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go-mail/client_test.go
Winni Neessen adcb8ac41d
Fix connection handling and improve thread-safety in SMTP client 
Reset connections to nil after Close, add RLock in HasConnection, and refine Close logic to handle already closed connections gracefully. Enhanced DialWithContext documentation and added tests for double-close scenarios to ensure robustness.
2024-10-04 23:15:01 +02:00

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// SPDX-FileCopyrightText: 2022-2023 The go-mail Authors
//
// SPDX-License-Identifier: MIT
package mail
import (
"bufio"
"context"
"crypto/tls"
"errors"
"fmt"
"io"
"net"
"os"
"strconv"
"strings"
"sync"
"testing"
"time"
"github.com/wneessen/go-mail/log"
"github.com/wneessen/go-mail/smtp"
)
const (
// DefaultHost is used as default hostname for the Client
DefaultHost = "localhost"
// TestRcpt is a trash mail address to send test mails to
TestRcpt = "couttifaddebro-1473@yopmail.com"
// TestServerProto is the protocol used for the simple SMTP test server
TestServerProto = "tcp"
// TestServerAddr is the address the simple SMTP test server listens on
TestServerAddr = "127.0.0.1"
// TestServerPortBase is the base port for the simple SMTP test server
TestServerPortBase = 2025
)
// TestNewClient tests the NewClient() method with its default options
func TestNewClient(t *testing.T) {
host := "mail.example.com"
tests := []struct {
name string
host string
shouldfail bool
}{
{"Default", "mail.example.com", false},
{"Empty host should fail", "", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(tt.host)
if err != nil && !tt.shouldfail {
t.Errorf("failed to create new client: %s", err)
return
}
if c.host != tt.host {
t.Errorf("failed to create new client. Host expected: %s, got: %s", host, c.host)
}
if c.connTimeout != DefaultTimeout {
t.Errorf("failed to create new client. Timeout expected: %s, got: %s", DefaultTimeout.String(),
c.connTimeout.String())
}
if c.port != DefaultPort {
t.Errorf("failed to create new client. Port expected: %d, got: %d", DefaultPort, c.port)
}
if c.tlspolicy != TLSMandatory {
t.Errorf("failed to create new client. TLS policy expected: %d, got: %d", TLSMandatory, c.tlspolicy)
}
if c.tlsconfig.ServerName != tt.host {
t.Errorf("failed to create new client. TLS config host expected: %s, got: %s",
host, c.tlsconfig.ServerName)
}
if c.tlsconfig.MinVersion != DefaultTLSMinVersion {
t.Errorf("failed to create new client. TLS config min versino expected: %d, got: %d",
DefaultTLSMinVersion, c.tlsconfig.MinVersion)
}
if c.ServerAddr() != fmt.Sprintf("%s:%d", tt.host, c.port) {
t.Errorf("failed to create new client. c.ServerAddr() expected: %s, got: %s",
fmt.Sprintf("%s:%d", tt.host, c.port), c.ServerAddr())
}
})
}
}
// TestNewClient tests the NewClient() method with its custom options
func TestNewClientWithOptions(t *testing.T) {
host := "mail.example.com"
tests := []struct {
name string
option Option
shouldfail bool
}{
{"nil option", nil, true},
{"WithPort()", WithPort(465), false},
{"WithPort(); port is too high", WithPort(100000), true},
{"WithTimeout()", WithTimeout(time.Second * 5), false},
{"WithTimeout()", WithTimeout(-10), true},
{"WithSSL()", WithSSL(), false},
{"WithSSLPort(false)", WithSSLPort(false), false},
{"WithSSLPort(true)", WithSSLPort(true), false},
{"WithHELO()", WithHELO(host), false},
{"WithHELO(); helo is empty", WithHELO(""), true},
{"WithTLSPolicy()", WithTLSPolicy(TLSOpportunistic), false},
{"WithTLSPortPolicy()", WithTLSPortPolicy(TLSOpportunistic), false},
{"WithTLSConfig()", WithTLSConfig(&tls.Config{}), false},
{"WithTLSConfig(); config is nil", WithTLSConfig(nil), true},
{"WithSMTPAuth(NoAuth)", WithSMTPAuth(SMTPAuthNoAuth), false},
{"WithSMTPAuth()", WithSMTPAuth(SMTPAuthLogin), false},
{
"WithSMTPAuthCustom()",
WithSMTPAuthCustom(smtp.PlainAuth("", "", "", "")),
false,
},
{"WithUsername()", WithUsername("test"), false},
{"WithPassword()", WithPassword("test"), false},
{"WithDSN()", WithDSN(), false},
{"WithDSNMailReturnType()", WithDSNMailReturnType(DSNMailReturnFull), false},
{"WithDSNMailReturnType() wrong option", WithDSNMailReturnType("FAIL"), true},
{"WithDSNRcptNotifyType()", WithDSNRcptNotifyType(DSNRcptNotifySuccess), false},
{"WithDSNRcptNotifyType() wrong option", WithDSNRcptNotifyType("FAIL"), true},
{"WithoutNoop()", WithoutNoop(), false},
{"WithDebugLog()", WithDebugLog(), false},
{"WithLogger()", WithLogger(log.New(os.Stderr, log.LevelDebug)), false},
{"WithDialContextFunc()", WithDialContextFunc(func(ctx context.Context, network, address string) (net.Conn, error) {
return nil, nil
}), false},
{
"WithDSNRcptNotifyType() NEVER combination",
WithDSNRcptNotifyType(DSNRcptNotifySuccess, DSNRcptNotifyNever), true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, tt.option, nil)
if err != nil && !tt.shouldfail {
t.Errorf("failed to create new client: %s", err)
return
}
_ = c
})
}
}
// TestWithHELO tests the WithHELO() option for the NewClient() method
func TestWithHELO(t *testing.T) {
tests := []struct {
name string
value string
want string
}{
{"HELO test.de", "test.de", "test.de"},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithHELO(tt.value))
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
if c.helo != tt.want {
t.Errorf("failed to set custom HELO. Want: %s, got: %s", tt.want, c.helo)
}
})
}
}
// TestWithPort tests the WithPort() option for the NewClient() method
func TestWithPort(t *testing.T) {
tests := []struct {
name string
value int
want int
sf bool
}{
{"set port to 25", 25, 25, false},
{"set port to 465", 465, 465, false},
{"set port to 100000", 100000, 25, true},
{"set port to -10", -10, 25, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithPort(tt.value))
if err != nil && !tt.sf {
t.Errorf("failed to create new client: %s", err)
return
}
if c.port != tt.want {
t.Errorf("failed to set custom port. Want: %d, got: %d", tt.want, c.port)
}
})
}
}
// TestWithTimeout tests the WithTimeout() option for the NewClient() method
func TestWithTimeout(t *testing.T) {
tests := []struct {
name string
value time.Duration
want time.Duration
sf bool
}{
{"set timeout to 5s", time.Second * 5, time.Second * 5, false},
{"set timeout to 30s", time.Second * 30, time.Second * 30, false},
{"set timeout to 1m", time.Minute, time.Minute, false},
{"set timeout to 0", 0, DefaultTimeout, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithTimeout(tt.value))
if err != nil && !tt.sf {
t.Errorf("failed to create new client: %s", err)
return
}
if c.connTimeout != tt.want {
t.Errorf("failed to set custom timeout. Want: %d, got: %d", tt.want, c.connTimeout)
}
})
}
}
// TestWithTLSPolicy tests the WithTLSPolicy() option for the NewClient() method
func TestWithTLSPolicy(t *testing.T) {
tests := []struct {
name string
value TLSPolicy
want string
sf bool
}{
{"Policy: TLSMandatory", TLSMandatory, TLSMandatory.String(), false},
{"Policy: TLSOpportunistic", TLSOpportunistic, TLSOpportunistic.String(), false},
{"Policy: NoTLS", NoTLS, NoTLS.String(), false},
{"Policy: Invalid", -1, "UnknownPolicy", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithTLSPolicy(tt.value))
if err != nil && !tt.sf {
t.Errorf("failed to create new client: %s", err)
return
}
if c.tlspolicy.String() != tt.want {
t.Errorf("failed to set TLSPolicy. Want: %s, got: %s", tt.want, c.tlspolicy)
}
})
}
}
// TestWithTLSPortPolicy tests the WithTLSPortPolicy() option for the NewClient() method
func TestWithTLSPortPolicy(t *testing.T) {
tests := []struct {
name string
value TLSPolicy
want string
wantPort int
fbPort int
sf bool
}{
{"Policy: TLSMandatory", TLSMandatory, TLSMandatory.String(), 587, 0, false},
{"Policy: TLSOpportunistic", TLSOpportunistic, TLSOpportunistic.String(), 587, 25, false},
{"Policy: NoTLS", NoTLS, NoTLS.String(), 25, 0, false},
{"Policy: Invalid", -1, "UnknownPolicy", 587, 0, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithTLSPortPolicy(tt.value))
if err != nil && !tt.sf {
t.Errorf("failed to create new client: %s", err)
return
}
if c.tlspolicy.String() != tt.want {
t.Errorf("failed to set TLSPortPolicy. Want: %s, got: %s", tt.want, c.tlspolicy)
}
if c.port != tt.wantPort {
