Database fixtures considered harmful.

#### An article about better test fixtures
* `dependencies` can turn `stories` **business objects** into pytest fixtures.
* We will write better tests because our database fills up logic **does not duplicate** in `FactoryBoy`.
* `@value` decorator can be used to return normal results from the factories.
```python
@register
class SubmitCodeFixture(SubmitCode):

name = 'submit_code'

@value
def fixture(submit_code, user, token):
return submit_code(user, token)

user = require('request_code')

token = Faker('uuid')
```
* **profit**: Tests coupled with business logic will fail if this logic changes. On the other side, we'll need to change each `FactoryBoy` usage in our test suite to mirror actual behavior.