Use a config struct instead of plain variables for smtp details

mailer.go

@@ -20,21 +20,15 @@ type Mailer interface {
 }
 
 // NewMailer returns a new Mailer using provided configuration
-func NewMailer(host string, port int, user, pass string, ssl bool) Mailer {
+func NewMailer(config Config, ssl bool) Mailer {
 	var mailer Mailer
 	if ssl {
 		smtpssl := new(SMTPSLL)
-		smtpssl.Host = host
-		smtpssl.Port = port
-		smtpssl.User = user
-		smtpssl.Pass = pass
+		smtpssl.Config = config
 		mailer = smtpssl
 	} else {
 		smtp := new(SMTP)
-		smtp.Host = host
-		smtp.Port = port
-		smtp.User = user
-		smtp.Pass = pass
+		smtp.Config = config
 		mailer = smtp
 	}
 	return mailer

mailer_test.go

@@ -14,37 +14,52 @@ var (
 )
 
 func TestSMTP(t *testing.T) {
+	config := Config{
+		Host: host,
+		Port: 25,
+		User: user,
+		Pass: pass,
+	}
+
+	mailer := NewMailer(config, false)
+
 	mail := NewMail()
 	mail.FromName = "Go Mailer"
 	mail.From = user
+	mail.SetTo(recipent)
+
 	mail.Subject = "Go SMTP Test"
 	mail.Body = "This is a test e-mail from Go Mailer via SMTP"
-	mail.SetTo(recipent)
 
-	mailer := NewMailer(host, 25, user, pass, false)
 	if err := mailer.Send(mail); err != nil {
 		t.Errorf("Send error: %s", err)
 	}
 }
 
 func TestSMTPSSL(t *testing.T) {
+	config := Config{
+		Host: host,
+		Port: 465,
+		User: user,
+		Pass: pass,
+	}
+
+	mailer := NewMailer(config, true)
+
 	mail := NewMail()
 	mail.FromName = "Go Mailer"
 	mail.From = user
+	// multiple recipents
+	mail.SetTo(recipent)
+	mail.SetTo(recipent2)
+
 	mail.Subject = "Go SMTP SSL Test"
 	// the rich message body
 	mail.Body = `
 		<h2>Hello from Go Mailer</h2>
-		<p>
-			This is a test e-mail from Go Mailer via SMTP SSL
-		</p>
+		<p>This is a test e-mail from Go Mailer via SMTP SSL</p>
 	`
 
-	// multiple recipents
-	mail.SetTo(recipent)
-	mail.SetTo(recipent2)
-
-	mailer := NewMailer(host, 465, user, pass, true)
 	if err := mailer.Send(mail); err != nil {
 		t.Errorf("Send error: %s", err)
 	}