urban-meal-delivery/tests/test_config.py
Alexander Hess a16c260543
Add database migrations
- use Alembic to migrate the PostgreSQL database
  + create initial migration script to set up the database,
    as an alternative to db.Base.metadata.create_all()
  + integrate Alembic into the test suite; the db_engine fixture
    now has two modes:
    * create the latest version of tables all at once
    * invoke `alembic upgrade head`
    => the "e2e" tests are all run twice, once in each mode; this
       ensures that the migration scripts re-create the same database
       schema as db.Base.metadata.create_all() would
    * in both modes, a temporary PostgreSQL schema is used to create the
      tables in
    => could now run "e2e" tests against production database and still
       have isolation
- make the configuration module public (to be used by Alembic)
- adjust linting rules for Alembic
2020-08-11 10:29:58 +02:00

54 lines
1.7 KiB
Python

"""Test the package's configuration module."""
import pytest
from urban_meal_delivery import configuration
envs = ['production', 'testing']
@pytest.mark.parametrize('env', envs)
def test_config_repr(env):
"""Config objects have the text representation '<configuration>'."""
config = configuration.make_config(env)
assert str(config) == '<configuration>'
def test_invalid_config():
"""There are only 'production' and 'testing' configurations."""
with pytest.raises(ValueError, match="'production' or 'testing'"):
configuration.make_config('invalid')
@pytest.mark.parametrize('env', envs)
def test_database_uri_set(env, monkeypatch):
"""Package does NOT emit warning if DATABASE_URI is set."""
uri = 'postgresql://user:password@localhost/db'
monkeypatch.setattr(configuration.ProductionConfig, 'DATABASE_URI', uri)
monkeypatch.setattr(configuration.TestingConfig, 'DATABASE_URI', uri)
with pytest.warns(None) as record:
configuration.make_config(env)
assert len(record) == 0 # noqa:WPS441,WPS507
@pytest.mark.parametrize('env', envs)
def test_no_database_uri_set(env, monkeypatch):
"""Package does not work without DATABASE_URI set in the environment."""
monkeypatch.setattr(configuration.ProductionConfig, 'DATABASE_URI', None)
monkeypatch.setattr(configuration.TestingConfig, 'DATABASE_URI', None)
with pytest.warns(UserWarning, match='no DATABASE_URI'):
configuration.make_config(env)
def test_random_testing_schema():
"""CLEAN_SCHEMA is randomized if not set explicitly."""
result = configuration.random_schema_name()
assert isinstance(result, str)
assert result.startswith('temp_')
assert len(result) == 15