Add method to remove a product identity and make it look like a new product

Author: Ecarrion

WooCommerce/Classes/ViewRelated/Products/Add Product/ProductFactory.swift

@@ -16,6 +16,13 @@ struct ProductFactory {
             return nil
         }
     }
+
+    /// Copies a product by cleaning properties like `id, name, and statusKey` to their default state.
+    /// This is usefult to turn an existing(on core) `auto-draft` product into a new app-product ready to be saved.
+    ///
+    func newProduct(from existingProduct: Product) -> Product {
+        existingProduct.copy(productID: 0, name: "", statusKey: ProductStatus.published.rawValue)
+    }
 }
 
 private extension ProductFactory {

WooCommerce/WooCommerceTests/ViewRelated/Products/Add Product/ProductFactoryTests.swift

@@ -1,4 +1,6 @@
 import XCTest
+import Fakes
+import Networking
 @testable import WooCommerce
 
 final class ProductFactoryTests: XCTestCase {
@@ -40,4 +42,23 @@ final class ProductFactoryTests: XCTestCase {
         let product = ProductFactory().createNewProduct(type: .custom("any"), isVirtual: false, siteID: siteID)
         XCTAssertNil(product)
     }
+
+    func test_creating_new_product_removes_expected_fields() {
+        // Given
+        let product = Product.fake().copy(siteID: 123, productID: 1234, name: "Test Product", statusKey: ProductStatus.autoDraft.rawValue, price: "20.00")
+
+        // When
+        let newProduct = ProductFactory().newProduct(from: product)
+
+        // Then
+
+        // Stay the same
+        XCTAssertEqual(newProduct.siteID, product.siteID)
+        XCTAssertEqual(newProduct.price, product.price)
+
+        // Changes
+        XCTAssertEqual(newProduct.productID, 0)
+        XCTAssertEqual(newProduct.name, "")
+        XCTAssertEqual(newProduct.statusKey, ProductStatus.published.rawValue)
+    }
 }