Add skeleton app with namespaces

.gitignore

@@ -119,4 +119,4 @@ venv.bak/
 misc/
 .Rproj.user
 
-fte/app-test.db
+app/app-test.db

README.md

@@ -1,7 +1,3 @@
-# flask_testing_examples
+# flask_api_example
 
-A collection of examples for testing Flask applications
-
-## Running the tests
-
-All tests in this repository can be run by installing PyTest with `pip install pytest` and invoking the command `pytest`
+A sample project showing how to build a scalable, maintainable, modular Flask API with a heavy emphasis on testing.

app/__init__.py

@@ -1,14 +1,19 @@
 from flask import Flask, jsonify
 from flask_sqlalchemy import SQLAlchemy
+from flask_restplus import Api
 
 db = SQLAlchemy()
 
 
 def create_app(env=None):
-    from fte.config import config_by_name
+    from app.config import config_by_name
+    from app.routes import register_routes
+
     app = Flask(__name__)
     app.config.from_object(config_by_name[env or 'test'])
+    api = Api(app, title='Flaskerific API', version='0.1.0')
 
+    register_routes(api, app)
     db.init_app(app)
 
     @app.route('/health')

app/__init__test.py

@@ -1,4 +1,4 @@
-from fte.test.fixtures import app, client  # noqa
+from app.test.fixtures import app, client  # noqa
 
 
 def test_app_creates(app):  # noqa
@@ -6,7 +6,6 @@ def test_app_creates(app):  # noqa
 
 
 def test_app_healthy(app, client):  # noqa
-    #with app.app_context():
     with client:
         resp = client.get('/health')
         assert resp.status_code == 200

app/client/requests_test.py

@@ -1,16 +0,0 @@
-from fte import create_app
-from fte.decorators import accepts
-
-from fte.test.fixtures import app, client  # noqa
-
-
-def test_reqparse(app):
-    @app.route('/hello_world')
-    def respond():
-        from flask import jsonify
-        return jsonify('Hello, World')
-    with app.test_client() as cl:
-        response = cl.get('/hello_world')
-
-        assert response.status_code == 200
-        assert response.json == 'Hello, World'

app/config.py

@@ -1,18 +1,22 @@
 import os
+from typing import List, Type
 
 basedir = os.path.abspath(os.path.dirname(__file__))
 
 
 class BaseConfig:
+    CONFIG_NAME = 'base'
     USE_MOCK_EQUIVALENCY = False
     DEBUG = False
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
 
 
 class DevelopmentConfig(BaseConfig):
     CONFIG_NAME = 'dev'
     SECRET_KEY = os.getenv(
-        "DEV_SECRET_KEY", "You can't see California without Marlon Brando's eyes")
+        "DEV_SECRET_KEY", "You can't see California without Marlon Widgeto's eyes")
     DEBUG = True
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
     TESTING = False
     SQLALCHEMY_DATABASE_URI = "sqlite:///{0}/app-dev.db".format(basedir)
 
@@ -21,6 +25,7 @@ class TestingConfig(BaseConfig):
     CONFIG_NAME = 'test'
     SECRET_KEY = os.getenv("TEST_SECRET_KEY", "Thanos did nothing wrong")
     DEBUG = True
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
     TESTING = True
     SQLALCHEMY_DATABASE_URI = "sqlite:///{0}/app-test.db".format(basedir)
 
@@ -29,9 +34,11 @@ class ProductionConfig(BaseConfig):
     CONFIG_NAME = 'prod'
     SECRET_KEY = os.getenv("PROD_SECRET_KEY", "I'm Ron Burgundy?")
     DEBUG = False
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
     TESTING = False
     SQLALCHEMY_DATABASE_URI = "sqlite:///{0}/app-prod.db".format(basedir)
 
 
-EXPORT_CONFIGS = [DevelopmentConfig, TestingConfig, ProductionConfig]
+EXPORT_CONFIGS: List[Type[BaseConfig]] = [
+    DevelopmentConfig, TestingConfig, ProductionConfig]
 config_by_name = {cfg.CONFIG_NAME: cfg for cfg in EXPORT_CONFIGS}

app/fizz/__init__.py

@@ -0,0 +1,10 @@
+BASE_ROUTE = 'fizz'
+
+
+def register_routes(root_api, root='api'):
+    from .fizzbar.controller import api as fizzbar_api
+    from .fizzbaz.controller import api as fizzbaz_api
+
+    root_api.add_namespace(fizzbar_api, path=f'/{root}/{BASE_ROUTE}/fizzbar')
+    root_api.add_namespace(fizzbaz_api, path=f'/{root}/{BASE_ROUTE}/fizzbaz')
+    return root_api

app/fizz/fizzbar/__init__.py

@@ -0,0 +1,2 @@
+from .model import Fizzbar  # noqa
+from .schema import FizzbarSchema  # noqa

