54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from types import SimpleNamespace
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import pytest
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from pydantic import ValidationError
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from app.config import Settings
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def test_database_pool_defaults_fit_two_backend_node_budget():
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settings = Settings(_env_file=None)
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assert settings.db_pool_size == 20
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assert settings.db_pool_max_overflow == 10
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# Two backend nodes use at most 60 application connections, leaving room
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# under PostgreSQL's common 100-connection default for admin/backup work.
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assert 2 * (settings.db_pool_size + settings.db_pool_max_overflow) == 60
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@pytest.mark.parametrize("values", [{"db_pool_size": 0}, {"db_pool_max_overflow": -1}])
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def test_database_pool_rejects_invalid_limits(values):
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with pytest.raises(ValidationError):
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Settings(_env_file=None, **values)
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def test_engine_uses_configured_pool_limits(monkeypatch):
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from app.db import base
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observed = {}
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sentinel = object()
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def capture(url, **options):
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observed["url"] = url
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observed.update(options)
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return sentinel
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settings = SimpleNamespace(
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database_url="postgresql+asyncpg://lct:test@localhost/lct",
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db_pool_size=12,
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db_pool_max_overflow=7,
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)
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monkeypatch.setattr(base, "get_settings", lambda: settings)
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monkeypatch.setattr(base, "create_async_engine", capture)
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base.reset()
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try:
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assert base.get_engine() is sentinel
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finally:
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base.reset()
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assert observed == {
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"url": settings.database_url,
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"pool_pre_ping": True,
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"pool_size": 12,
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"max_overflow": 7,
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"hide_parameters": True,
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}
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