From 4a18f76bd1416c9d3c11afd968769f26d58102e6 Mon Sep 17 00:00:00 2001
From: Tiago Yamamoto <japa@rede5.com.br>
Date: Fri, 2 Jan 2026 09:23:18 -0300
Subject: [PATCH] test: cover product import

---
 .../internal/usecase/product_service_test.go  | 130 ++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 backend/internal/usecase/product_service_test.go

diff --git a/backend/internal/usecase/product_service_test.go b/backend/internal/usecase/product_service_test.go
new file mode 100644
index 0000000..247ec7e
--- /dev/null
+++ b/backend/internal/usecase/product_service_test.go
@@ -0,0 +1,130 @@
+package usecase
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/gofrs/uuid/v5"
+	"github.com/saveinmed/backend-go/internal/domain"
+)
+
+type failingBatchRepo struct {
+	*MockRepository
+}
+
+func (f *failingBatchRepo) BatchCreateProducts(ctx context.Context, products []domain.Product) error {
+	return errors.New("boom")
+}
+
+func TestImportProductsSuccess(t *testing.T) {
+	repo := NewMockRepository()
+	svc := NewService(repo, &MockPaymentGateway{}, &MockNotificationService{}, 2.5, "secret", time.Hour, "pepper")
+
+	csvData := strings.NewReader("name,price,stock,description,ean\nAspirin,12.5,5,Anti-inflammatory,123\nIbuprofen,10,0,,\n")
+	sellerID := uuid.Must(uuid.NewV7())
+
+	report, err := svc.ImportProducts(context.Background(), sellerID, csvData)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	if report.TotalProcessed != 2 {
+		t.Fatalf("expected total processed 2, got %d", report.TotalProcessed)
+	}
+	if report.SuccessCount != 2 {
+		t.Fatalf("expected success count 2, got %d", report.SuccessCount)
+	}
+	if report.FailedCount != 0 {
+		t.Fatalf("expected failed count 0, got %d", report.FailedCount)
+	}
+
+	if len(repo.products) != 2 {
+		t.Fatalf("expected 2 products, got %d", len(repo.products))
+	}
+
+	if repo.products[0].SellerID != sellerID {
+		t.Errorf("expected seller ID %s, got %s", sellerID, repo.products[0].SellerID)
+	}
+	if repo.products[0].PriceCents != 1250 {
+		t.Errorf("expected price cents 1250, got %d", repo.products[0].PriceCents)
+	}
+	if repo.products[0].Stock != 5 {
+		t.Errorf("expected stock 5, got %d", repo.products[0].Stock)
+	}
+}
+
+func TestImportProductsMissingHeaders(t *testing.T) {
+	repo := NewMockRepository()
+	svc := NewService(repo, &MockPaymentGateway{}, &MockNotificationService{}, 2.5, "secret", time.Hour, "pepper")
+
+	csvData := strings.NewReader("ean,stock\n123,5\n")
+	_, err := svc.ImportProducts(context.Background(), uuid.Must(uuid.NewV7()), csvData)
+	if err == nil {
+		t.Fatal("expected error for missing headers")
+	}
+	if !strings.Contains(err.Error(), "missing required header") {
+		t.Fatalf("expected missing header error, got %v", err)
+	}
+}
+
+func TestImportProductsEmptyCSV(t *testing.T) {
+	repo := NewMockRepository()
+	svc := NewService(repo, &MockPaymentGateway{}, &MockNotificationService{}, 2.5, "secret", time.Hour, "pepper")
+
+	csvData := strings.NewReader("name,price\n")
+	_, err := svc.ImportProducts(context.Background(), uuid.Must(uuid.NewV7()), csvData)
+	if err == nil {
+		t.Fatal("expected error for empty CSV")
+	}
+	if !strings.Contains(err.Error(), "csv file is empty") {
+		t.Fatalf("expected empty csv error, got %v", err)
+	}
+}
+
+func TestImportProductsInvalidRows(t *testing.T) {
+	repo := NewMockRepository()
+	svc := NewService(repo, &MockPaymentGateway{}, &MockNotificationService{}, 2.5, "secret", time.Hour, "pepper")
+
+	csvData := strings.NewReader("name,price,stock\n,12.5,5\nValid,abc,2\nGood,5,1\n")
+	sellerID := uuid.Must(uuid.NewV7())
+
+	report, err := svc.ImportProducts(context.Background(), sellerID, csvData)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	if report.TotalProcessed != 3 {
+		t.Fatalf("expected total processed 3, got %d", report.TotalProcessed)
+	}
+	if report.FailedCount != 2 {
+		t.Fatalf("expected failed count 2, got %d", report.FailedCount)
+	}
+	if report.SuccessCount != 1 {
+		t.Fatalf("expected success count 1, got %d", report.SuccessCount)
+	}
+	if len(report.Errors) != 2 {
+		t.Fatalf("expected 2 errors, got %d", len(report.Errors))
+	}
+
+	if len(repo.products) != 1 {
+		t.Fatalf("expected 1 product, got %d", len(repo.products))
+	}
+}
+
+func TestImportProductsBatchInsertFailure(t *testing.T) {
+	baseRepo := NewMockRepository()
+	repo := &failingBatchRepo{MockRepository: baseRepo}
+	svc := NewService(repo, &MockPaymentGateway{}, &MockNotificationService{}, 2.5, "secret", time.Hour, "pepper")
+
+	csvData := strings.NewReader("name,price\nItem,12.5\n")
+	_, err := svc.ImportProducts(context.Background(), uuid.Must(uuid.NewV7()), csvData)
+	if err == nil {
+		t.Fatal("expected batch insert error")
+	}
+	if !strings.Contains(err.Error(), "batch insert failed") {
+		t.Fatalf("expected batch insert error, got %v", err)
+	}
+}