app/fizz/fizzbar/controller.py

@@ -0,0 +1,56 @@
+from flask import request
+from flask_accepts import accepts, responds
+from flask_restplus import Namespace, Resource
+from flask.wrappers import Response
+from typing import List
+
+from .schema import FizzbarSchema
+from .service import FizzbarService
+from .model import Fizzbar
+from .interface import FizzbarInterface
+
+api = Namespace('Fizzbar', description='A modular namespace within fizz')  # noqa
+
+
+@api.route('/')
+class FizzbarResource(Resource):
+    '''Fizzbars'''
+
+    @responds(schema=FizzbarSchema, many=True)
+    def get(self) -> List[Fizzbar]:
+        '''Get all Fizzbars'''
+
+        return FizzbarService.get_all()
+
+    @accepts(schema=FizzbarSchema, api=api)
+    @responds(schema=FizzbarSchema)
+    def post(self) -> Fizzbar:
+        '''Create a Single Fizzbar'''
+
+        return FizzbarService.create(request.parsed_obj)
+
+
+@api.route('/<int:fizzbarId>')
+@api.param('fizzbarId', 'Fizzbar database ID')
+class FizzbarIdResource(Resource):
+    @responds(schema=FizzbarSchema)
+    def get(self, fizzbarId: int) -> Fizzbar:
+        '''Get Single Fizzbar'''
+
+        return FizzbarService.get_by_id(fizzbarId)
+
+    def delete(self, fizzbarId: int) -> Response:
+        '''Delete Single Fizzbar'''
+        from flask import jsonify
+        print('fizzbarId = ', fizzbarId)
+        id = FizzbarService.delete_by_id(fizzbarId)
+        return jsonify(dict(status='Success', id=id))
+
+    @accepts(schema=FizzbarSchema, api=api)
+    @responds(schema=FizzbarSchema)
+    def put(self, fizzbarId: int) -> Fizzbar:
+        '''Update Single Fizzbar'''
+
+        changes: FizzbarInterface = request.parsed_obj
+        Fizzbar = FizzbarService.get_by_id(fizzbarId)
+        return FizzbarService.update(Fizzbar, changes)

app/fizz/fizzbar/controller_test.py

@@ -0,0 +1,84 @@
+
+from unittest.mock import patch
+from flask.testing import FlaskClient
+
+from app.test.fixtures import client, app  # noqa
+from .service import FizzbarService
+from .schema import FizzbarSchema
+from .model import Fizzbar
+from .interface import FizzbarInterface
+from .. import BASE_ROUTE
+
+
+def make_fizzbar(id: int = 123, name: str = 'Test fizzbar',
+                 purpose: str = 'Test purpose') -> Fizzbar:
+    return Fizzbar(
+        fizzbar_id=id, name=name, purpose=purpose
+    )
+
+
+class TestFizzbarResource:
+    @patch.object(FizzbarService, 'get_all',
+                  lambda: [make_fizzbar(123, name='Test Fizzbar 1'),
+                           make_fizzbar(456, name='Test Fizzbar 2')])
+    def test_get(self, client: FlaskClient):  # noqa
+        with client:
+            results = client.get(f'/api/{BASE_ROUTE}/fizzbar',
+                                 follow_redirects=True).get_json()
+            expected = FizzbarSchema(many=True).dump(
+                [make_fizzbar(123, name='Test Fizzbar 1'),
+                 make_fizzbar(456, name='Test Fizzbar 2')]
+            ).data
+            for r in results:
+                assert r in expected
+
+    @patch.object(FizzbarService, 'create',
+                  lambda create_request: Fizzbar(**create_request))
+    def test_post(self, client: FlaskClient):  # noqa
+        with client:
+
+            payload = dict(name='Test fizzbar', purpose='Test purpose')
+            result = client.post(f'/api/{BASE_ROUTE}/fizzbar/', json=payload).get_json()
+            expected = FizzbarSchema().dump(Fizzbar(
+                name=payload['name'],
+                purpose=payload['purpose'],
+            )).data
+            assert result == expected
+
+
+def fake_update(fizzbar: Fizzbar, changes: FizzbarInterface) -> Fizzbar:
+    # To fake an update, just return a new object
+    updated_Fizzbar = Fizzbar(fizzbar_id=fizzbar.fizzbar_id,
+                              name=changes['name'],
+                              purpose=changes['purpose'])
+    return updated_Fizzbar
+
+
+class TestFizzbarIdResource:
+    @patch.object(FizzbarService, 'get_by_id',
+                  lambda id: make_fizzbar(id=id))
+    def test_get(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.get(f'/api/{BASE_ROUTE}/fizzbar/123').get_json()
+            expected = Fizzbar(fizzbar_id=123)
+            assert result['fizzbarId'] == expected.fizzbar_id
+
+    @patch.object(FizzbarService, 'delete_by_id',
+                  lambda id: [id])
+    def test_delete(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.delete(f'/api/{BASE_ROUTE}/fizzbar/123').get_json()
+            expected = dict(status='Success', id=[123])
+            assert result == expected
+
+    @patch.object(FizzbarService, 'get_by_id',
+                  lambda id: make_fizzbar(id=id))
+    @patch.object(FizzbarService, 'update', fake_update)
+    def test_put(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.put(f'/api/{BASE_ROUTE}/fizzbar/123',
+                                json={'name': 'New Fizzbar',
+                                      'purpose': 'New purpose'}).get_json()
+            expected = FizzbarSchema().dump(
+                Fizzbar(fizzbar_id=123, name='New Fizzbar', purpose='New purpose')).data
+            assert result == expected

