    @Test
    void validateAndAdd() {

        // Arrange
        ProductFormData productData = new ProductFormData("Sample product",
                "Lipstick", 5D, 10D, false);
        FakeDatabase db = new FakeDatabase();
        ProductService sut = new ProductService(db);

        // Act
        Response response = sut.validateAndAdd(productData);

        // Assert
        String productString = "";
        if (db.product != null) {
            productString = db.product.toString();
        }
        String responseAndProduct = response.toString() + " " + productString;
        verify(responseAndProduct);

    }