Get resources correctly with polymorphic

ereuse_devicehub/client.py

@@ -1,7 +1,11 @@
+from typing import Type, Union
+
+from boltons.typeutils import issubclass
 from ereuse_utils.test import JSON
 from flask import Response
 from werkzeug.exceptions import HTTPException
 
+from ereuse_devicehub.resources.models import Thing
 from teal.client import Client as TealClient
 
 
@@ -10,6 +14,26 @@ class Client(TealClient):
                  allow_subdomain_redirects=False):
         super().__init__(application, response_wrapper, use_cookies, allow_subdomain_redirects)
 
+    def open(self, uri: str, res: str or Type[Thing] = None, status: int or HTTPException = 200,
+             query: dict = {}, accept=JSON, content_type=JSON, item=None, headers: dict = None,
+             token: str = None, **kw) -> (dict or str, Response):
+        if issubclass(res, Thing):
+            res = res.__name__
+        return super().open(uri, res, status, query, accept, content_type, item, headers, token,
+                            **kw)
+
+    def get(self, uri: str = '', res: Union[Type[Thing], str] = None, query: dict = {},
+            status: int or HTTPException = 200, item: Union[int, str] = None, accept: str = JSON,
+            headers: dict = None, token: str = None, **kw) -> (dict or str, Response):
+        return super().get(uri, res, query, status, item, accept, headers, token, **kw)
+
+    def post(self, data: str or dict, uri: str = '', res: Union[Type[Thing], str] = None,
+             query: dict = {}, status: int or HTTPException = 201, content_type: str = JSON,
+             accept: str = JSON, headers: dict = None, token: str = None, **kw) -> (
+            dict or str, Response):
+        return super().post(data, uri, res, query, status, content_type, accept, headers, token,
+                            **kw)
+
     def login(self, email: str, password: str):
         assert isinstance(email, str)
         assert isinstance(password, str)

ereuse_devicehub/config.py

@@ -2,7 +2,7 @@ from distutils.version import StrictVersion
 
 from ereuse_devicehub.resources.device import ComponentDef, ComputerDef, DesktopDef, DeviceDef, \
     GraphicCardDef, HardDriveDef, LaptopDef, MicrotowerDef, MotherboardDef, NetbookDef, \
-    NetworkAdapterDef, RamModuleDef, ServerDef
+    NetworkAdapterDef, ProcessorDef, RamModuleDef, ServerDef
 from ereuse_devicehub.resources.event import EventDef, SnapshotDef
 from ereuse_devicehub.resources.user import UserDef
 from teal.config import Config
@@ -12,7 +12,7 @@ class DevicehubConfig(Config):
     RESOURCE_DEFINITIONS = (
         DeviceDef, ComputerDef, DesktopDef, LaptopDef, NetbookDef, ServerDef, MicrotowerDef,
         ComponentDef, GraphicCardDef, HardDriveDef, MotherboardDef, NetworkAdapterDef,
-        RamModuleDef, UserDef, EventDef, SnapshotDef
+        RamModuleDef, ProcessorDef, UserDef, EventDef, SnapshotDef
     )
     PASSWORD_SCHEMES = {'pbkdf2_sha256'}
     SQLALCHEMY_DATABASE_URI = 'postgresql://localhost/dh-db1'

ereuse_devicehub/marshmallow.py

@@ -6,6 +6,7 @@ from teal.marshmallow import NestedOn as TealNestedOn
 
 
 class NestedOn(TealNestedOn):
+    __doc__ = TealNestedOn.__doc__
 
     def __init__(self, nested, polymorphic_on='type', db: SQLAlchemy = db, default=missing_,
                  exclude=tuple(), only=None, **kwargs):

ereuse_devicehub/resources/device/__init__.py

@@ -1,6 +1,6 @@
 from ereuse_devicehub.resources.device.schemas import Component, Computer, Desktop, Device, \
-    GraphicCard, HardDrive, Laptop, Microtower, Motherboard, Netbook, NetworkAdapter, RamModule, \
+    GraphicCard, HardDrive, Laptop, Microtower, Motherboard, Netbook, NetworkAdapter, Processor, \
-    Server
+    RamModule, Server
 from ereuse_devicehub.resources.device.views import DeviceView
 from teal.resource import Converters, Resource
 
@@ -58,3 +58,7 @@ class NetworkAdapterDef(ComponentDef):
 
 class RamModuleDef(ComponentDef):
     SCHEMA = RamModule
+
+
+class ProcessorDef(ComponentDef):
+    SCHEMA = Processor

ereuse_devicehub/resources/device/models.py

@@ -144,6 +144,13 @@ class NetworkAdapter(Component):
     speed = Column(SmallInteger, check_range('speed', min=10, max=10000))  # type: int
 
 
+class Processor(Component):
+    id = Column(BigInteger, ForeignKey(Component.id), primary_key=True)  # type: int
+    speed = Column(Float, check_range('speed', 0.1, 15))
+    cores = Column(SmallInteger, check_range('cores', 1, 10))
+    address = Column(SmallInteger, check_range('address', 8, 256))
+
+
 class RamModule(Component):
     id = Column(BigInteger, ForeignKey(Component.id), primary_key=True)  # type: int
     size = Column(SmallInteger, check_range('size', min=128, max=17000))

ereuse_devicehub/resources/device/schemas.py

@@ -1,6 +1,8 @@
-from marshmallow.fields import Float, Integer, Nested, Str
+from marshmallow import post_dump
-from marshmallow.validate import Length, Range
+from marshmallow.fields import Float, Integer, Str
+from marshmallow.validate import Length, OneOf, Range
 
+from ereuse_devicehub.marshmallow import NestedOn
 from ereuse_devicehub.resources.models import STR_BIG_SIZE, STR_SIZE
 from ereuse_devicehub.resources.schemas import Thing, UnitCodes
 
@@ -29,11 +31,21 @@ class Device(Thing):
     height = Float(validate=Range(0.1, 3),
                    unit=UnitCodes.m,
                    description='The height of the device in meters.')
-    events = Nested('Event', many=True, dump_only=True, only='id')
+    events = NestedOn('Event', many=True, dump_only=True)
+    events_one = NestedOn('Event', many=True, dump_only=True, description='Not used.')
+    events_components = NestedOn('Event', many=True, dump_only=True, description='Not used.')
+
+    @post_dump
+    def merge_events(self, data: dict) -> dict:
+        if isinstance(data.get('events_one', None), list):
+            data.setdefault('events', []).extend(data.pop('events_one'))
+        if isinstance(data.get('events_components', None), list):
+            data.setdefault('events', []).extend(data.pop('events_components'))
+        return data
 
 
 class Computer(Device):
-    components = Nested('Component', many=True, dump_only=True, only='id')
+    components = NestedOn('Component', many=True, dump_only=True)
     pass
 
 
@@ -58,7 +70,7 @@ class Microtower(Computer):
 
 
 class Component(Device):
-    parent = Nested(Device, dump_only=True, only='id')
+    parent = NestedOn(Device, dump_only=True)
 
 
 class GraphicCard(Component):
@@ -71,9 +83,9 @@ class HardDrive(Component):
     size = Integer(validate=Range(0, 10 ** 8),
                    unit=UnitCodes.mbyte,
                    description='The size of the hard-drive in MB.')
-    erasure = Nested('EraseBasic', load_only=True)
+    erasure = NestedOn('EraseBasic', load_only=True)
-    tests = Nested('TestHardDrive', many=True, load_only=True)
+    tests = NestedOn('TestHardDrive', many=True, load_only=True)
-    benchmarks = Nested('BenchmarkHardDrive', load_only=True, many=True)
+    benchmarks = NestedOn('BenchmarkHardDrive', load_only=True, many=True)
 
 
 class Motherboard(Component):
@@ -90,6 +102,12 @@ class NetworkAdapter(Component):
                     description='The maximum speed this network adapter can handle, in mbps.')
 
 
+class Processor(Component):
+    speed = Float(validate=Range(min=0.1, max=15), unit=UnitCodes.ghz)
+    cores = Integer(validate=Range(min=1, max=10))  # todo from numberOfCores
+    address = Integer(validate=OneOf({8, 16, 32, 64, 128, 256}))
+
+
 class RamModule(Component):
     size = Integer(validate=Range(min=128, max=17000), unit=UnitCodes.mbyte)
     speed = Float(validate=Range(min=100, max=10000), unit=UnitCodes.mhz)

ereuse_devicehub/resources/device/sync.py

@@ -160,7 +160,6 @@ class Sync:
         """
         events = []
         old_components = set(device.components)
-
         adding = components - old_components
         if adding:
             add = Add(device=device, components=list(adding))
@@ -177,5 +176,4 @@ class Sync:
         removing = old_components - components
         if removing:
             events.append(Remove(device=device, components=list(removing)))
-
         return events

