[Solved] Consider this Flask test snippet:def test_add_users(db): user1 = User(name='John') user2 = User(name='Jane') db.session.add_all([user1, user2]) db.session.commit() all_users = User.query.... | