Preparations (Admin Console)

1. go to User Management → Users section
2. create user
3. go to Configuration → Users → General section
4. change Allow new user registration setting value to Immediate
5. save changes
6. go to Website & Content → Structure & Data section
7. go to Products category
8. create Sub Products category
9. create any product in that Sub Products category

Part 1 (Front-End)

1. login
2. add product to cart
3. confirm that current order (created on Front-End) is owned by logged-in user

Part 2 (Front-End)

1. add product to cart
2. login
3. confirm that current order (created on Front-End) is owned by logged-in user

Part 3 (Front-End)

1. register
2. add product to cart
3. confirm that current order (created on Front-End) is owned by logged-in user

Part 4 (Front-End)

1. add product to cart
2. register
3. confirm that current order (created on Front-End) is owned by logged-in user