ereuse_devicehub/resources/device/views.py

@@ -5,4 +5,10 @@ from teal.resource import View
 class DeviceView(View):
     def one(self, id: int):
         """Gets one device."""
-        return Device.query.filter_by(id=id).one()
+        device = Device.query.filter_by(id=id).one()
+        return self.schema.jsonify_polymorphic(device)
+
+    def find(self, args: dict):
+        """Gets many devices"""
+        devices = Device.query.all()
+        return self.schema.jsonify_polymorphic_many(devices)

ereuse_devicehub/resources/event/schemas.py

@@ -30,17 +30,17 @@ class Event(Thing):
                                   'hardware without margin of doubt.')
     incidence = Boolean(default=False,
                         description='Was something wrong in this event?')
-    snapshot = Nested('Snapshot', dump_only=True, only='id')
+    snapshot = NestedOn('Snapshot', dump_only=True, only='id')
     description = String(default='', description='A comment about the event.')
-    components = Nested(Component, dump_only=True, only='id', many=True)
+    components = NestedOn(Component, dump_only=True, many=True)
 
 
 class EventWithOneDevice(Event):
-    device = Nested(Device, only='id')
+    device = NestedOn(Device, only='id')
 
 
 class EventWithMultipleDevices(Event):
-    device = Nested(Device, many=True, only='id')
+    device = NestedOn(Device, many=True, only='id')
 
 
 class Add(EventWithOneDevice):
@@ -52,14 +52,14 @@ class Remove(EventWithOneDevice):
 
 
 class Allocate(EventWithMultipleDevices):
-    to = Nested(User, only='id',
+    to = NestedOn(User,
                   description='The user the devices are allocated to.')
     organization = String(validate=Length(STR_SIZE),
                           description='The organization where the user was when this happened.')
 
 
 class Deallocate(EventWithMultipleDevices):
-    from_rel = Nested(User, only='id',
+    from_rel = Nested(User,
                       data_key='from',
                       description='The user where the devices are not allocated to anymore.')
     organization = String(validate=Length(STR_SIZE),
@@ -138,6 +138,7 @@ class Snapshot(EventWithOneDevice):
     color = Color(description='Main color of the device.')
     orientation = EnumField(Orientation, description='Is the device main stand wider or larger?')
     force_creation = Boolean(data_key='forceCreation')
+    events = NestedOn(Event, many=True)
 
     @validates_schema
     def validate_workbench_version(self, data: dict):

ereuse_devicehub/resources/event/views.py

@@ -1,6 +1,6 @@
 from distutils.version import StrictVersion
 
-from flask import request, Response
+from flask import request
 
 from ereuse_devicehub.db import db
 from ereuse_devicehub.resources.device.sync import Sync
@@ -28,12 +28,14 @@ class SnapshotView(View):
         device = s.pop('device')
         components = s.pop('components') if s['software'] == SoftwareType.Workbench else None
         # noinspection PyArgumentList
-        del s['type']
         snapshot = Snapshot(**s)
         snapshot.device, snapshot.events = Sync.run(device, components, snapshot.force_creation)
+        snapshot.components = snapshot.device.components
         db.session.add(snapshot)
-        # transform it back
+        db.session.flush()  # Take to DB so we get db-generated values
-        return Response(status=201)
+        ret = self.schema.jsonify(snapshot)  # transform it back
+        ret.status_code = 201
+        return ret
 
 
 class TestHardDriveView(View):

ereuse_devicehub/resources/schemas.py

@@ -1,7 +1,9 @@
 from enum import Enum
 
-from marshmallow.fields import DateTime, List, Nested, URL, String
+from marshmallow import post_load
+from marshmallow.fields import DateTime, List, String, URL
 
+from ereuse_devicehub.marshmallow import NestedOn
 from teal.resource import Schema
 