t.Errorf("failed to set TLSPortPolicy, wanted port: %d, got: %d", tt.wantPort, c.port)
}
if c.fallbackPort != tt.fbPort {
t.Errorf("failed to set TLSPortPolicy, wanted fallbakc port: %d, got: %d", tt.fbPort,
c.fallbackPort)
}
})
}
}
// TestSetTLSPolicy tests the SetTLSPolicy() method for the Client object
func TestSetTLSPolicy(t *testing.T) {
tests := []struct {
name string
value TLSPolicy
want string
sf bool
}{
{"Policy: TLSMandatory", TLSMandatory, TLSMandatory.String(), false},
{"Policy: TLSOpportunistic", TLSOpportunistic, TLSOpportunistic.String(), false},
{"Policy: NoTLS", NoTLS, NoTLS.String(), false},
{"Policy: Invalid", -1, "UnknownPolicy", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithTLSPolicy(NoTLS))
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
c.SetTLSPolicy(tt.value)
if c.tlspolicy.String() != tt.want {
t.Errorf("failed to set TLSPolicy. Want: %s, got: %s", tt.want, c.tlspolicy)
}
})
}
}
// TestSetTLSConfig tests the SetTLSConfig() method for the Client object
func TestSetTLSConfig(t *testing.T) {
tests := []struct {
name string
value *tls.Config
sf bool
}{
{"default config", &tls.Config{}, false},
{"nil config", nil, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
if err := c.SetTLSConfig(tt.value); err != nil && !tt.sf {
t.Errorf("failed to set TLSConfig: %s", err)
return
}
})
}
}
// TestSetSSL tests the SetSSL() method for the Client object
func TestSetSSL(t *testing.T) {
tests := []struct {
name string
value bool
}{
{"SSL: on", true},
{"SSL: off", false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
c.SetSSL(tt.value)
if c.useSSL != tt.value {
t.Errorf("failed to set SSL setting. Got: %t, want: %t", c.useSSL, tt.value)
}
})
}
}
// TestSetSSLPort tests the Client.SetSSLPort method
func TestClient_SetSSLPort(t *testing.T) {
tests := []struct {
name string
value bool
fb bool
port int
fbPort int
}{
{"SSL: on, fb: off", true, false, 465, 0},
{"SSL: on, fb: on", true, true, 465, 25},
{"SSL: off, fb: off", false, false, 25, 0},
{"SSL: off, fb: on", false, true, 25, 25},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
c.SetSSLPort(tt.value, tt.fb)
if c.useSSL != tt.value {
t.Errorf("failed to set SSL setting. Got: %t, want: %t", c.useSSL, tt.value)
}
if c.port != tt.port {
t.Errorf("failed to set SSLPort, wanted port: %d, got: %d", c.port, tt.port)
}
if c.fallbackPort != tt.fbPort {
t.Errorf("failed to set SSLPort, wanted fallback port: %d, got: %d", c.fallbackPort,
tt.fbPort)
}
})
}
}
// TestSetUsername tests the SetUsername method for the Client object
func TestSetUsername(t *testing.T) {
tests := []struct {
name string
value string
want string
sf bool
}{
{"normal username", "testuser", "testuser", false},
{"empty username", "", "", false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
c.SetUsername(tt.value)
if c.user != tt.want {
t.Errorf("failed to set username. Expected %s, got: %s", tt.want, c.user)
}
})
}
}
// TestSetPassword tests the SetPassword method for the Client object
func TestSetPassword(t *testing.T) {
tests := []struct {
name string
value string
want string
sf bool
}{
{"normal password", "testpass", "testpass", false},
{"empty password", "", "", false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
c.SetPassword(tt.value)
if c.pass != tt.want {
t.Errorf("failed to set password. Expected %s, got: %s", tt.want, c.pass)
}
})
}
}
// TestSetSMTPAuth tests the SetSMTPAuth method for the Client object
func TestSetSMTPAuth(t *testing.T) {
tests := []struct {
name string
value SMTPAuthType
want string
sf bool
}{
{"SMTPAuth: LOGIN", SMTPAuthLogin, "LOGIN", false},
{"SMTPAuth: PLAIN", SMTPAuthPlain, "PLAIN", false},
{"SMTPAuth: CRAM-MD5", SMTPAuthCramMD5, "CRAM-MD5", false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
c.SetSMTPAuth(tt.value)
if string(c.smtpAuthType) != tt.want {
t.Errorf("failed to set SMTP auth type. Expected %s, got: %s", tt.want, string(c.smtpAuthType))
}
})
}
}
// TestWithDSN tests the WithDSN method for the Client object
func TestWithDSN(t *testing.T) {
c, err := NewClient(DefaultHost, WithDSN())
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
if !c.requestDSN {
t.Errorf("WithDSN failed. c.requestDSN expected to be: %t, got: %t", true, c.requestDSN)
}
if c.dsnReturnType != DSNMailReturnFull {
t.Errorf("WithDSN failed. c.dsnReturnType expected to be: %s, got: %s", DSNMailReturnFull,
c.dsnReturnType)
}
if c.dsnRcptNotifyType[0] != string(DSNRcptNotifyFailure) {
t.Errorf("WithDSN failed. c.dsnRcptNotifyType[0] expected to be: %s, got: %s", DSNRcptNotifyFailure,
c.dsnRcptNotifyType[0])
}
if c.dsnRcptNotifyType[1] != string(DSNRcptNotifySuccess) {
t.Errorf("WithDSN failed. c.dsnRcptNotifyType[1] expected to be: %s, got: %s", DSNRcptNotifySuccess,
c.dsnRcptNotifyType[1])
}
}
// TestWithDSNMailReturnType tests the WithDSNMailReturnType method for the Client object
func TestWithDSNMailReturnType(t *testing.T) {
tests := []struct {
name string
value DSNMailReturnOption
want string
sf bool
}{
{"WithDSNMailReturnType: FULL", DSNMailReturnFull, "FULL", false},
{"WithDSNMailReturnType: HDRS", DSNMailReturnHeadersOnly, "HDRS", false},
{"WithDSNMailReturnType: INVALID", "INVALID", "", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithDSNMailReturnType(tt.value))
if err != nil && !tt.sf {
t.Errorf("failed to create new client: %s", err)
return
}
if string(c.dsnReturnType) != tt.want {
t.Errorf("WithDSNMailReturnType failed. Expected %s, got: %s", tt.want, string(c.dsnReturnType))
}
})
}
}
// TestWithDSNRcptNotifyType tests the WithDSNRcptNotifyType method for the Client object
func TestWithDSNRcptNotifyType(t *testing.T) {
tests := []struct {
name string
value DSNRcptNotifyOption
want string
sf bool
}{
{"WithDSNRcptNotifyType: NEVER", DSNRcptNotifyNever, "NEVER", false},
{"WithDSNRcptNotifyType: SUCCESS", DSNRcptNotifySuccess, "SUCCESS", false},
{"WithDSNRcptNotifyType: FAILURE", DSNRcptNotifyFailure, "FAILURE", false},
{"WithDSNRcptNotifyType: DELAY", DSNRcptNotifyDelay, "DELAY", false},
{"WithDSNRcptNotifyType: INVALID", "INVALID", "", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost, WithDSNRcptNotifyType(tt.value))
if err != nil && !tt.sf {
t.Errorf("failed to create new client: %s", err)
return
}
if len(c.dsnRcptNotifyType) <= 0 && !tt.sf {
t.Errorf("WithDSNRcptNotifyType failed. Expected at least one DSNRNType but got none")
}
if !tt.sf && c.dsnRcptNotifyType[0] != tt.want {
t.Errorf("WithDSNRcptNotifyType failed. Expected %s, got: %s", tt.want, c.dsnRcptNotifyType[0])
}
})
}
}
// TestWithoutNoop tests the WithoutNoop method for the Client object
func TestWithoutNoop(t *testing.T) {
c, err := NewClient(DefaultHost, WithoutNoop())
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
if !c.noNoop {
t.Errorf("WithoutNoop failed. c.noNoop expected to be: %t, got: %t", true, c.noNoop)
}
c, err = NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
if c.noNoop {
t.Errorf("WithoutNoop failed. c.noNoop expected to be: %t, got: %t", false, c.noNoop)
}
}
// TestSetSMTPAuthCustom tests the SetSMTPAuthCustom method for the Client object
func TestSetSMTPAuthCustom(t *testing.T) {
tests := []struct {
name string
value smtp.Auth
want string
sf bool
}{
{"SMTPAuth: CRAM-MD5", smtp.CRAMMD5Auth("", ""), "CRAM-MD5", false},
{"SMTPAuth: LOGIN", smtp.LoginAuth("", "", ""), "LOGIN", false},
{"SMTPAuth: PLAIN", smtp.PlainAuth("", "", "", ""), "PLAIN", false},
}
si := smtp.ServerInfo{TLS: true}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := NewClient(DefaultHost)
if err != nil {
t.Errorf("failed to create new client: %s", err)
return
}
c.SetSMTPAuthCustom(tt.value)
if c.smtpAuth == nil {
t.Errorf("failed to set custom SMTP auth method. SMTP Auth method is empty")
}
if c.smtpAuthType != SMTPAuthCustom {
t.Errorf("failed to set custom SMTP auth method. SMTP Auth type is not custom: %s",
c.smtpAuthType)
}
p, _, err := c.smtpAuth.Start(&si)
if err != nil {
t.Errorf("SMTP Auth Start() method returned error: %s", err)
}
if p != tt.want {
t.Errorf("SMTP Auth Start() method is returned proto: %s, expected: %s", p, tt.want)
}
})
}
}
// TestClient_Close_double tests if a close on an already closed connection causes an error.
