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server_test.go
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server_test.go
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package msmtpd
import (
"context"
"crypto/tls"
"fmt"
"net"
"net/smtp"
"sync"
"testing"
"time"
"github.com/vodolaz095/msmtpd/internal"
)
func TestSMTP(t *testing.T) {
addr, closer := RunTestServerWithoutTLS(t, &Server{})
defer closer()
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
if err = c.Hello("localhost"); err != nil {
t.Errorf("HELO failed: %v", err)
}
if supported, _ := c.Extension("AUTH"); supported {
t.Error("AUTH supported before TLS")
}
if supported, _ := c.Extension("8BITMIME"); !supported {
t.Error("8BITMIME not supported")
}
if supported, _ := c.Extension("STARTTLS"); supported {
t.Error("STARTTLS supported")
}
if err = c.Mail("[email protected]"); err != nil {
t.Errorf("Mail failed: %v", err)
}
if err = c.Rcpt("[email protected]"); err != nil {
t.Errorf("Rcpt failed: %v", err)
}
if err = c.Rcpt("[email protected]"); err != nil {
t.Errorf("Rcpt2 failed: %v", err)
}
wc, err := c.Data()
if err != nil {
t.Errorf("Data failed: %v", err)
}
_, err = fmt.Fprintf(wc, internal.MakeTestMessage("[email protected]", "[email protected]", "[email protected]"))
if err != nil {
t.Errorf("Data body failed: %v", err)
}
err = wc.Close()
if err != nil {
t.Errorf("Data close failed: %v", err)
}
err = c.Reset()
if err != nil {
t.Errorf("Reset failed: %v", err)
}
err = c.Verify("[email protected]")
if err == nil {
t.Error("Unexpected support for VRFY")
}
if err = internal.DoCommand(c.Text, 250, "NOOP"); err != nil {
t.Errorf("NOOP failed: %v", err)
}
if err = c.Quit(); err != nil {
t.Errorf("Quit failed: %v", err)
}
}
func TestListenAndServe(t *testing.T) {
server := &Server{}
addr, closer := RunTestServerWithoutTLS(t, server)
closer()
go func() {
lsErr := server.ListenAndServe(addr)
if lsErr != nil {
t.Errorf("%s : while starting server on %s", lsErr, server.Address())
}
}()
time.Sleep(100 * time.Millisecond)
if server.Address().String() != addr {
t.Errorf("server is listening on `%s` instead of `%s",
server.Address(), addr,
)
}
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
if err = c.Quit(); err != nil {
t.Errorf("Quit failed: %v", err)
}
}
func TestMaxConnections(t *testing.T) {
addr, closer := RunTestServerWithoutTLS(t, &Server{
Logger: &TestLogger{Suite: t},
MaxConnections: 1,
})
defer closer()
c1, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
_, err = smtp.Dial(addr)
if err == nil {
t.Error("Dial succeeded despite MaxConnections = 1")
}
c1.Close()
}
func TestNoMaxConnections(t *testing.T) {
addr, closer := RunTestServerWithoutTLS(t, &Server{
Logger: &TestLogger{Suite: t},
MaxConnections: -1,
})
defer closer()
c1, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
c1.Close()
}
func TestTimeoutClose(t *testing.T) {
addr, closer := RunTestServerWithoutTLS(t, &Server{
Logger: &TestLogger{Suite: t},
MaxConnections: 1,
ReadTimeout: time.Second,
WriteTimeout: time.Second,
})
defer closer()
c1, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
time.Sleep(time.Second * 2)
c2, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
if err = c1.Mail("[email protected]"); err == nil {
t.Error("MAIL succeeded despite being timed out.")