 
@@ -22,4 +24,8 @@ class Thing(Schema):
     same_as = List(URL(dump_only=True), dump_only=True, data_key='sameAs')
     updated = DateTime('iso', dump_only=True)
     created = DateTime('iso', dump_only=True)
-    author = Nested('User', only='id', dump_only=True)
+    author = NestedOn('User', dump_only=True, exclude=('token',))
+
+    @post_load
+    def remove_type(self, data: dict):
+        data.pop('type', None)

ereuse_devicehub/resources/user/__init__.py

@@ -28,9 +28,10 @@ class UserDef(Resource):
         """
         Creates an user.
         """
-        with self.app.test_request_context():
+        with self.app.app_context():
-            self.schema.load({'email': email, 'password': password})
+            self.SCHEMA(only={'email', 'password'}, exclude=('token',)) \
+                .load({'email': email, 'password': password})
             user = User(email=email, password=password)
             db.session.add(user)
             db.session.commit()
-            return user.dump()
+            return self.schema.dump(user)

ereuse_devicehub/resources/user/schemas.py

@@ -1,6 +1,6 @@
 from base64 import b64encode
 
-from marshmallow import pre_dump
+from marshmallow import post_dump
 from marshmallow.fields import Email, String, UUID
 
 from ereuse_devicehub.resources.schemas import Thing
@@ -10,13 +10,33 @@ class User(Thing):
     id = UUID(dump_only=True)
     email = Email(required=True)
     password = String(load_only=True, required=True)
+    name = String()
     token = String(dump_only=True,
                    description='Use this token in an Authorization header to access the app.'
                                'The token can change overtime.')
 
-    @pre_dump
+    def __init__(self,
+                 only=None,
+                 exclude=('token',),
+                 prefix='',
+                 many=False,
+                 context=None,
+                 load_only=(),
+                 dump_only=(),
+                 partial=False):
+        """
+        Instantiates the User.
+
+        By default we exclude token from both load/dump
+        so they are not taken / set in normal usage by mistake.
+        """
+        super().__init__(only, exclude, prefix, many, context, load_only, dump_only, partial)
+
+    @post_dump
     def base64encode_token(self, data: dict):
         """Encodes the token to base64 so clients don't have to."""
-        # framework needs ':' at the end
+        if 'token' in data:
-        data['token'] = b64encode(str.encode(str(data['token']) + ':'))
+            # In many cases we don't dump the token (ex. relationships)
+            # Framework needs ':' at the end
+            data['token'] = b64encode(str.encode(str(data['token']) + ':')).decode()
         return data

ereuse_devicehub/resources/user/views.py

@@ -1,6 +1,6 @@
 from uuid import UUID
 
-from flask import current_app as app, request
+from flask import g, request
 
 from ereuse_devicehub.resources.user.exceptions import WrongCredentials
 from ereuse_devicehub.resources.user.models import User
@@ -14,10 +14,13 @@ class UserView(View):
 
 
 def login():
-    user_s = app.resources['User'].schema  # type: UserS
+    # We use custom schema as we only want to parse a subset of user
-    u = user_s.load(request.get_json(), partial=('email', 'password'))
+    user_s = g.resource_def.SCHEMA(only=('email', 'password'))  # type: UserS
+    # noinspection PyArgumentList
+    u = request.get_json(schema=user_s)
     user = User.query.filter_by(email=u['email']).one_or_none()
     if user and user.password == u['password']:
-        return user_s.jsonify(user)
+        schema_with_token = g.resource_def.SCHEMA(exclude=set())
+        return schema_with_token.jsonify(user)
     else:
         raise WrongCredentials()

tests/conftest.py

@@ -28,7 +28,6 @@ def _app(config: TestConfig) -> Devicehub:
 
 @pytest.fixture()
 def app(request, _app: Devicehub) -> Devicehub:
-    db.drop_all(app=_app)  # In case the test before was killed
     db.create_all(app=_app)
     # More robust than 'yield'
     request.addfinalizer(lambda *args, **kw: db.drop_all(app=_app))

tests/files/1-device-with-components.snapshot.yaml

@@ -0,0 +1,27 @@
+device:
+  manufacturer: 'p1'
+  serialNumber: 'p1'
+  model: 'p1'
+  type: 'Desktop'
+secured: False
+components:
+  - manufacturer: 'p1c1m'
+    serialNumber: 'p1c1s'
+    type: 'Motherboard'
+  - manufacturer: 'p1c2m'
+    serialNumber: 'p1c2s'
+    model: 'p1c2'
+    speed: 1.23
+    cores: 2
+    type: 'Processor'
+  - manufacturer: 'p1c3m'
+    serialNumber: 'p1c3s'
+    type: 'GraphicCard'
+    memory: 1.5
+condition:
+  appearance: 'A'
+  functionality: 'B'
+elapsed: 25
+software: 'Workbench'
+uuid: '76860eca-c3fd-41f6-a801-6af7bd8cf832'
+version: '11.0'

tests/files/2-second-device-with-components-of-first.snapshot.yaml

@@ -0,0 +1,16 @@
+device:
+  manufacturer: 'p2m'
+  serialNumber: 'p2s'
+  model: 'p2'
+  type: 'Microtower'
+secured: False
+components:
+  - manufacturer: 'p2c1m'
+    serialNumber: 'p2c1s'
+    type: 'Motherboard'
+  - manufacturer: 'p1c2m'
+    serialNumber: 'p1c2s'
+    model: 'p1'
+    speed: 1.23
+    cores: 2
+    type: 'Processor'

tests/files/3-first-device-but-removing-motherboard-and-adding-processor-from-2.snapshot.yaml

