feat: unit testing mocked repos / domain

test/mail_test.go

@@ -0,0 +1,55 @@
+package test
+
+import (
+	"RenewCMS/internal/domain/mail"
+	"RenewCMS/internal/infrastructure/useCases"
+	"errors"
+	"testing"
+)
+
+type mockMailRepo struct {
+	SentEmails []struct {
+		Address  string
+		Template string
+		Data     any
+	}
+	ShouldFail bool
+}
+
+func (m *mockMailRepo) Send(receiverAddress string, templateName string, data any) error {
+	if m.ShouldFail {
+		return errors.New("smtp error")
+	}
+	m.SentEmails = append(m.SentEmails, struct {
+		Address  string
+		Template string
+		Data     any
+	}{receiverAddress, templateName, data})
+	return nil
+}
+
+var _ mail.Repository = &mockMailRepo{}
+
+func TestSendMail(t *testing.T) {
+	repo := &mockMailRepo{}
+	uc := useCases.NewSendMailUseCase(repo)
+
+	t.Run("Successful Email Send", func(t *testing.T) {
+		repo.ShouldFail = false
+		err := uc.SendMail("user@example.com", "welcome", "User123")
+		if err != nil {
+			t.Fatalf("Expected no error, got %v", err)
+		}
+		if len(repo.SentEmails) != 1 {
+			t.Errorf("Expected 1 email to be sent, got %d", len(repo.SentEmails))
+		}
+	})
+
+	t.Run("Failed Email Send", func(t *testing.T) {
+		repo.ShouldFail = true
+		err := uc.SendMail("fail@example.com", "reset", nil)
+		if err == nil {
+			t.Errorf("Expected an error but got nil")
+		}
+	})
+}