect(t *testing.T) {
c, m := mockComponentConnection(t, testDisconnectPort, handlerForComponentHandshakeDefaultID)
err := c.transport.Ping()
if err != nil {
t.Errorf("Could not ping but not disconnected yet")
}
c.Disconnect()
err = c.transport.Ping()
if err == nil {
t.Errorf("Did not disconnect properly")
}
m.Stop()
}
// Tests that a streamManager successfully disconnects when a handshake fails between the component and the server.
func TestStreamManagerDisconnect(t *testing.T) {
// Init mock server
testComponentAddress := fmt.Sprintf("%s:%d", testComponentDomain, testSManDisconnectPort)
mock := ServerMock{}
// Handler fails the handshake, which is currently the only option to disconnect completely when using a streamManager
// a failed handshake being a permanent error, except for a "conflict"
mock.Start(t, testComponentAddress, handlerComponentFailedHandshakeDefaultID)
//==================================
// Create Component to connect to it
c := makeBasicComponent(defaultComponentName, testComponentAddress, t)
//========================================
// Connect the new Component to the server
cm := NewStreamManager(c, nil)
errChan := make(chan error)
runSMan := func(errChan chan error) {
errChan <- cm.Run()
}
go runSMan(errChan)
select {
case <-errChan:
case <-time.After(100 * time.Millisecond):
t.Errorf("The component and server seem to still be connected while they should not.")
}
mock.Stop()
}
//=============================================================================
// Basic XMPP Server Mock Handlers.
//===============================
// Init mock server and connection
// Creating a mock server and connecting a Component to it. Initialized with given port and handler function
// The Component and mock are both returned
func mockComponentConnection(t *testing.T, port int, handler func(t *testing.T, c net.Conn)) (*Component, *ServerMock) {
// Init mock server
testComponentAddress := fmt.Sprintf("%s:%d", testComponentDomain, port)
mock := ServerMock{}
mock.Start(t, testComponentAddress, handler)
//==================================
// Create Component to connect to it
c := makeBasicComponent(defaultComponentName, testComponentAddress, t)
//========================================
// Connect the new Component to the server
err := c.Connect()
if err != nil {
t.Errorf("%+v", err)
}
return c, &mock
}
func makeBasicComponent(name string, mockServerAddr string, t *testing.T) *Component {
opts := ComponentOptions{
TransportConfiguration: TransportConfiguration{
Address: mockServerAddr,
Domain: "localhost",
},
Domain: testComponentDomain,
Secret: "mypass",
Name: name,
Category: "gateway",
Type: "service",
}
router := NewRouter()
c, err := NewComponent(opts, router, componentDefaultErrorHandler)
if err != nil {
t.Errorf("%+v", err)
}
c.transport, err = NewComponentTransport(c.ComponentOptions.TransportConfiguration)
if err != nil {
t.Errorf("%+v", err)
}
return c
}
// This really should not be used as is.
// It's just meant to be a placeholder when error handling is not needed at this level
func componentDefaultErrorHandler(err error) {
}
// Sends IQ response to Component request.
// No parsing of the request here. We just check that it's valid, and send the default response.
func handlerForComponentIQSend(t *testing.T, c net.Conn) {
// Completes the connection by exchanging handshakes
handlerForComponentHandshakeDefaultID(t, c)
respondToIQ(t, c)
}
// Used for ID and handshake related tests
func checkOpenStreamHandshakeID(t *testing.T, c net.Conn, decoder *xml.Decoder, streamID string) {
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
for { // TODO clean up. That for loop is not elegant and I prefer bounded recursion.
token, err := decoder.Token()
if err != nil {
t.Errorf("cannot read next token: %s", err)
}
switch elem := token.(type) {
// Wait for first startElement
case xml.StartElement:
if elem.Name.Space != stanza.NSStream || elem.Name.Local != "stream" {
err = errors.New("xmpp: expected <stream> but got <" + elem.Name.Local + "> in " + elem.Name.Space)
return
}
if _, err := fmt.Fprintf(c, serverStreamOpen, "localhost", streamID, stanza.NSComponent, stanza.NSStream); err != nil {
t.Errorf("cannot write server stream open: %s", err)
}
return
}
}
}
func checkOpenStreamHandshakeDefaultID(t *testing.T, c net.Conn, decoder *xml.Decoder) {
checkOpenStreamHandshakeID(t, c, decoder, defaultStreamID)
}
// Performs a Component connection with a handshake. It uses a default ID defined in this file as a constant.
// This handler is supposed to fail by sending a "message" stanza instead of a <handshake/> stanza to finalize the handshake.
func handlerComponentFailedHandshakeDefaultID(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
checkOpenStreamHandshakeDefaultID(t, c, decoder)
readHandshakeComponent(t, decoder)
// Send a message, instead of a "<handshake/>" tag, to fail the handshake process dans disconnect the client.
me := stanza.Message{
Attrs: stanza.Attrs{Type: stanza.MessageTypeChat, From: defaultServerName, To: defaultComponentName, Lang: "en"},
Body: "Fail my handshake.",
}
s, _ := xml.Marshal(me)
fmt.Fprintln(c, string(s))
return
}
// Reads from the connection with the Component. Expects a handshake request, and returns the <handshake/> tag.
func readHandshakeComponent(t *testing.T, decoder *xml.Decoder) {
se, err := stanza.NextStart(decoder)
if err != nil {
t.Errorf("cannot read auth: %s", err)
return
}
nv := &stanza.Handshake{}
// Decode element into pointer storage
if err = decoder.DecodeElement(nv, &se); err != nil {
t.Errorf("cannot decode handshake: %s", err)
return
}
if len(strings.TrimSpace(nv.Value)) == 0 {
t.Errorf("did not receive handshake ID")
}
}
// Performs a Component connection with a handshake. It uses a default ID defined in this file as a constant.
// Used in the mock server as a Handler
func handlerForComponentHandshakeDefaultID(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
checkOpenStreamHandshakeDefaultID(t, c, decoder)
readHandshakeComponent(t, decoder)
fmt.Fprintln(c, "<handshake/>") // That's all the server needs to return (see xep-0114)
return
}