func TestClient_Close_double(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx := context.Background()
if err = c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
return
}
if !c.smtpClient.HasConnection() {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if err = c.Close(); err != nil {
t.Errorf("failed to close connection: %s", err)
}
if err = c.Close(); err != nil {
t.Errorf("failed 2nd close connection: %s", err)
}
}
// TestClient_DialWithContext tests the DialWithContext method for the Client object
func TestClient_DialWithContext(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx := context.Background()
if err = c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
return
}
if !c.smtpClient.HasConnection() {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if err := c.Close(); err != nil {
t.Errorf("failed to close connection: %s", err)
}
}
// TestClient_DialWithContext_Fallback tests the Client.DialWithContext method with the fallback
// port functionality
func TestClient_DialWithContext_Fallback(t *testing.T) {
c, err := getTestConnectionNoTestPort(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
c.SetTLSPortPolicy(TLSOpportunistic)
c.port = 999
ctx := context.Background()
if err = c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
return
}
if !c.smtpClient.HasConnection() {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if err = c.Close(); err != nil {
t.Errorf("failed to close connection: %s", err)
}
c.port = 999
c.fallbackPort = 999
if err = c.DialWithContext(ctx); err == nil {
t.Error("dial with context was supposed to fail, but didn't")
return
}
}
// TestClient_DialWithContext_Debug tests the DialWithContext method for the Client object with debug
// logging enabled on the SMTP client
func TestClient_DialWithContext_Debug(t *testing.T) {
c, err := getTestClient(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx := context.Background()
if err = c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
return
}
if !c.smtpClient.HasConnection() {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
c.SetDebugLog(true)
if err = c.Close(); err != nil {
t.Errorf("failed to close connection: %s", err)
}
}
// TestClient_DialWithContext_Debug_custom tests the DialWithContext method for the Client
// object with debug logging enabled and a custom logger on the SMTP client
func TestClient_DialWithContext_Debug_custom(t *testing.T) {
c, err := getTestClient(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx := context.Background()
if err = c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
return
}
if !c.smtpClient.HasConnection() {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
c.SetDebugLog(true)
c.SetLogger(log.New(os.Stderr, log.LevelDebug))
if err = c.Close(); err != nil {
t.Errorf("failed to close connection: %s", err)
}
}
// TestClient_DialWithContextInvalidHost tests the DialWithContext method with intentional breaking
// for the Client object
func TestClient_DialWithContextInvalidHost(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
c.host = "invalid.addr"
ctx := context.Background()
if err = c.DialWithContext(ctx); err == nil {
t.Errorf("dial succeeded but was supposed to fail")
return
}
}
// TestClient_DialWithContextInvalidHELO tests the DialWithContext method with intentional breaking
// for the Client object
func TestClient_DialWithContextInvalidHELO(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
c.helo = ""
ctx := context.Background()
if err = c.DialWithContext(ctx); err == nil {
t.Errorf("dial succeeded but was supposed to fail")
return
}
}
// TestClient_DialWithContextInvalidAuth tests the DialWithContext method with intentional breaking
// for the Client object
func TestClient_DialWithContextInvalidAuth(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
c.user = "invalid"
c.pass = "invalid"
c.SetSMTPAuthCustom(smtp.LoginAuth("invalid", "invalid", "invalid"))
ctx := context.Background()
if err = c.DialWithContext(ctx); err == nil {
t.Errorf("dial succeeded but was supposed to fail")
return
}
}
// TestClient_checkConn tests the checkConn method with intentional breaking for the Client object
func TestClient_checkConn(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
if err = c.checkConn(); err == nil {
t.Errorf("connCheck() should fail but succeeded")
}
}
// TestClient_DiealWithContextOptions tests the DialWithContext method plus different options
// for the Client object
func TestClient_DialWithContextOptions(t *testing.T) {
tests := []struct {
name string
wantssl bool
wanttls TLSPolicy
sf bool
}{
{"Want SSL (should fail)", true, NoTLS, true},
{"Want Mandatory TLS", false, TLSMandatory, false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
if tt.wantssl {
c.SetSSL(true)
}
if tt.wanttls != NoTLS {
c.SetTLSPolicy(tt.wanttls)
}
ctx := context.Background()
if err = c.DialWithContext(ctx); err != nil && !tt.sf {
t.Errorf("failed to dial with context: %s", err)
return
}
if !tt.sf {
if c.smtpClient == nil && !tt.sf {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
return
}
if !c.smtpClient.HasConnection() && !tt.sf {
t.Errorf("DialWithContext didn't fail but no connection found.")
return
}
if err = c.Reset(); err != nil {
t.Errorf("failed to reset connection: %s", err)
}
if err = c.Close(); err != nil {
t.Errorf("failed to close connection: %s", err)
}
}
})
}
}
// TestClient_DialWithContextOptionDialContextFunc tests the DialWithContext method plus
// use dialContextFunc option for the Client object
func TestClient_DialWithContextOptionDialContextFunc(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
called := false
c.dialContextFunc = func(ctx context.Context, network, address string) (net.Conn, error) {
called = true
return (&net.Dialer{}).DialContext(ctx, network, address)
}
ctx := context.Background()
if err := c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial with context: %s", err)
return
}
if called == false {
t.Errorf("dialContextFunc supposed to be called but not called")
}
}
// TestClient_DialSendClose tests the Dial(), Send() and Close() method of Client
func TestClient_DialSendClose(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
m := NewMsg()
_ = m.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM"))
_ = m.To(TestRcpt)
m.Subject(fmt.Sprintf("This is a test mail from go-mail/v%s", VERSION))
m.SetBulk()
m.SetDate()
m.SetMessageID()
m.SetBodyString(TypeTextPlain, "This is a test mail from the go-mail library")
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), time.Second*10)
defer cfn()
if err := c.DialWithContext(ctx); err != nil {
t.Errorf("Dial() failed: %s", err)
}
if err := c.Send(m); err != nil {
t.Errorf("Send() failed: %s", err)
}
if err := c.Close(); err != nil {
t.Errorf("Close() failed: %s", err)
}
if !m.IsDelivered() {
t.Errorf("message should be delivered but is indicated no to")
}
}
// TestClient_DialAndSendWithContext tests the DialAndSendWithContext() method of Client
func TestClient_DialAndSendWithContext(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
m := NewMsg()
_ = m.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM"))
_ = m.To(TestRcpt)
m.Subject(fmt.Sprintf("This is a test mail from go-mail/v%s", VERSION))
m.SetBulk()
m.SetDate()
m.SetMessageID()
m.SetBodyString(TypeTextPlain, "This is a test mail from the go-mail library")
tests := []struct {
name string
to time.Duration
sf bool
}{
{"Timeout: 100s", time.Second * 100, false},
{"Timeout: 100ms", time.Millisecond * 100, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), tt.to)
defer cfn()
if err := c.DialAndSendWithContext(ctx, m); err != nil && !tt.sf {
t.Errorf("DialAndSendWithContext() failed: %s", err)
}
})
}
}
// TestClient_DialAndSend tests the DialAndSend() method of Client
func TestClient_DialAndSend(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
m := NewMsg()
_ = m.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM"))
_ = m.To(TestRcpt)
m.Subject(fmt.Sprintf("This is a test mail from go-mail/v%s", VERSION))
m.SetBulk()
m.SetDate()
m.SetMessageID()
m.SetBodyString(TypeTextPlain, "This is a test mail from the go-mail library")
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
if err := c.DialAndSend(m); err != nil {
t.Errorf("DialAndSend() failed: %s", err)
}
}
// TestClient_DialAndSendWithDSN tests the DialAndSend() method of Client with DSN enabled
func TestClient_DialAndSendWithDSN(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
m := NewMsg()
_ = m.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM"))
_ = m.To(TestRcpt)
m.Subject(fmt.Sprintf("This is a test mail from go-mail/v%s", VERSION))
m.SetBulk()
m.SetDate()
m.SetMessageID()
m.SetBodyString(TypeTextPlain, "This is a test mail from the go-mail library")
c, err := getTestConnectionWithDSN(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
if err := c.DialAndSend(m); err != nil {
