Refactoring code for modular approach

tests/test_services.py

@@ -0,0 +1,60 @@
+# tests/test_services.py
+import pytest
+from app.services.product_service import ProductService
+from models.api_models import ProductCreate
+from models.database_models import Product
+
+
+class TestProductService:
+    def setup_method(self):
+        self.service = ProductService()
+
+    def test_create_product_with_gtin_validation(self, db):
+        """Test product creation with GTIN validation"""
+        product_data = ProductCreate(
+            product_id="SVC001",
+            title="Service Test Product",
+            gtin="1234567890123",
+            price="19.99",
+            marketplace="TestMarket"
+        )
+
+        product = self.service.create_product(db, product_data)
+
+        assert product.product_id == "SVC001"
+        assert product.gtin == "1234567890123"
+        assert product.marketplace == "TestMarket"
+
+    def test_create_product_invalid_gtin(self, db):
+        """Test product creation with invalid GTIN"""
+        product_data = ProductCreate(
+            product_id="SVC002",
+            title="Service Test Product",
+            gtin="invalid_gtin",
+            price="19.99"
+        )
+
+        with pytest.raises(ValueError, match="Invalid GTIN format"):
+            self.service.create_product(db, product_data)
+
+    def test_get_products_with_filters(self, db, test_product):
+        """Test getting products with various filters"""
+        products, total = self.service.get_products_with_filters(
+            db,
+            brand="TestBrand"
+        )
+
+        assert total == 1
+        assert len(products) == 1
+        assert products[0].brand == "TestBrand"
+
+    def test_get_products_with_search(self, db, test_product):
+        """Test getting products with search"""
+        products, total = self.service.get_products_with_filters(
+            db,
+            search="Test Product"
+        )
+
+        assert total == 1
+        assert len(products) == 1
+