app/fizz/fizzbar/interface.py

@@ -0,0 +1,7 @@
+from mypy_extensions import TypedDict
+
+
+class FizzbarInterface(TypedDict, total=False):
+    fizzbar_id: int
+    name: str
+    purpose: str

app/fizz/fizzbar/model.py

@@ -0,0 +1,19 @@
+from sqlalchemy import Integer, Column, String
+from app import db  # noqa
+from .interface import FizzbarInterface
+from typing import Any
+
+
+class Fizzbar(db.Model):  # type: ignore
+    '''A snazzy Fizzbar'''
+
+    __tablename__ = 'fizzbar'
+
+    fizzbar_id = Column(Integer(), primary_key=True)
+    name = Column(String(255))
+    purpose = Column(String(255))
+
+    def update(self, changes: FizzbarInterface):
+        for key, val in changes.items():
+            setattr(self, key, val)
+        return self

app/fizz/fizzbar/model_test.py

@@ -0,0 +1,22 @@
+from pytest import fixture
+from flask_sqlalchemy import SQLAlchemy
+from app.test.fixtures import app, db  # noqa
+from .model import Fizzbar
+
+
+@fixture
+def fizzbar() -> Fizzbar:
+    return Fizzbar(
+        fizzbar_id=1, name='Test fizzbar', purpose='Test purpose'
+    )
+
+
+def test_Fizzbar_create(fizzbar: Fizzbar):
+    assert fizzbar
+
+
+def test_Fizzbar_retrieve(fizzbar: Fizzbar, db: SQLAlchemy):  # noqa
+    db.session.add(fizzbar)
+    db.session.commit()
+    s = Fizzbar.query.first()
+    assert s.__dict__ == fizzbar.__dict__

app/fizz/fizzbar/schema.py

@@ -0,0 +1,9 @@
+from marshmallow import fields, Schema
+
+
+class FizzbarSchema(Schema):
+    '''Fizzbar schema'''
+
+    fizzbarId = fields.Number(attribute='fizzbar_id')
+    name = fields.String(attribute='name')
+    purpose = fields.String(attribute='purpose')

app/fizz/fizzbar/service.py

@@ -0,0 +1,41 @@
+from app import db
+from typing import List
+from .model import Fizzbar
+from .interface import FizzbarInterface
+
+
+class FizzbarService():
+    @staticmethod
+    def get_all() -> List[Fizzbar]:
+        return Fizzbar.query.all()
+
+    @staticmethod
+    def get_by_id(fizzbar_id: int) -> Fizzbar:
+        return Fizzbar.query.get(fizzbar_id)
+
+    @staticmethod
+    def update(fizzbar: Fizzbar, Fizzbar_change_updates: FizzbarInterface) -> Fizzbar:
+        fizzbar.update(Fizzbar_change_updates)
+        db.session.commit()
+        return fizzbar
+
+    @staticmethod
+    def delete_by_id(fizzbar_id: int) -> List[int]:
+        fizzbar = Fizzbar.query.filter(Fizzbar.fizzbar_id == fizzbar_id).first()
+        if not fizzbar:
+            return []
+        db.session.delete(fizzbar)
+        db.session.commit()
+        return [fizzbar_id]
+
+    @staticmethod
+    def create(new_attrs: FizzbarInterface) -> Fizzbar:
+        new_fizzbar = Fizzbar(
+            name=new_attrs['name'],
+            purpose=new_attrs['purpose']
+        )
+
+        db.session.add(new_fizzbar)
+        db.session.commit()
+
+        return new_fizzbar

app/fizz/fizzbar/service_test.py

@@ -0,0 +1,60 @@
+from flask_sqlalchemy import SQLAlchemy
+from typing import List
+from app.test.fixtures import app, db  # noqa
+from .model import Fizzbar
+from .service import FizzbarService  # noqa
+from .interface import FizzbarInterface
+
+
+def test_get_all(db: SQLAlchemy):  # noqa
+    yin: Fizzbar = Fizzbar(fizzbar_id=1, name='Yin', purpose='thing 1')
+    yang: Fizzbar = Fizzbar(fizzbar_id=2, name='Yang', purpose='thing 2')
+    db.session.add(yin)
+    db.session.add(yang)
+    db.session.commit()
+
+    results: List[Fizzbar] = FizzbarService.get_all()
+
+    assert len(results) == 2
+    assert yin in results and yang in results
+
+
+def test_update(db: SQLAlchemy):  # noqa
+    yin: Fizzbar = Fizzbar(fizzbar_id=1, name='Yin', purpose='thing 1')
+
+    db.session.add(yin)
+    db.session.commit()
+    updates: FizzbarInterface = dict(name='New Fizzbar name')
+
+    FizzbarService.update(yin, updates)
+
+    result: Fizzbar = Fizzbar.query.get(yin.fizzbar_id)
+    assert result.name == 'New Fizzbar name'
+
+
+def test_delete_by_id(db: SQLAlchemy):  # noqa
+    yin: Fizzbar = Fizzbar(fizzbar_id=1, name='Yin', purpose='thing 1')
+    yang: Fizzbar = Fizzbar(fizzbar_id=2, name='Yang', purpose='thing 2')
+    db.session.add(yin)
+    db.session.add(yang)
+    db.session.commit()
+
+    FizzbarService.delete_by_id(1)
+    db.session.commit()
+
+    results: List[Fizzbar] = Fizzbar.query.all()
+
+    assert len(results) == 1
+    assert yin not in results and yang in results
+
+
+def test_create(db: SQLAlchemy):  # noqa
+
+    yin: FizzbarInterface = dict(name='Fancy new fizzbar', purpose='Fancy new purpose')
+    FizzbarService.create(yin)
+    results: List[Fizzbar] = Fizzbar.query.all()
+
+    assert len(results) == 1
+
+    for k in yin.keys():
+        assert getattr(results[0], k) == yin[k]