t.Errorf("DialAndSend() failed: %s", err)
}
}
// TestClient_DialSendCloseBroken tests the Dial(), Send() and Close() method of Client with broken settings
func TestClient_DialSendCloseBroken(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
tests := []struct {
name string
from string
to string
closestart bool
closeearly bool
sf bool
}{
{"Invalid FROM", "foo@foo", TestRcpt, false, false, true},
{"Invalid TO", os.Getenv("TEST_FROM"), "foo@foo", false, false, true},
{"No FROM", "", TestRcpt, false, false, true},
{"No TO", os.Getenv("TEST_FROM"), "", false, false, true},
{"Close early", os.Getenv("TEST_FROM"), TestRcpt, false, true, true},
{"Close start", os.Getenv("TEST_FROM"), TestRcpt, true, false, true},
{"Close start/early", os.Getenv("TEST_FROM"), TestRcpt, true, true, true},
}
m := NewMsg(WithEncoding(NoEncoding))
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
m.SetAddrHeaderIgnoreInvalid(HeaderFrom, tt.from)
m.SetAddrHeaderIgnoreInvalid(HeaderTo, tt.to)
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), time.Second*10)
defer cfn()
if err := c.DialWithContext(ctx); err != nil && !tt.sf {
t.Errorf("Dail() failed: %s", err)
return
}
if tt.closestart {
_ = c.smtpClient.Close()
}
if err = c.Send(m); err != nil && !tt.sf {
t.Errorf("Send() failed: %s", err)
return
}
if tt.closeearly {
_ = c.smtpClient.Close()
}
if err = c.Close(); err != nil && !tt.sf {
t.Errorf("Close() failed: %s", err)
return
}
})
}
}
// TestClient_DialSendCloseBrokenWithDSN tests the Dial(), Send() and Close() method of Client with
// broken settings and DSN enabled
func TestClient_DialSendCloseBrokenWithDSN(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
tests := []struct {
name string
from string
to string
closestart bool
closeearly bool
sf bool
}{
{"Invalid FROM", "foo@foo", TestRcpt, false, false, true},
{"Invalid TO", os.Getenv("TEST_FROM"), "foo@foo", false, false, true},
{"No FROM", "", TestRcpt, false, false, true},
{"No TO", os.Getenv("TEST_FROM"), "", false, false, true},
{"Close early", os.Getenv("TEST_FROM"), TestRcpt, false, true, true},
{"Close start", os.Getenv("TEST_FROM"), TestRcpt, true, false, true},
{"Close start/early", os.Getenv("TEST_FROM"), TestRcpt, true, true, true},
}
m := NewMsg(WithEncoding(NoEncoding))
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
m.SetAddrHeaderIgnoreInvalid(HeaderFrom, tt.from)
m.SetAddrHeaderIgnoreInvalid(HeaderTo, tt.to)
c, err := getTestConnectionWithDSN(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), time.Second*10)
defer cfn()
if err := c.DialWithContext(ctx); err != nil && !tt.sf {
t.Errorf("Dail() failed: %s", err)
return
}
if tt.closestart {
_ = c.smtpClient.Close()
}
if err = c.Send(m); err != nil && !tt.sf {
t.Errorf("Send() failed: %s", err)
return
}
if tt.closeearly {
_ = c.smtpClient.Close()
}
if err = c.Close(); err != nil && !tt.sf {
t.Errorf("Close() failed: %s", err)
return
}
})
}
}
// TestClient_Send_withBrokenRecipient tests the Send() method of Client with a broken and a working recipient
func TestClient_Send_withBrokenRecipient(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
var msgs []*Msg
rcpts := []string{"invalid@domain.tld", TestRcpt, "invalid@address.invalid"}
for _, rcpt := range rcpts {
m := NewMsg()
_ = m.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM"))
_ = m.To(rcpt)
m.Subject(fmt.Sprintf("This is a test mail from go-mail/v%s", VERSION))
m.SetBulk()
m.SetDate()
m.SetMessageID()
m.SetBodyString(TypeTextPlain, "This is a test mail from the go-mail library")
msgs = append(msgs, m)
}
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), DefaultTimeout)
defer cfn()
if err := c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial to sending server: %s", err)
}
if err := c.Send(msgs...); err != nil {
if !strings.Contains(err.Error(), "invalid@domain.tld") ||
!strings.Contains(err.Error(), "invalid@address.invalid") {
t.Errorf("sending mails to invalid addresses was supposed to fail but didn't")
}
if strings.Contains(err.Error(), TestRcpt) {
t.Errorf("sending mail to valid addresses failed: %s", err)
}
}
if err := c.Close(); err != nil {
t.Errorf("failed to close client connection: %s", err)
}
}
// TestClient_auth tests the Dial(), Send() and Close() method of Client with broken settings
func TestClient_auth(t *testing.T) {
tests := []struct {
name string
auth SMTPAuthType
sf bool
}{
{"SMTP AUTH: PLAIN", SMTPAuthPlain, false},
{"SMTP AUTH: LOGIN", SMTPAuthLogin, false},
{"SMTP AUTH: CRAM-MD5", SMTPAuthCramMD5, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := getTestConnection(false)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), time.Second*5)
defer cfn()
if err := c.DialWithContext(ctx); err != nil {
t.Errorf("auth() failed: could not Dial() => %s", err)
return
}
c.SetSMTPAuth(tt.auth)
c.SetUsername(os.Getenv("TEST_SMTPAUTH_USER"))
c.SetPassword(os.Getenv("TEST_SMTPAUTH_PASS"))
if err := c.auth(); err != nil && !tt.sf {
t.Errorf("auth() failed: %s", err)
}
if err := c.Close(); err != nil {
t.Errorf("auth() failed: could not Close() => %s", err)
}
})
}
}
// TestClient_Send_MsgSendError tests the Client.Send method with a broken recipient and verifies
// that the SendError type works properly
func TestClient_Send_MsgSendError(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
var msgs []*Msg
rcpts := []string{"invalid@domain.tld", "invalid@address.invalid"}
for _, rcpt := range rcpts {
m := NewMsg()
_ = m.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM"))
_ = m.To(rcpt)
m.Subject(fmt.Sprintf("This is a test mail from go-mail/v%s", VERSION))
m.SetBulk()
m.SetDate()
m.SetMessageID()
m.SetBodyString(TypeTextPlain, "This is a test mail from the go-mail library")
msgs = append(msgs, m)
}
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), DefaultTimeout)
defer cfn()
if err := c.DialWithContext(ctx); err != nil {
t.Errorf("failed to dial to sending server: %s", err)
}
if err := c.Send(msgs...); err == nil {
t.Errorf("sending messages with broken recipients was supposed to fail but didn't")
}
if err := c.Close(); err != nil {
t.Errorf("failed to close client connection: %s", err)
}
for _, m := range msgs {
if !m.HasSendError() {
t.Errorf("message was expected to have a send error, but didn't")
}
se := &SendError{Reason: ErrSMTPRcptTo}
if !errors.Is(m.SendError(), se) {
t.Errorf("error mismatch, expected: %s, got: %s", se, m.SendError())
}
if m.SendErrorIsTemp() {
t.Errorf("message was not expected to be a temporary error, but reported as such")
}
}
}
// TestClient_DialAndSendWithContext_withSendError tests the Client.DialAndSendWithContext method
// with a broken recipient to make sure that the returned error satisfies the Msg.SendError type
func TestClient_DialAndSendWithContext_withSendError(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
m := NewMsg()
_ = m.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM"))
_ = m.To("invalid@domain.tld")
m.Subject(fmt.Sprintf("This is a test mail from go-mail/v%s", VERSION))
m.SetBulk()
m.SetDate()
m.SetMessageID()
m.SetBodyString(TypeTextPlain, "This is a test mail from the go-mail library")
c, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
ctx, cfn := context.WithTimeout(context.Background(), DefaultTimeout)
defer cfn()
err = c.DialAndSendWithContext(ctx, m)
if err == nil {
t.Errorf("expected DialAndSendWithContext with broken mail recipient to fail, but didn't")
return
}
var se *SendError
if !errors.As(err, &se) {
t.Errorf("expected *SendError type as returned error, but didn't")
return
}
if se.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if m.IsDelivered() {
t.Errorf("message is indicated to be delivered but shouldn't")
}
}
func TestClient_SendErrorNoEncoding(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
featureSet := "250-AUTH PLAIN\r\n250-DSN\r\n250 SMTPUTF8"
serverPort := TestServerPortBase + 1
go func() {
if err := simpleSMTPServer(ctx, featureSet, false, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
message := NewMsg()
if err := message.From("valid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("valid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "Test body")
message.SetMessageIDWithValue("this.is.a.message.id")
message.SetEncoding(NoEncoding)
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Send(message); err == nil {
t.Error("expected Send() to fail but didn't")
}
var sendErr *SendError
if !errors.As(err, &sendErr) {
t.Errorf("expected *SendError type as returned error, but got %T", sendErr)
}
if errors.As(err, &sendErr) {
if sendErr.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if sendErr.Reason != ErrNoUnencoded {
t.Errorf("expected ErrNoUnencoded error, but got %s", sendErr.Reason)
}
if !strings.EqualFold(sendErr.MessageID(), "<this.is.a.message.id>") {
t.Errorf("expected message ID: %q, but got %q", "<this.is.a.message.id>",
sendErr.MessageID())
}
if sendErr.Msg() == nil {
