This project is an exercise in:

• Domain Driven Design
• Test Driven Development
• Pythonic packages and modules
• SQLAlchemy and Alembic integration

Create virtualenv:

# virtualenv virtualenv
# source virtualenv/bin/activate

Install requirements:

# pip install --requirement=requirements.txt

The domain entity groups are:

• Inventory: To track movement of stock
• Sales: Documents which describe purchase orders and invoices containing costs of goods sold
• Products: Details of goods for sale
• Taxons: Hierarchical grouping of products
• Customers: Entities which are able to purchase products and be invoiced

Domain services are:

• Pricing service: Calculate product discounts based on product category and customer discount tier
• Ordering service: Collect orders and acknowledge them
• Delivery service: Aggregate orders from a customer into a delivery
• Invoicing service: Create invoices for deliveries, orders or ad-hoc

Run tests:

# nosetests domain -d -v [--with-coverage --cover-branches --cover-package=domain --cover-html]

Comprised of:

• SQLAlchemy: Database library used to perform all database calls
• alembic: Migrations tool

Run tests:

# nosetests infrastructure -d -v -s

Options available:

• export SQLITE_ECHO=1 for more database engine verbosity
• export SQLITE_IN_MEMORY=1 to run tests on in-memory sqlite instance