app/fizz/fizzbaz/__init__.py

@@ -0,0 +1,2 @@
+from .model import Fizzbaz  # noqa
+from .schema import FizzbazSchema  # noqa

app/fizz/fizzbaz/controller.py

@@ -0,0 +1,56 @@
+from flask import request
+from flask_accepts import accepts, responds
+from flask_restplus import Namespace, Resource
+from flask.wrappers import Response
+from typing import List
+
+from .schema import FizzbazSchema
+from .service import FizzbazService
+from .model import Fizzbaz
+from .interface import FizzbazInterface
+
+api = Namespace('Fizzbaz', description='A modular namespace within fizz')  # noqa
+
+
+@api.route('/')
+class FizzbazResource(Resource):
+    '''Fizzbazs'''
+
+    @responds(schema=FizzbazSchema, many=True)
+    def get(self) -> List[Fizzbaz]:
+        '''Get all Fizzbazs'''
+
+        return FizzbazService.get_all()
+
+    @accepts(schema=FizzbazSchema, api=api)
+    @responds(schema=FizzbazSchema)
+    def post(self) -> Fizzbaz:
+        '''Create a Single Fizzbaz'''
+
+        return FizzbazService.create(request.parsed_obj)
+
+
+@api.route('/<int:fizzbazId>')
+@api.param('fizzbazId', 'Fizzbaz database ID')
+class FizzbazIdResource(Resource):
+    @responds(schema=FizzbazSchema)
+    def get(self, fizzbazId: int) -> Fizzbaz:
+        '''Get Single Fizzbaz'''
+
+        return FizzbazService.get_by_id(fizzbazId)
+
+    def delete(self, fizzbazId: int) -> Response:
+        '''Delete Single Fizzbaz'''
+        from flask import jsonify
+
+        id = FizzbazService.delete_by_id(fizzbazId)
+        return jsonify(dict(status='Success', id=id))
+
+    @accepts(schema=FizzbazSchema, api=api)
+    @responds(schema=FizzbazSchema)
+    def put(self, fizzbazId: int) -> Fizzbaz:
+        '''Update Single Fizzbaz'''
+
+        changes: FizzbazInterface = request.parsed_obj
+        Fizzbaz = FizzbazService.get_by_id(fizzbazId)
+        return FizzbazService.update(Fizzbaz, changes)

app/fizz/fizzbaz/controller_test.py

@@ -0,0 +1,84 @@
+
+from unittest.mock import patch
+from flask.testing import FlaskClient
+
+from app.test.fixtures import client, app  # noqa
+from .service import FizzbazService
+from .schema import FizzbazSchema
+from .model import Fizzbaz
+from .interface import FizzbazInterface
+from .. import BASE_ROUTE
+
+
+def make_fizzbaz(id: int = 123, name: str = 'Test fizzbaz',
+                 purpose: str = 'Test purpose') -> Fizzbaz:
+    return Fizzbaz(
+        fizzbaz_id=id, name=name, purpose=purpose
+    )
+
+
+class TestFizzbazResource:
+    @patch.object(FizzbazService, 'get_all',
+                  lambda: [make_fizzbaz(123, name='Test Fizzbaz 1'),
+                           make_fizzbaz(456, name='Test Fizzbaz 2')])
+    def test_get(self, client: FlaskClient):  # noqa
+        with client:
+            results = client.get(f'/api/{BASE_ROUTE}/fizzbaz',
+                                 follow_redirects=True).get_json()
+            expected = FizzbazSchema(many=True).dump(
+                [make_fizzbaz(123, name='Test Fizzbaz 1'),
+                 make_fizzbaz(456, name='Test Fizzbaz 2')]
+            ).data
+            for r in results:
+                assert r in expected
+
+    @patch.object(FizzbazService, 'create',
+                  lambda create_request: Fizzbaz(**create_request))
+    def test_post(self, client: FlaskClient):  # noqa
+        with client:
+
+            payload = dict(name='Test fizzbaz', purpose='Test purpose')
+            result = client.post(f'/api/{BASE_ROUTE}/fizzbaz/', json=payload).get_json()
+            expected = FizzbazSchema().dump(Fizzbaz(
+                name=payload['name'],
+                purpose=payload['purpose'],
+            )).data
+            assert result == expected
+
+
+def fake_update(fizzbaz: Fizzbaz, changes: FizzbazInterface) -> Fizzbaz:
+    # To fake an update, just return a new object
+    updated_Fizzbaz = Fizzbaz(fizzbaz_id=fizzbaz.fizzbaz_id,
+                              name=changes['name'],
+                              purpose=changes['purpose'])
+    return updated_Fizzbaz
+
+
+class TestFizzbazIdResource:
+    @patch.object(FizzbazService, 'get_by_id',
+                  lambda id: make_fizzbaz(id=id))
+    def test_get(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.get(f'/api/{BASE_ROUTE}/fizzbaz/123').get_json()
+            expected = Fizzbaz(fizzbaz_id=123)
+            assert result['fizzbazId'] == expected.fizzbaz_id
+
+    @patch.object(FizzbazService, 'delete_by_id',
+                  lambda id: [id])
+    def test_delete(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.delete(f'/api/{BASE_ROUTE}/fizzbaz/123').get_json()
+            expected = dict(status='Success', id=[123])
+            assert result == expected
+
+    @patch.object(FizzbazService, 'get_by_id',
+                  lambda id: make_fizzbaz(id=id))
+    @patch.object(FizzbazService, 'update', fake_update)
+    def test_put(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.put(f'/api/{BASE_ROUTE}/fizzbaz/123',
+                                json={'name': 'New Fizzbaz',
+                                      'purpose': 'New purpose'}).get_json()
+            expected = FizzbazSchema().dump(
+                Fizzbaz(fizzbaz_id=123, name='New Fizzbaz', purpose='New purpose')).data
+            assert result == expected