@@ -0,0 +1,17 @@
+device:
+  manufactuer: 'p1'
+  serialNumber: 'p1'
+  model: 'p1'
+  type: 'Desktop'
+secured: False
+components:
+  - manufacturer: 'p1c2m'
+    serialNumber: 'p1c2s'
+    model: 'p1'
+    type: 'Processor'
+    cores: 2
+    speed: 1.23
+  - manufacturer: 'p1c3m'
+    serialNumber: 'p1c3s'
+    type: 'GraphicCard'
+    memory: 1.5

tests/files/4-first-device-but-removing-processor.snapshot-and-adding-graphic-card.yaml

@@ -0,0 +1,15 @@
+device:
+  manufactuer: 'p1'
+  serialNumber: 'p1'
+  model: 'p1'
+  type: 'Desktop'
+secured: False
+components:
+  - manufacturer: 'p1c4m'
+    serialNumber: 'p1c4s'
+    type: 'NetworkAdapter'
+    speed: 1000
+  - manufacturer: 'p1c3m'
+    serialNumber: 'p1c3s'
+    type: 'GraphicCard'
+    memory: 1.5

tests/test_device.py

@@ -1,10 +1,11 @@
 import pytest
 
+from ereuse_devicehub.client import UserClient
 from ereuse_devicehub.db import db
 from ereuse_devicehub.devicehub import Devicehub
 from ereuse_devicehub.resources.device.exceptions import NeedsId
 from ereuse_devicehub.resources.device.models import Component, Computer, Desktop, Device, \
-    GraphicCard, Motherboard, NetworkAdapter
+    GraphicCard, Laptop, Microtower, Motherboard, NetworkAdapter
 from ereuse_devicehub.resources.device.schemas import Device as DeviceS
 from ereuse_devicehub.resources.device.sync import Sync
 from ereuse_devicehub.resources.event.models import Add, Remove
@@ -12,11 +13,11 @@ from teal.db import ResourceNotFound
 from tests.conftest import file
 
 
-def test_device_model(app: Devicehub):
+@pytest.mark.usefixtures('app_context')
+def test_device_model():
     """
     Tests that the correctness of the device model and its relationships.
     """
-    with app.test_request_context():
     pc = Desktop(model='p1mo', manufacturer='p1ma', serial_number='p1s')
     pc.components = components = [
         NetworkAdapter(model='c1mo', manufacturer='c1ma', serial_number='c1s'),
@@ -52,6 +53,7 @@ def test_device_model(app: Devicehub):
     assert GraphicCard.query.first() is None, 'We should have deleted it –it was inside the pc'
 