t.Errorf("expected message to be set, but got nil")
}
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_SendErrorMailFrom(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 2
featureSet := "250-AUTH PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, false, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
message := NewMsg()
if err := message.From("invalid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("valid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "Test body")
message.SetMessageIDWithValue("this.is.a.message.id")
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Send(message); err == nil {
t.Error("expected Send() to fail but didn't")
}
var sendErr *SendError
if !errors.As(err, &sendErr) {
t.Errorf("expected *SendError type as returned error, but got %T", sendErr)
}
if errors.As(err, &sendErr) {
if sendErr.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if sendErr.Reason != ErrSMTPMailFrom {
t.Errorf("expected ErrSMTPMailFrom error, but got %s", sendErr.Reason)
}
if !strings.EqualFold(sendErr.MessageID(), "<this.is.a.message.id>") {
t.Errorf("expected message ID: %q, but got %q", "<this.is.a.message.id>",
sendErr.MessageID())
}
if sendErr.Msg() == nil {
t.Errorf("expected message to be set, but got nil")
}
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_SendErrorMailFromReset(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 3
featureSet := "250-AUTH PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, true, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
message := NewMsg()
if err := message.From("invalid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("valid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "Test body")
message.SetMessageIDWithValue("this.is.a.message.id")
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Send(message); err == nil {
t.Error("expected Send() to fail but didn't")
}
var sendErr *SendError
if !errors.As(err, &sendErr) {
t.Errorf("expected *SendError type as returned error, but got %T", sendErr)
}
if errors.As(err, &sendErr) {
if sendErr.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if sendErr.Reason != ErrSMTPMailFrom {
t.Errorf("expected ErrSMTPMailFrom error, but got %s", sendErr.Reason)
}
if !strings.EqualFold(sendErr.MessageID(), "<this.is.a.message.id>") {
t.Errorf("expected message ID: %q, but got %q", "<this.is.a.message.id>",
sendErr.MessageID())
}
if len(sendErr.errlist) != 2 {
t.Errorf("expected 2 errors, but got %d", len(sendErr.errlist))
return
}
if !strings.EqualFold(sendErr.errlist[0].Error(), "503 5.1.2 Invalid from: <invalid-from@domain.tld>") {
t.Errorf("expected error: %q, but got %q",
"503 5.1.2 Invalid from: <invalid-from@domain.tld>", sendErr.errlist[0].Error())
}
if !strings.EqualFold(sendErr.errlist[1].Error(), "500 5.1.2 Error: reset failed") {
t.Errorf("expected error: %q, but got %q",
"500 5.1.2 Error: reset failed", sendErr.errlist[1].Error())
}
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_SendErrorToReset(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 4
featureSet := "250-AUTH PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, true, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
message := NewMsg()
if err := message.From("valid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("invalid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "Test body")
message.SetMessageIDWithValue("this.is.a.message.id")
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Send(message); err == nil {
t.Error("expected Send() to fail but didn't")
}
var sendErr *SendError
if !errors.As(err, &sendErr) {
t.Errorf("expected *SendError type as returned error, but got %T", sendErr)
}
if errors.As(err, &sendErr) {
if sendErr.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if sendErr.Reason != ErrSMTPRcptTo {
t.Errorf("expected ErrSMTPRcptTo error, but got %s", sendErr.Reason)
}
if !strings.EqualFold(sendErr.MessageID(), "<this.is.a.message.id>") {
t.Errorf("expected message ID: %q, but got %q", "<this.is.a.message.id>",
sendErr.MessageID())
}
if len(sendErr.errlist) != 2 {
t.Errorf("expected 2 errors, but got %d", len(sendErr.errlist))
return
}
if !strings.EqualFold(sendErr.errlist[0].Error(), "500 5.1.2 Invalid to: <invalid-to@domain.tld>") {
t.Errorf("expected error: %q, but got %q",
"500 5.1.2 Invalid to: <invalid-to@domain.tld>", sendErr.errlist[0].Error())
}
if !strings.EqualFold(sendErr.errlist[1].Error(), "500 5.1.2 Error: reset failed") {
t.Errorf("expected error: %q, but got %q",
"500 5.1.2 Error: reset failed", sendErr.errlist[1].Error())
}
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_SendErrorDataClose(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 5
featureSet := "250-AUTH PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, false, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
message := NewMsg()
if err := message.From("valid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("valid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "DATA close should fail")
message.SetMessageIDWithValue("this.is.a.message.id")
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Send(message); err == nil {
t.Error("expected Send() to fail but didn't")
}
var sendErr *SendError
if !errors.As(err, &sendErr) {
t.Errorf("expected *SendError type as returned error, but got %T", sendErr)
}
if errors.As(err, &sendErr) {
if sendErr.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if sendErr.Reason != ErrSMTPDataClose {
t.Errorf("expected ErrSMTPDataClose error, but got %s", sendErr.Reason)
}
if !strings.EqualFold(sendErr.MessageID(), "<this.is.a.message.id>") {
t.Errorf("expected message ID: %q, but got %q", "<this.is.a.message.id>",
sendErr.MessageID())
}
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_SendErrorDataWrite(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 6
featureSet := "250-AUTH PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, false, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
message := NewMsg()
if err := message.From("valid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("valid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "DATA write should fail")
message.SetMessageIDWithValue("this.is.a.message.id")
message.SetGenHeader("X-Test-Header", "DATA write should fail")
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Send(message); err == nil {
t.Error("expected Send() to fail but didn't")
}
var sendErr *SendError
if !errors.As(err, &sendErr) {
t.Errorf("expected *SendError type as returned error, but got %T", sendErr)
}
if errors.As(err, &sendErr) {
if sendErr.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if sendErr.Reason != ErrSMTPDataClose {
t.Errorf("expected ErrSMTPDataClose error, but got %s", sendErr.Reason)
}
if !strings.EqualFold(sendErr.MessageID(), "<this.is.a.message.id>") {
t.Errorf("expected message ID: %q, but got %q", "<this.is.a.message.id>",
sendErr.MessageID())
}
}
}
func TestClient_SendErrorReset(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 7
featureSet := "250-AUTH PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, true, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
message := NewMsg()
if err := message.From("valid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("valid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "Test body")
message.SetMessageIDWithValue("this.is.a.message.id")
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Send(message); err == nil {
t.Error("expected Send() to fail but didn't")
}
var sendErr *SendError
if !errors.As(err, &sendErr) {
t.Errorf("expected *SendError type as returned error, but got %T", sendErr)
}
if errors.As(err, &sendErr) {
if sendErr.IsTemp() {
t.Errorf("expected permanent error but IsTemp() returned true")
}
if sendErr.Reason != ErrSMTPReset {
t.Errorf("expected ErrSMTPReset error, but got %s", sendErr.Reason)
}
if !strings.EqualFold(sendErr.MessageID(), "<this.is.a.message.id>") {
t.Errorf("expected message ID: %q, but got %q", "<this.is.a.message.id>",
sendErr.MessageID())
}
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_DialSendConcurrent_online(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
client, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
var messages []*Msg
for i := 0; i < 10; i++ {
message := NewMsg()
if err := message.FromFormat("go-mail Test Mailer", os.Getenv("TEST_FROM")); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To(TestRcpt); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject(fmt.Sprintf("Test subject for mail %d", i))
message.SetBodyString(TypeTextPlain, fmt.Sprintf("This is the test body of the mail no. %d", i))
message.SetMessageID()
messages = append(messages, message)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
wg := sync.WaitGroup{}
for id, message := range messages {
wg.Add(1)
go func(curMsg *Msg, curID int) {
