50 lines
1.3 KiB
Python
50 lines
1.3 KiB
Python
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"""Shared pytest fixtures for the trading-bot test suite.
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Provides:
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- `db_session`: an `AsyncSession` against the dev Postgres (transaction-scoped,
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rolled back between tests).
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"""
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from __future__ import annotations
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import os
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from collections.abc import AsyncIterator
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import pytest_asyncio
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from sqlalchemy.ext.asyncio import (
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AsyncSession,
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async_sessionmaker,
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create_async_engine,
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)
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def _dev_db_url() -> str:
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return os.environ.get(
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"TRADING_TEST_DATABASE_URL",
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"postgresql+asyncpg://trading:trading@localhost:5432/trading_dev",
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)
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@pytest_asyncio.fixture
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async def db_session() -> AsyncIterator[AsyncSession]:
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"""Per-test session wrapped in a transaction that is rolled back at teardown."""
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engine = create_async_engine(_dev_db_url(), echo=False)
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try:
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connection = await engine.connect()
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transaction = await connection.begin()
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session_factory = async_sessionmaker(
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bind=connection,
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class_=AsyncSession,
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expire_on_commit=False,
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join_transaction_mode="create_savepoint",
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)
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session = session_factory()
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try:
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yield session
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finally:
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await session.close()
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await transaction.rollback()
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await connection.close()
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finally:
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await engine.dispose()
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