- Route tests
- Service tests
- Model tests
Test HTTP behaviour: status codes, auth gates, response shape.
def test_list_items_requires_auth(client):
response = client.get('/api/items')
assert response.status_code == 401
def test_list_items_when_authenticated(csrf_client, authenticated_user):
response = csrf_client.get('/api/items')
assert response.status_code == 200
assert 'items' in response.json
Test business logic directly, without going through HTTP.
from services import ItemService
from feather.exceptions import ValidationError
import pytest
def test_create_item_validates_name(app):
with app.app_context():
service = ItemService()
with pytest.raises(ValidationError):
service.create(name='') # empty name should fail
def test_create_item_success(app):
with app.app_context():
service = ItemService()
item = service.create(name='Valid Name')
assert item.id is not None
Test the data layer: mixin behaviour, defaults, constraints.
def test_item_defaults(app):
with app.app_context():
item = Item(name='Test')
db.session.add(item)
db.session.commit()
assert item.id is not None
assert item.created_at is not None
Because routes stay thin and services hold the logic, most assertions belong in service
tests. Route tests then only prove the wiring: the right decorator, the right status
code, the right key in the response.