}
if err = c2.Mail("[email protected]"); err != nil {
t.Errorf("MAIL failed: %v", err)
}
if err = c2.Quit(); err != nil {
t.Errorf("Quit failed: %v", err)
}
c2.Close()
}
func TestTLSTimeout(t *testing.T) {
addr, closer := RunTestServerWithTLS(t, &Server{
Logger: &TestLogger{Suite: t},
ReadTimeout: time.Second * 2,
WriteTimeout: time.Second * 2,
})
defer closer()
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
if err = c.StartTLS(&tls.Config{InsecureSkipVerify: true}); err != nil {
t.Errorf("STARTTLS failed: %v", err)
}
time.Sleep(time.Second)
if err = c.Mail("[email protected]"); err != nil {
t.Errorf("MAIL failed: %v", err)
}
time.Sleep(time.Second)
if err = c.Rcpt("[email protected]"); err != nil {
t.Errorf("RCPT failed: %v", err)
}
time.Sleep(time.Second)
if err = c.Rcpt("[email protected]"); err != nil {
t.Errorf("RCPT failed: %v", err)
}
time.Sleep(time.Second)
if err = c.Quit(); err != nil {
t.Errorf("Quit failed: %v", err)
}
}
func TestCloseHandlers(t *testing.T) {
wg := sync.WaitGroup{}
var closeHandler1Called bool
var closeHandler2Called bool
addr, closer := RunTestServerWithoutTLS(t, &Server{
Logger: &TestLogger{Suite: t},
ConnectionCheckers: []ConnectionChecker{
func(transaction *Transaction) error {
t.Logf("Giving 2 wg to transaction %s", transaction.ID)
wg.Add(2)
return nil
},
},
CloseHandlers: []CloseHandler{
func(transaction *Transaction) error {
t.Logf("Closing transaction %s by 1st handler", transaction.ID)
closeHandler1Called = true
wg.Done()
return nil
},
func(transaction *Transaction) error {
t.Logf("Closing transaction %s by 2nd handler", transaction.ID)
closeHandler2Called = true
wg.Done()
return fmt.Errorf("who cares")
},
},
})
defer closer()
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("Dial failed: %v", err)
}
err = c.Close()
if err != nil {
t.Errorf("Dial failed: %v", err)
}
wg.Wait()
if !closeHandler1Called {
t.Errorf("close handler 1 is not called")
}
if !closeHandler2Called {
t.Errorf("close handler 2 is not called")
}
}
func TestTLSListener(t *testing.T) {
cert, err := tls.X509KeyPair(internal.LocalhostCert, internal.LocalhostKey)
if err != nil {
t.Errorf("Cert load failed: %v", err)
}
cfg := &tls.Config{
Certificates: []tls.Certificate{cert},
}
ln, err := tls.Listen("tcp", "127.0.0.1:0", cfg)
defer ln.Close()
addr := ln.Addr().String()
server := &Server{
Logger: &TestLogger{Suite: t},
Authenticator: func(tr *Transaction, username, password string) error {
if tr.TLS == nil {
t.Error("didn't correctly set connection state on TLS connection")
}
return nil
},
}
go func() {
server.Serve(ln)
}()
conn, err := tls.Dial("tcp", addr, &tls.Config{InsecureSkipVerify: true})
if err != nil {
t.Errorf("couldn't connect to tls socket: %v", err)
}
c, err := smtp.NewClient(conn, "localhost")
if err != nil {
t.Errorf("couldn't create client: %v", err)
}
if err = c.Hello("localhost"); err != nil {
t.Errorf("HELO failed: %v", err)
}
if err = internal.DoCommand(c.Text, 334, "AUTH PLAIN"); err != nil {
t.Errorf("AUTH didn't work: %v", err)
}
if err = internal.DoCommand(c.Text, 235, "Zm9vAGJhcgBxdXV4"); err != nil {
t.Errorf("AUTH didn't work: %v", err)
}
if err = c.Quit(); err != nil {
t.Errorf("Quit failed: %v", err)
}
}
func TestShutdown(t *testing.T) {
t.Logf("Starting shutdown test")
server := &Server{
Logger: &TestLogger{Suite: t},
}
ln, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Errorf("Listen failed: %v", err)
}
srvres := make(chan error)
go func() {
t.Log("Starting server")
srvres <- server.Serve(ln)
}()
// Connect a client
c, err := smtp.Dial(ln.Addr().String())
if err != nil {
t.Errorf("Dial failed: %v", err)
}
if err = c.Hello("localhost"); err != nil {
t.Errorf("HELO failed: %v", err)
}
// While the client connection is open, shut down the server (without
// waiting for it to finish)
err = server.Shutdown(false)
if err != nil {
t.Errorf("Shutdown returned error: %v", err)
}
// Verify that Shutdown() worked by attempting to connect another client
_, err = smtp.Dial(ln.Addr().String())
if err == nil {
t.Errorf("Dial did not fail as expected")
