FASTAPI SQLITE FULL
FASTAPI SQLITE CODE

The above fixture connects us to the new test database and overrides the initial database connection made by the main app. The above session fixture ensures that every time a test is run, we connect to a testing database, create tables, and then delete the tables once the test is finished. import pytestįrom fastapi.testclient import TestClientĮngine = create_engine(SQLALCHEMY_DATABASE_URL)įollowing that, we'll use Pytest fixtures, which are functions that run before each test function to which they're applied. Remember that your imports path may differ from mine, so double-check that as well. Fixtures defined within it will be automatically accessible to any of your tests contained within the test package. When configuring a test environment, you'll want to include these fixtures in your conftest.py file. Despite the fact that there is already an accepted answer, I'd like to contribute my thoughts.

FASTAPI SQLITE FULL

Here's a solution for a full FastAPI test environment, including database setup and teardown.

FASTAPI SQLITE CODE

Or both, if you for example want to prepare the db state before an API call: def test_something_else(client, session):īoth the application code and test code will see the same state of the db. If a test only talks to the API, then you don't need to remember adding the db fixture explicitly (but it will still be invoked implicitly).Īnd if you want to write a test that directly talks to the db, you can do that as well: def test_something(session): Having two fixtures ( session and client) here has an additional advantage:

# dependency override as before, it uses the one provided by theĪpp.dependency_overrides = override_get_db # A fixture for the fastapi test client which depends on the # Rollback the overall transaction, restoring the state before the test ran. Need to start a new one when that 'after_transaction_end')

# If the application code calls mit, it will end the nested # Begin a nested transaction (using SAVEPOINT). Session = TestingSessionLocal(bind=connection) # transaction, recreates it when the application code calls mit # This fixture is the main difference to before. # also stops it from emitting COMMIT before any DDL.ĭbapi_connection.isolation_level = 'begin') # disable pysqlite's emitting of the BEGIN statement entirely. Other databases like postgresĭef do_connect(dbapi_connection, connection_record): # SAVEPOINT / nested transaction support. # These two event listeners are only needed for sqlite for proper TestingSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine) SQLALCHEMY_DATABASE_URL = 'sqlite:///./test.db' How can I do it properly? Should I create some kind of Pytest fixture around override_get_db dependency? from fastapi.testclient import TestClientįrom import declarative_base I am currently doing it by calling create_all and drop_all (commented out in code below) on the beginning and end of each test, but this is obviously not ideal (if a test fails, the database will be never torn down, impacting the result of the next test). What if I want to build and tear down database per test? (for example, the second test below will fail, because the database will no longer be empty after the first test). I have set up my unit tests as per FastAPI documentation, but it only covers a case where database is persisted among tests.

Fastapi sqlite