byom-core-subscription/internal/platform/mailer/mailer_test.go

// mailer_test.go
package mailer

import (
	"bytes"
	"fmt"
	"html/template"
	"strings"
	"testing"

	"git.linuxforward.com/byom/byom-onboard/internal/platform/config"
)

func TestNewMailer(t *testing.T) {
	cfg := &config.MailerConfig{
		Identity: "",
		Username: "test@example.com",
		Password: "testpass",
		Host:     "localhost",
		Port:     "2525",
	}

	mailer := NewMailer(cfg)

	if mailer == nil {
		t.Error("Expected non-nil mailer")
	}

	if mailer.serverAddr != "localhost:2525" {
		t.Errorf("Expected server address 'localhost:2525', got %s", mailer.serverAddr)
	}

	if mailer.from != "test@example.com" {
		t.Errorf("Expected from address 'test@example.com', got %s", mailer.from)
	}
}

func TestSendEmail(t *testing.T) {
	// Create test data
	data := &EmailData{
		Username:   "testuser",
		Password:   "testpass",
		Subdomains: []string{"app1.example.com", "app2.example.com"},
		WebAppURL:  "https://main.example.com",
		SetupGuide: "1. Log in\n2. Configure settings",
	}

	// Create mailer with mock configuration
	cfg := &config.MailerConfig{
		Identity: "",
		Username: "test@example.com",
		Password: "testpass",
		Host:     "localhost",
		Port:     "2525",
	}

	mailer := NewMailer(cfg)

	// Test email sending
	err := mailer.SendEmail("recipient@example.com", data)
	if err != nil {
		t.Errorf("Expected no error, got %v", err)
	}

	// Test email content
	// Note: In a real implementation, you might want to capture the email content
	// using a mock SMTP server and verify its contents
}

// TestEmailTemplateRendering tests the template rendering separately
func TestEmailTemplateRendering(t *testing.T) {
	data := &EmailData{
		Username:   "testuser",
		Password:   "testpass",
		Subdomains: []string{"app1.example.com", "app2.example.com"},
		WebAppURL:  "https://main.example.com",
		SetupGuide: "1. Log in\n2. Configure settings",
	}

	tmpl := template.Must(template.New("welcomeEmail").Parse(welcomeEmailTemplate))
	var tpl bytes.Buffer

	err := tmpl.Execute(&tpl, data)
	if err != nil {
		t.Errorf("Template execution failed: %v", err)
	}

	result := tpl.String()

	fmt.Println(result)

	// Verify that all required information is present in the rendered template
	expectedContents := []string{
		data.Username,
		data.Password,
		data.Subdomains[0],
		data.Subdomains[1],
		data.WebAppURL,
		data.SetupGuide,
	}

	for _, expected := range expectedContents {
		if !strings.Contains(result, expected) {
			t.Errorf("Expected email to contain '%s'", expected)
		}
	}
}