app/fizz/fizzbaz/interface.py

@@ -0,0 +1,7 @@
+from mypy_extensions import TypedDict
+
+
+class FizzbazInterface(TypedDict, total=False):
+    fizzbaz_id: int
+    name: str
+    purpose: str

app/fizz/fizzbaz/model.py

@@ -0,0 +1,19 @@
+from sqlalchemy import Integer, Column, String
+from app import db  # noqa
+from .interface import FizzbazInterface
+from typing import Any
+
+
+class Fizzbaz(db.Model):  # type: ignore
+    '''A snazzy Fizzbaz'''
+
+    __tablename__ = 'fizzbaz'
+
+    fizzbaz_id = Column(Integer(), primary_key=True)
+    name = Column(String(255))
+    purpose = Column(String(255))
+
+    def update(self, changes: FizzbazInterface):
+        for key, val in changes.items():
+            setattr(self, key, val)
+        return self

app/fizz/fizzbaz/model_test.py

@@ -0,0 +1,22 @@
+from pytest import fixture
+from flask_sqlalchemy import SQLAlchemy
+from app.test.fixtures import app, db  # noqa
+from .model import Fizzbaz
+
+
+@fixture
+def fizzbaz() -> Fizzbaz:
+    return Fizzbaz(
+        fizzbaz_id=1, name='Test fizzbaz', purpose='Test purpose'
+    )
+
+
+def test_Fizzbaz_create(fizzbaz: Fizzbaz):
+    assert fizzbaz
+
+
+def test_Fizzbaz_retrieve(fizzbaz: Fizzbaz, db: SQLAlchemy):  # noqa
+    db.session.add(fizzbaz)
+    db.session.commit()
+    s = Fizzbaz.query.first()
+    assert s.__dict__ == fizzbaz.__dict__

app/fizz/fizzbaz/schema.py

@@ -0,0 +1,9 @@
+from marshmallow import fields, Schema
+
+
+class FizzbazSchema(Schema):
+    '''Fizzbaz schema'''
+
+    fizzbazId = fields.Number(attribute='fizzbaz_id')
+    name = fields.String(attribute='name')
+    purpose = fields.String(attribute='purpose')

app/fizz/fizzbaz/service.py

@@ -0,0 +1,41 @@
+from app import db
+from typing import List
+from .model import Fizzbaz
+from .interface import FizzbazInterface
+
+
+class FizzbazService():
+    @staticmethod
+    def get_all() -> List[Fizzbaz]:
+        return Fizzbaz.query.all()
+
+    @staticmethod
+    def get_by_id(fizzbaz_id: int) -> Fizzbaz:
+        return Fizzbaz.query.get(fizzbaz_id)
+
+    @staticmethod
+    def update(fizzbaz: Fizzbaz, Fizzbaz_change_updates: FizzbazInterface) -> Fizzbaz:
+        fizzbaz.update(Fizzbaz_change_updates)
+        db.session.commit()
+        return fizzbaz
+
+    @staticmethod
+    def delete_by_id(fizzbaz_id: int) -> List[int]:
+        fizzbaz = Fizzbaz.query.filter(Fizzbaz.fizzbaz_id == fizzbaz_id).first()
+        if not fizzbaz:
+            return []
+        db.session.delete(fizzbaz)
+        db.session.commit()
+        return [fizzbaz_id]
+
+    @staticmethod
+    def create(new_attrs: FizzbazInterface) -> Fizzbaz:
+        new_fizzbaz = Fizzbaz(
+            name=new_attrs['name'],
+            purpose=new_attrs['purpose']
+        )
+
+        db.session.add(new_fizzbaz)
+        db.session.commit()
+
+        return new_fizzbaz