defer wg.Done()
if goroutineErr := client.Send(curMsg); err != nil {
t.Errorf("failed to send message with ID %d: %s", curID, goroutineErr)
}
}(message, id)
}
wg.Wait()
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_DialSendConcurrent_local(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 20
featureSet := "250-AUTH PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, false, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 500)
client, err := NewClient(TestServerAddr, WithPort(serverPort),
WithTLSPortPolicy(NoTLS), WithSMTPAuth(SMTPAuthPlain),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
}
var messages []*Msg
for i := 0; i < 20; i++ {
message := NewMsg()
if err := message.From("valid-from@domain.tld"); err != nil {
t.Errorf("failed to set FROM address: %s", err)
return
}
if err := message.To("valid-to@domain.tld"); err != nil {
t.Errorf("failed to set TO address: %s", err)
return
}
message.Subject("Test subject")
message.SetBodyString(TypeTextPlain, "Test body")
message.SetMessageIDWithValue("this.is.a.message.id")
messages = append(messages, message)
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
wg := sync.WaitGroup{}
for id, message := range messages {
wg.Add(1)
go func(curMsg *Msg, curID int) {
defer wg.Done()
if goroutineErr := client.Send(curMsg); err != nil {
t.Errorf("failed to send message with ID %d: %s", curID, goroutineErr)
}
}(message, id)
}
wg.Wait()
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
}
func TestClient_AuthSCRAMSHAX(t *testing.T) {
if os.Getenv("TEST_ONLINE_SCRAM") == "" {
t.Skipf("TEST_ONLINE_SCRAM is not set. Skipping online SCRAM tests")
}
hostname := os.Getenv("TEST_HOST_SCRAM")
username := os.Getenv("TEST_USER_SCRAM")
password := os.Getenv("TEST_PASS_SCRAM")
tests := []struct {
name string
authtype SMTPAuthType
}{
{"SCRAM-SHA-1", SMTPAuthSCRAMSHA1},
{"SCRAM-SHA-256", SMTPAuthSCRAMSHA256},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
client, err := NewClient(hostname,
WithTLSPortPolicy(TLSMandatory),
WithSMTPAuth(tt.authtype),
WithUsername(username), WithPassword(password))
if err != nil {
t.Errorf("unable to create new client: %s", err)
return
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
})
}
}
func TestClient_AuthLoginSuccess(t *testing.T) {
tests := []struct {
name string
featureSet string
}{
{"default", "250-AUTH LOGIN\r\n250-X-DEFAULT-LOGIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"},
{"mox server", "250-AUTH LOGIN\r\n250-X-MOX-LOGIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"},
{"null byte", "250-AUTH LOGIN\r\n250-X-NULLBYTE-LOGIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"},
{"bogus responses", "250-AUTH LOGIN\r\n250-X-BOGUS-LOGIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"},
{"empty responses", "250-AUTH LOGIN\r\n250-X-EMPTY-LOGIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"},
}
for i, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 40 + i
go func() {
if err := simpleSMTPServer(ctx, tt.featureSet, true, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
client, err := NewClient(TestServerAddr,
WithPort(serverPort),
WithTLSPortPolicy(NoTLS),
WithSMTPAuth(SMTPAuthLogin),
WithUsername("toni@tester.com"),
WithPassword("V3ryS3cr3t+"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
return
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
})
}
}
func TestClient_AuthLoginFail(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 50
featureSet := "250-AUTH LOGIN\r\n250-X-DEFAULT-LOGIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, true, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 300)
client, err := NewClient(TestServerAddr,
WithPort(serverPort),
WithTLSPortPolicy(NoTLS),
WithSMTPAuth(SMTPAuthLogin),
WithUsername("toni@tester.com"),
WithPassword("InvalidPassword"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
return
}
if err = client.DialWithContext(context.Background()); err == nil {
t.Error("expected to fail to dial to test server, but it succeeded")
}
}
func TestClient_AuthLoginFail_noTLS(t *testing.T) {
if os.Getenv("TEST_SKIP_ONLINE") != "" {
t.Skipf("env variable TEST_SKIP_ONLINE is set. Skipping online tests")
}
th := os.Getenv("TEST_HOST")
if th == "" {
t.Skipf("no host set. Skipping online tests")
}
tp := 587
if tps := os.Getenv("TEST_PORT"); tps != "" {
tpi, err := strconv.Atoi(tps)
if err == nil {
tp = tpi
}
}
client, err := NewClient(th, WithPort(tp), WithSMTPAuth(SMTPAuthLogin), WithTLSPolicy(NoTLS))
if err != nil {
t.Errorf("failed to create new client: %s", err)
}
u := os.Getenv("TEST_SMTPAUTH_USER")
if u != "" {
client.SetUsername(u)
}
p := os.Getenv("TEST_SMTPAUTH_PASS")
if p != "" {
client.SetPassword(p)
}
// We don't want to log authentication data in tests
client.SetDebugLog(false)
if err = client.DialWithContext(context.Background()); err == nil {
t.Error("expected to fail to dial to test server, but it succeeded")
}
if !errors.Is(err, smtp.ErrUnencrypted) {
t.Errorf("expected error to be %s, but got %s", smtp.ErrUnencrypted, err)
}
}
func TestClient_AuthSCRAMSHAX_fail(t *testing.T) {
if os.Getenv("TEST_ONLINE_SCRAM") == "" {
t.Skipf("TEST_ONLINE_SCRAM is not set. Skipping online SCRAM tests")
}
hostname := os.Getenv("TEST_HOST_SCRAM")
tests := []struct {
name string
authtype SMTPAuthType
}{
{"SCRAM-SHA-1", SMTPAuthSCRAMSHA1},
{"SCRAM-SHA-1-PLUS", SMTPAuthSCRAMSHA1PLUS},
{"SCRAM-SHA-256", SMTPAuthSCRAMSHA256},
{"SCRAM-SHA-256-PLUS", SMTPAuthSCRAMSHA256PLUS},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
client, err := NewClient(hostname,
WithTLSPortPolicy(TLSMandatory),
WithSMTPAuth(tt.authtype),
WithUsername("invalid"), WithPassword("invalid"))
if err != nil {
t.Errorf("unable to create new client: %s", err)
return
}
if err = client.DialWithContext(context.Background()); err == nil {
t.Errorf("expected error but got nil")
}
})
}
}
func TestClient_AuthSCRAMSHAX_unsupported(t *testing.T) {
if os.Getenv("TEST_ALLOW_SEND") == "" {
t.Skipf("TEST_ALLOW_SEND is not set. Skipping mail sending test")
}
client, err := getTestConnection(true)
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
tests := []struct {
name string
authtype SMTPAuthType
expErr error
}{
{"SCRAM-SHA-1", SMTPAuthSCRAMSHA1, ErrSCRAMSHA1AuthNotSupported},
{"SCRAM-SHA-1-PLUS", SMTPAuthSCRAMSHA1PLUS, ErrSCRAMSHA1PLUSAuthNotSupported},
{"SCRAM-SHA-256", SMTPAuthSCRAMSHA256, ErrSCRAMSHA256AuthNotSupported},
{"SCRAM-SHA-256-PLUS", SMTPAuthSCRAMSHA256PLUS, ErrSCRAMSHA256PLUSAuthNotSupported},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
client.SetSMTPAuth(tt.authtype)
client.SetTLSPolicy(TLSMandatory)
if err = client.DialWithContext(context.Background()); err == nil {
t.Errorf("expected error but got nil")
}
if !errors.Is(err, tt.expErr) {
t.Errorf("expected error %s, but got %s", tt.expErr, err)
}
})
}
}
func TestClient_AuthSCRAMSHAXPLUS_tlsexporter(t *testing.T) {
if os.Getenv("TEST_ONLINE_SCRAM") == "" {
t.Skipf("TEST_ONLINE_SCRAM is not set. Skipping online SCRAM tests")
}
hostname := os.Getenv("TEST_HOST_SCRAM")
username := os.Getenv("TEST_USER_SCRAM")
password := os.Getenv("TEST_PASS_SCRAM")
tests := []struct {
name string
authtype SMTPAuthType
}{
{"SCRAM-SHA-1-PLUS", SMTPAuthSCRAMSHA1PLUS},
{"SCRAM-SHA-256-PLUS", SMTPAuthSCRAMSHA256PLUS},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
client, err := NewClient(hostname,
WithTLSPortPolicy(TLSMandatory),
WithSMTPAuth(tt.authtype),
WithUsername(username), WithPassword(password))
if err != nil {
t.Errorf("unable to create new client: %s", err)
return
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
})
}
}
func TestClient_AuthSCRAMSHAXPLUS_tlsunique(t *testing.T) {
if os.Getenv("TEST_ONLINE_SCRAM") == "" {
t.Skipf("TEST_ONLINE_SCRAM is not set. Skipping online SCRAM tests")
}
hostname := os.Getenv("TEST_HOST_SCRAM")
username := os.Getenv("TEST_USER_SCRAM")
password := os.Getenv("TEST_PASS_SCRAM")
tlsConfig := &tls.Config{}
tlsConfig.MaxVersion = tls.VersionTLS12
tlsConfig.ServerName = hostname
tests := []struct {
name string
authtype SMTPAuthType
}{
{"SCRAM-SHA-1-PLUS", SMTPAuthSCRAMSHA1PLUS},
{"SCRAM-SHA-256-PLUS", SMTPAuthSCRAMSHA256PLUS},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
client, err := NewClient(hostname,
WithTLSPortPolicy(TLSMandatory),
WithTLSConfig(tlsConfig),
WithSMTPAuth(tt.authtype),
WithUsername(username), WithPassword(password))
if err != nil {
t.Errorf("unable to create new client: %s", err)
return
}
if err = client.DialWithContext(context.Background()); err != nil {
t.Errorf("failed to dial to test server: %s", err)
}
if err = client.Close(); err != nil {
t.Errorf("failed to close server connection: %s", err)
}
})
}
}
// getTestConnection takes environment variables to establish a connection to a real
// SMTP server to test all functionality that requires a connection
func getTestConnection(auth bool) (*Client, error) {