 
+@pytest.mark.usefixtures('app_context')
 def test_device_schema():
     """Ensures the user does not upload non-writable or extra fields."""
     device_s = DeviceS()
@@ -172,3 +174,44 @@ def test_execute_register_computer_no_hid():
     # 2: device has no HID and we force it
     db_pc, _ = Sync.execute_register(pc, set(), force_creation=True)
     assert pc.physical_properties == db_pc.physical_properties
+
+
+def test_get_device(app: Devicehub, user: UserClient):
+    """Checks GETting a Desktop with its components."""
+    with app.app_context():
+        pc = Desktop(model='p1mo', manufacturer='p1ma', serial_number='p1s')
+        pc.components = [
+            NetworkAdapter(model='c1mo', manufacturer='c1ma', serial_number='c1s'),
+            GraphicCard(model='c2mo', manufacturer='c2ma', memory=1500)
+        ]
+        db.session.add(pc)
+        db.session.commit()
+    pc, _ = user.get(res=Device, item=1)
+    assert pc['events'] == []
+    assert 'events_components' not in pc, 'events_components are internal use only'
+    assert 'events_one' not in pc, 'they are internal use only'
+    assert 'author' not in pc
+    assert tuple(c['id'] for c in pc['components']) == (2, 3)
+    assert pc['hid'] == 'p1ma-p1s-p1mo'
+    assert pc['model'] == 'p1mo'
+    assert pc['manufacturer'] == 'p1ma'
+    assert pc['serialNumber'] == 'p1s'
+    assert pc['type'] == 'Desktop'
+
+
+def test_get_devices(app: Devicehub, user: UserClient):
+    """Checks GETting multiple devices."""
+    with app.app_context():
+        pc = Desktop(model='p1mo', manufacturer='p1ma', serial_number='p1s')
+        pc.components = [
+            NetworkAdapter(model='c1mo', manufacturer='c1ma', serial_number='c1s'),
+            GraphicCard(model='c2mo', manufacturer='c2ma', memory=1500)
+        ]
+        pc1 = Microtower(model='p2mo', manufacturer='p2ma', serial_number='p2s')
+        pc2 = Laptop(model='p3mo', manufacturer='p3ma', serial_number='p3s')
+        db.session.add_all((pc, pc1, pc2))
+        db.session.commit()
+    devices, _ = user.get(res=Device)
+    assert tuple(d['id'] for d in devices) == (1, 2, 3, 4, 5)
+    assert tuple(d['type'] for d in devices) == ('Desktop', 'Microtower',
+                                                 'Laptop', 'NetworkAdapter', 'GraphicCard')

tests/test_snapshot.py

@@ -1,4 +1,5 @@
 from datetime import datetime, timedelta
+from typing import List
 from uuid import uuid4
 
 import pytest
@@ -13,6 +14,44 @@ from ereuse_devicehub.resources.user.models import User
 from tests.conftest import file
 
 
+def assert_similar_device(device1: dict, device2: dict):
+    """
+    Like Model.is_similar() but adapted for testing.
+    """
+    assert isinstance(device1, dict) and device1
+    assert isinstance(device2, dict) and device2
+    for key in 'serialNumber', 'model', 'manufacturer', 'type':
+        assert device1.get(key, None) == device2.get(key, None)
+
+
+def assert_similar_components(components1: List[dict], components2: List[dict]):
+    """
+    Asserts that the components in components1 are
+    similar than the components in components2.
+    """
+    assert len(components1) == len(components2)
+    for c1, c2 in zip(components1, components2):
+        assert_similar_device(c1, c2)
+
+
+def snapshot_and_check(user: UserClient,
+                       input_snapshot: dict,
+                       num_events: int = 0,
+                       perform_second_snapshot=True) -> dict:
+    """
+
+    """
+    snapshot, _ = user.post(res=Snapshot, data=input_snapshot)
+    assert len(snapshot['events']) == num_events
+    assert input_snapshot['device']
+    assert_similar_device(input_snapshot['device'], snapshot['device'])
+    assert_similar_components(input_snapshot['components'], snapshot['components'])
+    if perform_second_snapshot:
+        return snapshot_and_check(user, input_snapshot, num_events, False)
+    else:
+        return snapshot
+
+
 @pytest.mark.usefixtures('auth_app_context')
 def test_snapshot_model():
     """
@@ -56,6 +95,25 @@ def test_snapshot_schema(app: Devicehub):
 
 
 def test_snapshot_post(user: UserClient):
-    """Tests the post snapshot endpoint (validation, etc)."""
+    """
-    s = file('basic.snapshot')
+    Tests the post snapshot endpoint (validation, etc)
-    snapshot, _ = user.post(s, res=Snapshot.__name__)
+    and data correctness.
+    """
+    snapshot = snapshot_and_check(user, file('basic.snapshot'))
+    assert snapshot['software'] == 'Workbench'
+    assert snapshot['version'] == '11.0'
+    assert snapshot['uuid'] == 'f5efd26e-8754-46bc-87bf-fbccc39d60d9'
+    assert snapshot['events'] == []
+    assert snapshot['elapsed'] == 4
+    assert snapshot['author']['id'] == user.user['id']
+    assert 'events' not in snapshot['device']
+    assert 'author' not in snapshot['device']
+
+
+def test_snapshot_add_remove(user: UserClient):
+    s1 = file('1-device-with-components.snapshot')
+    snapshot_and_check(user, s1)
+
+    s2 = file('2-second-device-with-components-of-first.snapshot')
+    s3 = file('3-first-device-but-removing-motherboard-and-adding-processor-from-2.snapshot')
+    s4 = file('4-first-device-but-removing-processor.snapshot-and-adding-graphic-card')