app/fizz/fizzbaz/service_test.py

@@ -0,0 +1,60 @@
+from flask_sqlalchemy import SQLAlchemy
+from typing import List
+from app.test.fixtures import app, db  # noqa
+from .model import Fizzbaz
+from .service import FizzbazService  # noqa
+from .interface import FizzbazInterface
+
+
+def test_get_all(db: SQLAlchemy):  # noqa
+    yin: Fizzbaz = Fizzbaz(fizzbaz_id=1, name='Yin', purpose='thing 1')
+    yang: Fizzbaz = Fizzbaz(fizzbaz_id=2, name='Yang', purpose='thing 2')
+    db.session.add(yin)
+    db.session.add(yang)
+    db.session.commit()
+
+    results: List[Fizzbaz] = FizzbazService.get_all()
+
+    assert len(results) == 2
+    assert yin in results and yang in results
+
+
+def test_update(db: SQLAlchemy):  # noqa
+    yin: Fizzbaz = Fizzbaz(fizzbaz_id=1, name='Yin', purpose='thing 1')
+
+    db.session.add(yin)
+    db.session.commit()
+    updates: FizzbazInterface = dict(name='New Fizzbaz name')
+
+    FizzbazService.update(yin, updates)
+
+    result: Fizzbaz = Fizzbaz.query.get(yin.fizzbaz_id)
+    assert result.name == 'New Fizzbaz name'
+
+
+def test_delete_by_id(db: SQLAlchemy):  # noqa
+    yin: Fizzbaz = Fizzbaz(fizzbaz_id=1, name='Yin', purpose='thing 1')
+    yang: Fizzbaz = Fizzbaz(fizzbaz_id=2, name='Yang', purpose='thing 2')
+    db.session.add(yin)
+    db.session.add(yang)
+    db.session.commit()
+
+    FizzbazService.delete_by_id(1)
+    db.session.commit()
+
+    results: List[Fizzbaz] = Fizzbaz.query.all()
+
+    assert len(results) == 1
+    assert yin not in results and yang in results
+
+
+def test_create(db: SQLAlchemy):  # noqa
+
+    yin: FizzbazInterface = dict(name='Fancy new fizzbaz', purpose='Fancy new purpose')
+    FizzbazService.create(yin)
+    results: List[Fizzbaz] = Fizzbaz.query.all()
+
+    assert len(results) == 1
+
+    for k in yin.keys():
+        assert getattr(results[0], k) == yin[k]

app/routes.py

@@ -0,0 +1,7 @@
+def register_routes(api, app, root='api'):
+    from app.widget import register_routes as attach_widget
+    from app.fizz import register_routes as attach_fizz
+
+    # Add routes
+    attach_widget(api)
+    attach_fizz(api)

app/test/fixtures.py

@@ -1,6 +1,6 @@
 import pytest
 
-from fte import create_app
+from app import create_app
 
 
 @pytest.fixture
@@ -15,7 +15,7 @@ def client(app):
 
 @pytest.fixture
 def db(app):
-    from fte import db
+    from app import db
     with app.app_context():
         db.create_all()
         yield db

app/widget/__init__.py

@@ -0,0 +1,9 @@
+from .model import Widget  # noqa
+from .schema import WidgetSchema  # noqa
+BASE_ROUTE = 'widget'
+
+
+def register_routes(root_api, root='api'):
+    from .controller import api as widget_api
+    root_api.add_namespace(widget_api, path=f'/{root}/{BASE_ROUTE}')
+    return root_api

app/widget/controller.py

@@ -0,0 +1,56 @@
+from flask import request
+from flask_accepts import accepts, responds
+from flask_restplus import Namespace, Resource
+from flask.wrappers import Response
+from typing import List
+
+from .schema import WidgetSchema
+from .service import WidgetService
+from .model import Widget
+from .interface import WidgetInterface
+
+api = Namespace('Widget', description='Single namespace, single entity')  # noqa
+
+
+@api.route('/')
+class WidgetResource(Resource):
+    '''Widgets'''
+
+    @responds(schema=WidgetSchema, many=True)
+    def get(self) -> List[Widget]:
+        '''Get all Widgets'''
+
+        return WidgetService.get_all()
+
+    @accepts(schema=WidgetSchema, api=api)
+    @responds(schema=WidgetSchema)
+    def post(self) -> Widget:
+        '''Create a Single Widget'''
+
+        return WidgetService.create(request.parsed_obj)
+
+
+@api.route('/<int:widgetId>')
+@api.param('widgetId', 'Widget database ID')
+class WidgetIdResource(Resource):
+    @responds(schema=WidgetSchema)
+    def get(self, widgetId: int) -> Widget:
+        '''Get Single Widget'''
+
+        return WidgetService.get_by_id(widgetId)
+
+    def delete(self, widgetId: int) -> Response:
+        '''Delete Single Widget'''
+        from flask import jsonify
+
+        id = WidgetService.delete_by_id(widgetId)
+        return jsonify(dict(status='Success', id=id))
+
+    @accepts(schema=WidgetSchema, api=api)
+    @responds(schema=WidgetSchema)
+    def put(self, widgetId: int) -> Widget:
+        '''Update Single Widget'''
+
+        changes: WidgetInterface = request.parsed_obj
+        Widget = WidgetService.get_by_id(widgetId)
+        return WidgetService.update(Widget, changes)

