Upgrading Sylius the TDD Way: Exploring Behat

Extending Sylius with StoryBDD: Enhancing Product Inventory Management

This article details adding inventory tracking to Sylius, focusing on StoryBDD testing with Behat. We previously added backend features; now, we integrate these into the UI.

Our goal: display a new "Inventory" column in the product list, showing the total stock of all tracked variants.

Key Concepts:

• StoryBDD (Behavior-Driven Development): Using Behat for testing user stories, ensuring accurate implementation of features like inventory management.
• Custom Behat Contexts: Creating and configuring custom context classes within Sylius to handle specific test scenarios.
• Database Integration: Addressing database schema updates and potential connection errors.
• UI Updates: Modifying grids and templates to display inventory data correctly in the Sylius admin panel.

Implementing StoryBDD Tests with Behat:

We create a Behat feature file (features/product/managing_products/browsing_products_with_inventory.feature):

@managing_inventory
Feature: Browsing products with inventory
    In order to manage my shop merchandise
    As an Administrator
    I want to be able to browse products

    Background:
        Given the store operates on a single channel in "United States"
        And the store has a product "Kubus"
        And it comes in the following variations:
            | name          | price     |
            | Kubus Banana  | .00     |
            | Kubus Carrot  | .00     |
        And there are 3 units of "Kubus Banana" variant of product "Kubus" available in the inventory
        And there are 5 units of "Kubus Carrot" variant of product "Kubus" available in the inventory
        And I am logged in as an administrator

    @ui
    Scenario: Browsing defined products with inventory
        Given the "Kubus Banana" product variant is tracked by the inventory
        And the "Kubus Carrot" product variant is tracked by the inventory
        When I want to browse products
        Then I should see that the product "Kubus" has 8 on hand quantity

Running this reveals missing steps. We create a custom context (src/Sylius/Behat/Context/Ui/Admin/ManagingProductsInventoryContext.php):

<?php
// ... (imports) ...

class ManagingProductsInventoryContext implements Context
{
    // ... (IndexPageInterface injection and methods) ...
}

We configure this context in src/Sylius/Behat/Resources/config/services/contexts/ui.xml and src/Sylius/Behat/Resources/config/suites/ui/inventory/managing_inventory.yml. Database setup (doctrine:database:create, doctrine:schema:create, doctrine:schema:update) might be necessary.

Implementing the missing steps involves using Sylius's IndexPageInterface to interact with the product list and assertions to verify the inventory column's presence and data. We also need to update the Sylius Grid configuration (app/Resources/SyliusAdminBundle/config/grids/product.yml) to add the "inventory" column and create a custom template (app/Resources/SyliusAdminBundle/views/ProductVariant/Grid/Field/inventory.html.twig) to display the inventory information with color-coded indicators (green for sufficient stock, yellow for low stock, red for out of stock).

Finally, we extend the product variant form to allow modification of reorder levels. This involves creating a form extension (src/AppBundle/Form/Type/Extension/ProductVariantTypeExtension.php), configuring it as a service (src/AppBundle/Resources/config/services.yml), and updating the relevant template (app/Resources/SyliusAdminBundle/views/ProductVariant/Tab/_details.html.twig).

Conclusion:

This process demonstrates a robust approach to extending Sylius while maintaining high test coverage. The use of StoryBDD and custom Behat contexts ensures that new features are thoroughly tested and integrated seamlessly into the existing platform. Remember to clear caches after making changes to configuration files.

(Frequently Asked Questions section omitted for brevity, as it's largely unrelated to the core code and modifications described.)

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