if os.Getenv("TEST_SKIP_ONLINE") != "" {
return nil, fmt.Errorf("env variable TEST_SKIP_ONLINE is set. Skipping online tests")
}
th := os.Getenv("TEST_HOST")
if th == "" {
return nil, fmt.Errorf("no TEST_HOST set")
}
tp := 25
if tps := os.Getenv("TEST_PORT"); tps != "" {
tpi, err := strconv.Atoi(tps)
if err == nil {
tp = tpi
}
}
sv := false
if sve := os.Getenv("TEST_TLS_SKIP_VERIFY"); sve != "" {
sv = true
}
c, err := NewClient(th, WithPort(tp))
if err != nil {
return c, err
}
c.tlsconfig.InsecureSkipVerify = sv
if auth {
st := os.Getenv("TEST_SMTPAUTH_TYPE")
if st != "" {
c.SetSMTPAuth(SMTPAuthType(st))
}
u := os.Getenv("TEST_SMTPAUTH_USER")
if u != "" {
c.SetUsername(u)
}
p := os.Getenv("TEST_SMTPAUTH_PASS")
if p != "" {
c.SetPassword(p)
}
// We don't want to log authentication data in tests
c.SetDebugLog(false)
}
if err = c.DialWithContext(context.Background()); err != nil {
return c, fmt.Errorf("connection to test server failed: %w", err)
}
if err = c.Close(); err != nil {
return c, fmt.Errorf("disconnect from test server failed: %w", err)
}
return c, nil
}
// getTestConnectionNoTestPort takes environment variables (except the port) to establish a
// connection to a real SMTP server to test all functionality that requires a connection
func getTestConnectionNoTestPort(auth bool) (*Client, error) {
if os.Getenv("TEST_SKIP_ONLINE") != "" {
return nil, fmt.Errorf("env variable TEST_SKIP_ONLINE is set. Skipping online tests")
}
th := os.Getenv("TEST_HOST")
if th == "" {
return nil, fmt.Errorf("no TEST_HOST set")
}
sv := false
if sve := os.Getenv("TEST_TLS_SKIP_VERIFY"); sve != "" {
sv = true
}
c, err := NewClient(th)
if err != nil {
return c, err
}
c.tlsconfig.InsecureSkipVerify = sv
if auth {
st := os.Getenv("TEST_SMTPAUTH_TYPE")
if st != "" {
c.SetSMTPAuth(SMTPAuthType(st))
}
u := os.Getenv("TEST_SMTPAUTH_USER")
if u != "" {
c.SetUsername(u)
}
p := os.Getenv("TEST_SMTPAUTH_PASS")
if p != "" {
c.SetPassword(p)
}
// We don't want to log authentication data in tests
c.SetDebugLog(false)
}
if err := c.DialWithContext(context.Background()); err != nil {
return c, fmt.Errorf("connection to test server failed: %w", err)
}
if err := c.Close(); err != nil {
return c, fmt.Errorf("disconnect from test server failed: %w", err)
}
return c, nil
}
// getTestClient takes environment variables to establish a client without connecting
// to the SMTP server
func getTestClient(auth bool) (*Client, error) {
if os.Getenv("TEST_SKIP_ONLINE") != "" {
return nil, fmt.Errorf("env variable TEST_SKIP_ONLINE is set. Skipping online tests")
}
th := os.Getenv("TEST_HOST")
if th == "" {
return nil, fmt.Errorf("no TEST_HOST set")
}
tp := 25
if tps := os.Getenv("TEST_PORT"); tps != "" {
tpi, err := strconv.Atoi(tps)
if err == nil {
tp = tpi
}
}
sv := false
if sve := os.Getenv("TEST_TLS_SKIP_VERIFY"); sve != "" {
sv = true
}
c, err := NewClient(th, WithPort(tp))
if err != nil {
return c, err
}
c.tlsconfig.InsecureSkipVerify = sv
if auth {
st := os.Getenv("TEST_SMTPAUTH_TYPE")
if st != "" {
c.SetSMTPAuth(SMTPAuthType(st))
}
u := os.Getenv("TEST_SMTPAUTH_USER")
if u != "" {
c.SetUsername(u)
}
p := os.Getenv("TEST_SMTPAUTH_PASS")
if p != "" {
c.SetPassword(p)
}
// We don't want to log authentication data in tests
c.SetDebugLog(false)
}
return c, nil
}
// getTestConnectionWithDSN takes environment variables to establish a connection to a real
// SMTP server to test all functionality that requires a connection. It also enables DSN
func getTestConnectionWithDSN(auth bool) (*Client, error) {
if os.Getenv("TEST_SKIP_ONLINE") != "" {
return nil, fmt.Errorf("env variable TEST_SKIP_ONLINE is set. Skipping online tests")
}
th := os.Getenv("TEST_HOST")
if th == "" {
return nil, fmt.Errorf("no TEST_HOST set")
}
tp := 25
if tps := os.Getenv("TEST_PORT"); tps != "" {
tpi, err := strconv.Atoi(tps)
if err == nil {
tp = tpi
}
}
c, err := NewClient(th, WithDSN(), WithPort(tp))
if err != nil {
return c, err
}
if auth {
st := os.Getenv("TEST_SMTPAUTH_TYPE")
if st != "" {
c.SetSMTPAuth(SMTPAuthType(st))
}
u := os.Getenv("TEST_SMTPAUTH_USER")
if u != "" {
c.SetUsername(u)
}
p := os.Getenv("TEST_SMTPAUTH_PASS")
if p != "" {
c.SetPassword(p)
}
}
if err := c.DialWithContext(context.Background()); err != nil {
return c, fmt.Errorf("connection to test server failed: %w", err)
}
if err := c.Close(); err != nil {
return c, fmt.Errorf("disconnect from test server failed: %w", err)
}
return c, nil
}
func TestXOAuth2OK(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 30
featureSet := "250-AUTH XOAUTH2\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, false, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 500)
c, err := NewClient("127.0.0.1",
WithPort(serverPort),
WithTLSPortPolicy(TLSOpportunistic),
WithSMTPAuth(SMTPAuthXOAUTH2),
WithUsername("user"),
WithPassword("token"))
if err != nil {
t.Fatalf("unable to create new client: %v", err)
}
if err = c.DialWithContext(context.Background()); err != nil {
t.Fatalf("unexpected dial error: %v", err)
}
if err = c.Close(); err != nil {
t.Fatalf("disconnect from test server failed: %v", err)
}
}
func TestXOAuth2Unsupported(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
serverPort := TestServerPortBase + 31
featureSet := "250-AUTH LOGIN PLAIN\r\n250-8BITMIME\r\n250-DSN\r\n250 SMTPUTF8"
go func() {
if err := simpleSMTPServer(ctx, featureSet, false, serverPort); err != nil {
t.Errorf("failed to start test server: %s", err)
return
}
}()
time.Sleep(time.Millisecond * 500)
c, err := NewClient("127.0.0.1",
WithPort(serverPort),
WithTLSPolicy(TLSOpportunistic),
WithSMTPAuth(SMTPAuthXOAUTH2),
WithUsername("user"),
WithPassword("token"))
if err != nil {
t.Fatalf("unable to create new client: %v", err)
}
if err = c.DialWithContext(context.Background()); err == nil {
t.Fatal("expected dial error got nil")
} else {
if !errors.Is(err, ErrXOauth2AuthNotSupported) {
t.Fatalf("expected %v; got %v", ErrXOauth2AuthNotSupported, err)
}
}
if err = c.Close(); err != nil {
t.Fatalf("disconnect from test server failed: %v", err)
}
}
func TestXOAuth2OK_faker(t *testing.T) {
server := []string{
"220 Fake server ready ESMTP",
"250-fake.server",
"250-AUTH LOGIN XOAUTH2",
"250 8BITMIME",
"250 OK",
"235 2.7.0 Accepted",
"221 OK",
}
var wrote strings.Builder
var fake faker
fake.ReadWriter = struct {
io.Reader
io.Writer
}{
strings.NewReader(strings.Join(server, "\r\n")),
&wrote,
}
c, err := NewClient("fake.host",
WithDialContextFunc(getFakeDialFunc(fake)),
WithTLSPortPolicy(TLSOpportunistic),
WithSMTPAuth(SMTPAuthXOAUTH2),
WithUsername("user"),
WithPassword("token"))
if err != nil {
t.Fatalf("unable to create new client: %v", err)
}
if err = c.DialWithContext(context.Background()); err != nil {
t.Fatalf("unexpected dial error: %v", err)
}
if err = c.Close(); err != nil {
t.Fatalf("disconnect from test server failed: %v", err)
}
if !strings.Contains(wrote.String(), "AUTH XOAUTH2 dXNlcj11c2VyAWF1dGg9QmVhcmVyIHRva2VuAQE=\r\n") {
t.Fatalf("got %q; want AUTH XOAUTH2 dXNlcj11c2VyAWF1dGg9QmVhcmVyIHRva2VuAQE=\r\n", wrote.String())
}
}
func TestXOAuth2Unsupported_faker(t *testing.T) {
server := []string{
"220 Fake server ready ESMTP",
"250-fake.server",
"250-AUTH LOGIN PLAIN",
"250 8BITMIME",
"250 OK",
"221 OK",
}
var wrote strings.Builder
var fake faker
fake.ReadWriter = struct {
io.Reader
io.Writer
}{
strings.NewReader(strings.Join(server, "\r\n")),
&wrote,
}
c, err := NewClient("fake.host",
WithDialContextFunc(getFakeDialFunc(fake)),
WithTLSPortPolicy(TLSOpportunistic),
WithSMTPAuth(SMTPAuthXOAUTH2))
if err != nil {
t.Fatalf("unable to create new client: %v", err)
}
if err = c.DialWithContext(context.Background()); err == nil {
t.Fatal("expected dial error got nil")
} else {
if !errors.Is(err, ErrXOauth2AuthNotSupported) {
t.Fatalf("expected %v; got %v", ErrXOauth2AuthNotSupported, err)
}
}
if err = c.Close(); err != nil {
t.Fatalf("disconnect from test server failed: %v", err)
}
client := strings.Split(wrote.String(), "\r\n")
if len(client) != 4 {
t.Fatalf("unexpected number of client requests got %d; want 5", len(client))
}
if !strings.HasPrefix(client[0], "EHLO") {
t.Fatalf("expected EHLO, got %q", client[0])
}
if client[1] != "NOOP" {
t.Fatalf("expected NOOP, got %q", client[1])
}
if client[2] != "QUIT" {
t.Fatalf("expected QUIT, got %q", client[3])
}
}
func getFakeDialFunc(conn net.Conn) DialContextFunc {
return func(ctx context.Context, network, address string) (net.Conn, error) {
return conn, nil
}
}
type faker struct {
io.ReadWriter
}
func (f faker) Close() error { return nil }
func (f faker) LocalAddr() net.Addr { return nil }
func (f faker) RemoteAddr() net.Addr { return nil }
func (f faker) SetDeadline(time.Time) error { return nil }
func (f faker) SetReadDeadline(time.Time) error { return nil }
func (f faker) SetWriteDeadline(time.Time) error { return nil }
// simpleSMTPServer starts a simple TCP server that resonds to SMTP commands.