app/widget/controller_test.py

@@ -0,0 +1,85 @@
+
+from unittest.mock import patch
+from flask.testing import FlaskClient
+
+from app.test.fixtures import client, app  # noqa
+from .service import WidgetService
+from .schema import WidgetSchema
+from .model import Widget
+from .interface import WidgetInterface
+from . import BASE_ROUTE
+
+
+def make_widget(id: int = 123, name: str = 'Test widget',
+                purpose: str = 'Test purpose') -> Widget:
+    return Widget(
+        widget_id=id, name=name, purpose=purpose
+    )
+
+
+class TestWidgetResource:
+    @patch.object(WidgetService, 'get_all',
+                  lambda: [make_widget(123, name='Test Widget 1'),
+                           make_widget(456, name='Test Widget 2')])
+    def test_get(self, client: FlaskClient):  # noqa
+        with client:
+            results = client.get(f'/api/{BASE_ROUTE}',
+                                 follow_redirects=True).get_json()
+            expected = WidgetSchema(many=True).dump(
+                [make_widget(123, name='Test Widget 1'),
+                 make_widget(456, name='Test Widget 2')]
+            ).data
+            for r in results:
+                assert r in expected
+
+    @patch.object(WidgetService, 'create',
+                  lambda create_request: Widget(**create_request))
+    def test_post(self, client: FlaskClient):  # noqa
+        with client:
+
+            payload = dict(name='Test widget', purpose='Test purpose')
+            result = client.post(f'/api/{BASE_ROUTE}/', json=payload).get_json()
+            expected = WidgetSchema().dump(Widget(
+                name=payload['name'],
+                purpose=payload['purpose'],
+            )).data
+            assert result == expected
+
+
+def fake_update(widget: Widget, changes: WidgetInterface) -> Widget:
+    # To fake an update, just return a new object
+    updated_Widget = Widget(widget_id=widget.widget_id,
+                            name=changes['name'],
+                            purpose=changes['purpose'])
+    return updated_Widget
+
+
+class TestWidgetIdResource:
+    @patch.object(WidgetService, 'get_by_id',
+                  lambda id: make_widget(id=id))
+    def test_get(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.get(f'/api/{BASE_ROUTE}/123').get_json()
+            expected = make_widget(id=123)
+            print(f'result = ', result)
+            assert result['widgetId'] == expected.widget_id
+
+    @patch.object(WidgetService, 'delete_by_id',
+                  lambda id: id)
+    def test_delete(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.delete(f'/api/{BASE_ROUTE}/123').get_json()
+            expected = dict(status='Success', id=123)
+            assert result == expected
+
+    @patch.object(WidgetService, 'get_by_id',
+                  lambda id: make_widget(id=id))
+    @patch.object(WidgetService, 'update', fake_update)
+    def test_put(self, client: FlaskClient):  # noqa
+        with client:
+            result = client.put(f'/api/{BASE_ROUTE}/123',
+                                json={'name': 'New Widget',
+                                      'purpose': 'New purpose'}).get_json()
+            expected = WidgetSchema().dump(
+                Widget(widget_id=123, name='New Widget', purpose='New purpose')).data
+            assert result == expected

app/widget/interface.py

@@ -0,0 +1,7 @@
+from mypy_extensions import TypedDict
+
+
+class WidgetInterface(TypedDict, total=False):
+    widget_id: int
+    name: str
+    purpose: str

app/widget/model.py

@@ -0,0 +1,19 @@
+from sqlalchemy import Integer, Column, String
+from app import db  # noqa
+from .interface import WidgetInterface
+from typing import Any
+
+
+class Widget(db.Model):  # type: ignore
+    '''A snazzy Widget'''
+
+    __tablename__ = 'widget'
+
+    widget_id = Column(Integer(), primary_key=True)
+    name = Column(String(255))
+    purpose = Column(String(255))
+
+    def update(self, changes: WidgetInterface):
+        for key, val in changes.items():
+            setattr(self, key, val)
+        return self

app/widget/model_test.py

@@ -0,0 +1,22 @@
+from pytest import fixture
+from flask_sqlalchemy import SQLAlchemy
+from app.test.fixtures import app, db  # noqa
+from .model import Widget
+
+
+@fixture
+def widget() -> Widget:
+    return Widget(
+        widget_id=1, name='Test widget', purpose='Test purpose'
+    )
+
+
+def test_Widget_create(widget: Widget):
+    assert widget
+
+
+def test_Widget_retrieve(widget: Widget, db: SQLAlchemy):  # noqa
+    db.session.add(widget)
+    db.session.commit()
+    s = Widget.query.first()
+    assert s.__dict__ == widget.__dict__

app/widget/schema.py

@@ -0,0 +1,9 @@
+from marshmallow import fields, Schema
+
+
+class WidgetSchema(Schema):
+    '''Widget schema'''
+
+    widgetId = fields.Number(attribute='widget_id')
+    name = fields.String(attribute='name')
+    purpose = fields.String(attribute='purpose')

