Alexander Hess
fdcc93a1ea
- use SQLAlchemy (and PostgreSQL) to model the ORM layer
- add the following models:
+ Address => modelling all kinds of addresses
+ City => model the three target cities
+ Courier => model the UDP's couriers
+ Customer => model the UDP's customers
+ Order => model the orders received by the UDP
+ Restaurant => model the restaurants active on the UDP
- so far, the emphasis lies on expression the Foreign Key
and Check Constraints that are used to validate the assumptions
inherent to the cleanded data
- provide database-independent unit tests with 100% coverage
- provide additional integration tests ("e2e") that commit data to
a PostgreSQL instance to validate that the constraints work
- adapt linting rules a bit
51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
"""Test the ORM's Customer model."""
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import pytest
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from sqlalchemy.orm import exc as orm_exc
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from urban_meal_delivery import db
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class TestSpecialMethods:
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"""Test special methods in Customer."""
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# pylint:disable=no-self-use
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def test_create_customer(self, customer_data):
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"""Test instantiation of a new Customer object."""
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result = db.Customer(**customer_data)
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assert result is not None
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def test_text_representation(self, customer_data):
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"""Customer has a non-literal text representation."""
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customer = db.Customer(**customer_data)
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id_ = customer_data['id']
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result = repr(customer)
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assert result == f'<Customer(#{id_})>'
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@pytest.mark.e2e
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@pytest.mark.no_cover
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class TestConstraints:
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"""Test the database constraints defined in Customer."""
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# pylint:disable=no-self-use
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def test_insert_into_database(self, customer, db_session):
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"""Insert an instance into the database."""
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db_session.add(customer)
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db_session.commit()
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def test_dublicate_primary_key(self, customer, customer_data, db_session):
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"""Can only add a record once."""
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db_session.add(customer)
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db_session.commit()
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another_customer = db.Customer(**customer_data)
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db_session.add(another_customer)
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with pytest.raises(orm_exc.FlushError):
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db_session.commit()
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