PyTest - Fixtures
You want to ensure a database connection is closed after each test using a fixture. Which approach correctly uses
request.addfinalizer to close the connection?You want to ensure a database connection is closed after each test using a fixture. Which approach correctly uses request.addfinalizer to close the connection?
hard🚀 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Verify request parameter and finalizer function
def db_conn(request): conn = open_db() def close(): conn.close() request.addfinalizer(close) return conn defines a cleanup function that callsconn.close()and registers it withrequest.addfinalizer.Step 2: Check other options for correctness
def db_conn(): conn = open_db() request.addfinalizer(conn.close) return conn lacks request parameter; def db_conn(request): conn = open_db() conn.close() request.addfinalizer(conn.close) return conn calls close immediately; def db_conn(request): conn = open_db() yield conn conn.close() uses yield, not addfinalizer.Final Answer:
def db_conn(request): conn = open_db() def close(): conn.close() request.addfinalizer(close) return conn -> Option AQuick Check:
Wrap cleanup in function and addfinalizer with request param [OK]
Quick Trick: Wrap cleanup code in function, add with request.addfinalizer [OK]
Common Mistakes:
MISTAKES- Calling close immediately instead of in finalizer
- Missing request parameter
- Confusing yield fixtures with addfinalizer
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