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alembic-migration-fixtures-0.1.0

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مشاهده بیشتر
0.1.0
0.1.0

توضیحات

Pytest fixtures for tests involving databases managed by alembic migrations
ویژگی مقدار
سیستم عامل -
نام فایل alembic-migration-fixtures-0.1.0
نام alembic-migration-fixtures
نسخه کتابخانه 0.1.0
نگهدارنده ['Saulius Beinorius']
ایمیل نگهدارنده ['saulius.beinorius@gmail.com']
نویسنده Saulius Beinorius
ایمیل نویسنده saulius.beinorius@gmail.com
آدرس صفحه اصلی https://github.com/Barbora-Data-Science/alembic-migration-fixtures
آدرس اینترنتی https://pypi.org/project/alembic-migration-fixtures/
مجوز Apache-2.0
[![Formatter](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) [![PyPI version](https://badge.fury.io/py/alembic-migration-fixtures.svg)](https://pypi.org/project/alembic-migration-fixtures/) [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/alembic-migration-fixtures)](https://pypi.org/project/alembic-migration-fixtures/) # Description Pytest fixture to simplify writing tests against databases managed with `alembic`. Before each test run, alembic migrations apply schema changes which then allows tests to only care about data. This way your application code, and the database migrations get executed by the test. Only tested with PosgreSQL. However, code may work with other databases as well. # Installation Install with `pip install alembic-migration-fixtures` or any other dependency manager. Afterwards, create a pytest fixture called `database_engine` returning an SQLAlchemy `Engine` instance. _WARNING_ Do not specify the production / development / any other database where data is important in the engine fixture. If you do so, the tests WILL truncate all tables and data loss WILL occur. # Usage This library provides a pytest [fixture](https://docs.pytest.org/en/6.2.x/fixture.html) called `test_db_session`. Use this to replace the normal SQLAlchemy session used within the application, or else tests may not be independent of one another. How the fixture works with your tests: 1. Fixture recreates (wipes) the database schema based on the engine provided for the test session 1. Fixture runs alembic migrations (equivalent to `alembic upgrade heads`) 1. Fixture creates a test database session within a transaction for the test 1. Your test sets up data and runs the test using the session (including `COMMIT`ing transactions) 1. Your test verifies data is in the database 1. Fixture rolls back the transaction (and any inner `COMMIT`ed transactions in the test) This two-level transaction strategy makes it so any test is independent of one another, since the database is empty after each test. Since the database schema only gets re-created once per session, the test speed is only linearly dependent on the number of migrations. # Development This library uses the [poetry](https://python-poetry.org/) package manager, which has to be installed before installing other dependencies. Afterwards, run `poetry install` to create a virtualenv and install all dependencies. To then activate that environment, use `poetry shell`. To run a command in the environment without activating it, use `poetry run <command>`. [Black](https://github.com/psf/black) is used (and enforced via workflows) to format all code. Poetry will install it automatically, but running it is up to the user. To format the entire project, run `black .` inside the virtualenv. # Contributing This project uses the Apache 2.0 license and is maintained by the data science team @ Barbora. All contribution are welcome in the form of PRs or raised issues.


نیازمندی

مقدار نام
>=1.4.2,<1.7 alembic
>=5.2,<7.0 pytest
>=1.3.19,<1.5 SQLAlchemy


زبان مورد نیاز

مقدار نام
>=3.7,<4.0 Python


نحوه نصب


نصب پکیج whl alembic-migration-fixtures-0.1.0:

    pip install alembic-migration-fixtures-0.1.0.whl


نصب پکیج tar.gz alembic-migration-fixtures-0.1.0:

    pip install alembic-migration-fixtures-0.1.0.tar.gz