// The provided featureSet represents in what the server responds to EHLO command
// failReset controls if a RSET succeeds
func simpleSMTPServer(ctx context.Context, featureSet string, failReset bool, port int) error {
listener, err := net.Listen(TestServerProto, fmt.Sprintf("%s:%d", TestServerAddr, port))
if err != nil {
return fmt.Errorf("unable to listen on %s://%s: %w", TestServerProto, TestServerAddr, err)
}
defer func() {
if err := listener.Close(); err != nil {
fmt.Printf("unable to close listener: %s\n", err)
os.Exit(1)
}
}()
for {
select {
case <-ctx.Done():
return nil
default:
connection, err := listener.Accept()
var opErr *net.OpError
if err != nil {
if errors.As(err, &opErr) && opErr.Temporary() {
continue
}
return fmt.Errorf("unable to accept connection: %w", err)
}
handleTestServerConnection(connection, featureSet, failReset)
}
}
}
func handleTestServerConnection(connection net.Conn, featureSet string, failReset bool) {
defer func() {
if err := connection.Close(); err != nil {
fmt.Printf("unable to close connection: %s\n", err)
}
}()
reader := bufio.NewReader(connection)
writer := bufio.NewWriter(connection)
writeLine := func(data string) error {
_, err := writer.WriteString(data + "\r\n")
if err != nil {
return fmt.Errorf("unable to write line: %w", err)
}
return writer.Flush()
}
writeOK := func() {
_ = writeLine("250 2.0.0 OK")
}
if err := writeLine("220 go-mail test server ready ESMTP"); err != nil {
fmt.Printf("unable to write to client: %s\n", err)
return
}
data, err := reader.ReadString('\n')
if err != nil {
return
}
if !strings.HasPrefix(data, "EHLO") && !strings.HasPrefix(data, "HELO") {
fmt.Printf("expected EHLO, got %q", data)
return
}
if err = writeLine("250-localhost.localdomain\r\n" + featureSet); err != nil {
return
}
for {
data, err = reader.ReadString('\n')
if err != nil {
break
}
time.Sleep(time.Millisecond)
var datastring string
data = strings.TrimSpace(data)
switch {
case strings.HasPrefix(data, "MAIL FROM:"):
from := strings.TrimPrefix(data, "MAIL FROM:")
from = strings.ReplaceAll(from, "BODY=8BITMIME", "")
from = strings.ReplaceAll(from, "SMTPUTF8", "")
from = strings.TrimSpace(from)
if !strings.EqualFold(from, "<valid-from@domain.tld>") {
_ = writeLine(fmt.Sprintf("503 5.1.2 Invalid from: %s", from))
break
}
writeOK()
case strings.HasPrefix(data, "RCPT TO:"):
to := strings.TrimPrefix(data, "RCPT TO:")
to = strings.TrimSpace(to)
if !strings.EqualFold(to, "<valid-to@domain.tld>") {
_ = writeLine(fmt.Sprintf("500 5.1.2 Invalid to: %s", to))
break
}
writeOK()
case strings.HasPrefix(data, "AUTH XOAUTH2"):
auth := strings.TrimPrefix(data, "AUTH XOAUTH2 ")
if !strings.EqualFold(auth, "dXNlcj11c2VyAWF1dGg9QmVhcmVyIHRva2VuAQE=") {
_ = writeLine("535 5.7.8 Error: authentication failed")
break
}
_ = writeLine("235 2.7.0 Authentication successful")
case strings.HasPrefix(data, "AUTH PLAIN"):
auth := strings.TrimPrefix(data, "AUTH PLAIN ")
if !strings.EqualFold(auth, "AHRvbmlAdGVzdGVyLmNvbQBWM3J5UzNjcjN0Kw==") {
_ = writeLine("535 5.7.8 Error: authentication failed")
break
}
_ = writeLine("235 2.7.0 Authentication successful")
case strings.HasPrefix(data, "AUTH LOGIN"):
var username, password string
userResp := "VXNlcm5hbWU6"
passResp := "UGFzc3dvcmQ6"
if strings.Contains(featureSet, "250-X-MOX-LOGIN") {
userResp = ""
passResp = "UGFzc3dvcmQ="
}
if strings.Contains(featureSet, "250-X-NULLBYTE-LOGIN") {
userResp = "VXNlciBuYW1lAA=="
passResp = "UGFzc3dvcmQA"
}
if strings.Contains(featureSet, "250-X-BOGUS-LOGIN") {
userResp = "Qm9ndXM="
passResp = "Qm9ndXM="
}
if strings.Contains(featureSet, "250-X-EMPTY-LOGIN") {
userResp = ""
passResp = ""
}
_ = writeLine("334 " + userResp)
ddata, derr := reader.ReadString('\n')
if derr != nil {
fmt.Printf("failed to read username data from connection: %s\n", derr)
break
}
ddata = strings.TrimSpace(ddata)
username = ddata
_ = writeLine("334 " + passResp)
ddata, derr = reader.ReadString('\n')
if derr != nil {
fmt.Printf("failed to read password data from connection: %s\n", derr)
break
}
ddata = strings.TrimSpace(ddata)
password = ddata
if !strings.EqualFold(username, "dG9uaUB0ZXN0ZXIuY29t") ||
!strings.EqualFold(password, "VjNyeVMzY3IzdCs=") {
_ = writeLine("535 5.7.8 Error: authentication failed")
break
}
_ = writeLine("235 2.7.0 Authentication successful")
case strings.EqualFold(data, "DATA"):
_ = writeLine("354 End data with <CR><LF>.<CR><LF>")
for {
ddata, derr := reader.ReadString('\n')
if derr != nil {
fmt.Printf("failed to read DATA data from connection: %s\n", derr)
break
}
ddata = strings.TrimSpace(ddata)
if strings.EqualFold(ddata, "DATA write should fail") {
_ = writeLine("500 5.0.0 Error during DATA transmission")
break
}
if ddata == "." {
if strings.Contains(datastring, "DATA close should fail") {
_ = writeLine("500 5.0.0 Error during DATA closing")
break
}
_ = writeLine("250 2.0.0 Ok: queued as 1234567890")
break
}
datastring += ddata + "\n"
}
case strings.EqualFold(data, "noop"),
strings.EqualFold(data, "vrfy"):
writeOK()
case strings.EqualFold(data, "rset"):
if failReset {
_ = writeLine("500 5.1.2 Error: reset failed")
break
}
writeOK()
case strings.EqualFold(data, "quit"):
_ = writeLine("221 2.0.0 Bye")
default:
_ = writeLine("500 5.5.2 Error: bad syntax")
}
}
}
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