app/widget/service.py

@@ -0,0 +1,41 @@
+from app import db
+from typing import List
+from .model import Widget
+from .interface import WidgetInterface
+
+
+class WidgetService():
+    @staticmethod
+    def get_all() -> List[Widget]:
+        return Widget.query.all()
+
+    @staticmethod
+    def get_by_id(widget_id: int) -> Widget:
+        return Widget.query.get(widget_id)
+
+    @staticmethod
+    def update(widget: Widget, Widget_change_updates: WidgetInterface) -> Widget:
+        widget.update(Widget_change_updates)
+        db.session.commit()
+        return widget
+
+    @staticmethod
+    def delete_by_id(widget_id: int) -> List[int]:
+        widget = Widget.query.filter(Widget.widget_id == widget_id).first()
+        if not widget:
+            return []
+        db.session.delete(widget)
+        db.session.commit()
+        return [widget_id]
+
+    @staticmethod
+    def create(new_attrs: WidgetInterface) -> Widget:
+        new_widget = Widget(
+            name=new_attrs['name'],
+            purpose=new_attrs['purpose']
+        )
+
+        db.session.add(new_widget)
+        db.session.commit()
+
+        return new_widget

app/widget/service_test.py

@@ -0,0 +1,60 @@
+from flask_sqlalchemy import SQLAlchemy
+from typing import List
+from app.test.fixtures import app, db  # noqa
+from .model import Widget
+from .service import WidgetService  # noqa
+from .interface import WidgetInterface
+
+
+def test_get_all(db: SQLAlchemy):  # noqa
+    yin: Widget = Widget(widget_id=1, name='Yin', purpose='thing 1')
+    yang: Widget = Widget(widget_id=2, name='Yang', purpose='thing 2')
+    db.session.add(yin)
+    db.session.add(yang)
+    db.session.commit()
+
+    results: List[Widget] = WidgetService.get_all()
+
+    assert len(results) == 2
+    assert yin in results and yang in results
+
+
+def test_update(db: SQLAlchemy):  # noqa
+    yin: Widget = Widget(widget_id=1, name='Yin', purpose='thing 1')
+
+    db.session.add(yin)
+    db.session.commit()
+    updates: WidgetInterface = dict(name='New Widget name')
+
+    WidgetService.update(yin, updates)
+
+    result: Widget = Widget.query.get(yin.widget_id)
+    assert result.name == 'New Widget name'
+
+
+def test_delete_by_id(db: SQLAlchemy):  # noqa
+    yin: Widget = Widget(widget_id=1, name='Yin', purpose='thing 1')
+    yang: Widget = Widget(widget_id=2, name='Yang', purpose='thing 2')
+    db.session.add(yin)
+    db.session.add(yang)
+    db.session.commit()
+
+    WidgetService.delete_by_id(1)
+    db.session.commit()
+
+    results: List[Widget] = Widget.query.all()
+
+    assert len(results) == 1
+    assert yin not in results and yang in results
+
+
+def test_create(db: SQLAlchemy):  # noqa
+
+    yin: WidgetInterface = dict(name='Fancy new widget', purpose='Fancy new purpose')
+    WidgetService.create(yin)
+    results: List[Widget] = Widget.query.all()
+
+    assert len(results) == 1
+
+    for k in yin.keys():
+        assert getattr(results[0], k) == yin[k]

commands/__init__.py

@@ -0,0 +1,3 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+from .seed_command import SeedCommand

commands/seed_command.py

@@ -0,0 +1,40 @@
+from datetime import datetime
+import pandas as pd
+import numpy as np
+from flask_script import Command
+
+
+from app import db
+
+
+def seed_widgets():
+    from app.widget import Widget
+    widgets = [
+        {
+            'name': 'Pizza Slicer',
+            'purpose': 'Cut delicious pizza',
+        },
+        {
+            'name': 'Rolling Pin',
+            'purpose': 'Roll delicious pizza',
+        },
+        {
+            'name': 'Pizza Oven',
+            'purpose': 'Bake delicious pizza',
+        },
+    ]
+    db.session.bulk_insert_mappings(Widget, widgets)
+
+
+class SeedCommand(Command):
+    """ Seed the DB."""
+
+    def run(self):
+        if input('ARE YOU SURE YOU WANT TO DROP ALL TABLES AND RECREATE? (Y/N)\n'
+                 ).lower() == 'y':
+            print('Dropping tables...')
+            db.drop_all()
+            db.create_all()
+            seed_widgets()
+            db.session.commit()
+            print('Widgets successfully seeded.')

manage.py

@@ -0,0 +1,35 @@
+import os
+from flask_script import Manager
+
+from app import create_app, db
+from commands.seed_command import SeedCommand
+
+env = os.getenv('FLASK_ENV') or 'test'
+print(f'Active environment: * {env} *')
+app = create_app(env)
+
+manager = Manager(app)
+app.app_context().push()
+manager.add_command('seed_db', SeedCommand)
+
+
+@manager.command
+def run():
+    app.run()
+
+
+@manager.command
+def init_db():
+    print('Creating all resources.')
+    db.create_all()
+
+
+@manager.command
+def drop_all():
+    if input('ARE YOU SURE YOU WANT TO DROP ALL TABLES? (Y/N)\n').lower() == 'y':
+        print('Dropping tables...')
+        db.drop_all()
+
+
+if __name__ == '__main__':
+    manager.run()

wsgi.py

@@ -0,0 +1,7 @@
+import os
+
+from app import create_app
+
+app = create_app(os.getenv('FLASK_ENV') or 'test')
+if __name__ == '__main__':
+    app.run(debug=True)