}
if _, typok := err.(*net.OpError); !typok {
t.Errorf("Dial did not return net.OpError as expected: %v (%T)", err, err)
}
// Wait for shutdown to complete
shutres := make(chan error)
go func() {
t.Log("Waiting for server shutdown to finish")
shutres <- server.Wait()
}()
// Slight delay to ensure Shutdown() blocks
time.Sleep(250 * time.Millisecond)
// Wait() should not have returned yet due to open client conn
select {
case shuterr := <-shutres:
t.Errorf("Wait() returned early w/ error: %v", shuterr)
default:
}
// Now close the client
t.Log("Closing client connection")
if err = c.Quit(); err != nil {
t.Errorf("QUIT failed: %v", err)
}
c.Close()
// Wait for Wait() to return
t.Log("Waiting for Wait() to return")
select {
case shuterr := <-shutres:
if shuterr != nil {
t.Errorf("Wait() returned error: %v", shuterr)
}
case <-time.After(15 * time.Second):
t.Errorf("Timed out waiting for Wait() to return")
}
// Wait for Serve() to return
t.Log("Waiting for Serve() to return")
select {
case srverr := <-srvres:
if srverr != ErrServerClosed {
t.Errorf("Serve() returned error: %v", srverr)
}
case <-time.After(15 * time.Second):
t.Errorf("Timed out waiting for Serve() to return")
}
}
func TestServeFailsIfShutdown(t *testing.T) {
server := &Server{
Logger: &TestLogger{Suite: t},
}
err := server.Shutdown(true)
if err != nil {
t.Errorf("Shutdown() failed: %v", err)
}
err = server.Serve(nil)
if err != ErrServerClosed {
t.Errorf("Serve() did not return ErrServerClosed: %v", err)
}
}
func TestWaitFailsIfNotShutdown(t *testing.T) {
server := &Server{
Logger: &TestLogger{Suite: t},
}
err := server.Wait()
if err == nil {
t.Errorf("Wait() did not fail as expected")
}
}
func TestServerDefaultContext(t *testing.T) {
wg := sync.WaitGroup{}
wg.Add(1)
server := Server{
Logger: &TestLogger{Suite: t},
}
addr, closer := RunTestServerWithoutTLS(t, &server)
defer closer()
go func() {
<-server.Context.Done()
t.Logf("Server context canceled!")
wg.Done()
}()
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("%s : while dialing server", err)
}
server.Cancel()
err = c.Quit()
if err != nil {
t.Errorf("%s : while quiting", err)
}
wg.Wait()
}
func TestServerExternalContext(t *testing.T) {
ctx, cancel := context.WithCancel(context.TODO())
wg := sync.WaitGroup{}
wg.Add(1)
server := Server{
Context: ctx,
Cancel: cancel,
Logger: &TestLogger{Suite: t},
}
addr, closer := RunTestServerWithoutTLS(t, &server)
defer closer()
go func() {
<-ctx.Done()
t.Logf("Server context canceled!")
wg.Done()
}()
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("%s : while dialing server", err)
}
cancel()
err = c.Quit()
if err != nil {
t.Errorf("%s : while quiting", err)
}
wg.Wait()
}
func TestServerContextDoesNotStopTransaction(t *testing.T) {
wg := sync.WaitGroup{}
wg.Add(1)
server := Server{
Logger: &TestLogger{Suite: t},
}
addr, closer := RunTestServerWithoutTLS(t, &server)
defer closer()
go func() {
time.Sleep(100 * time.Millisecond)
<-server.Context.Done()
t.Logf("Server context canceled!")
wg.Done()
}()
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("%s : while dialing server", err)
}
server.Cancel()
err = c.Hello("smtp.yandex.ru")
if err != nil {
t.Errorf("%s : while sending helo", err)
}
err = c.Quit()
if err != nil {
t.Errorf("%s : while quiting", err)
}
wg.Wait()
}
func TestServerContextDoneInTransaction(t *testing.T) {
wg := sync.WaitGroup{}
wg.Add(2)
server := Server{
Logger: &TestLogger{Suite: t},
ConnectionCheckers: []ConnectionChecker{
func(tr *Transaction) error {
go func() {
<-tr.Context().Done()
t.Logf("Context in transaction is canceled!")
wg.Done()
}()
return nil
},
},
}
addr, closer := RunTestServerWithoutTLS(t, &server)
defer closer()
go func() {
<-server.Context.Done()
t.Logf("Server context canceled!")
wg.Done()
}()
c, err := smtp.Dial(addr)
if err != nil {
t.Errorf("%s : while dialing server", err)
}
server.Cancel()
err = c.Hello("smtp.yandex.ru")
if err != nil {
t.Errorf("%s : while sending helo", err)
}
err = c.Quit()
if err != nil {
t.Errorf("%s : while quiting", err)
}
wg.Wait()
}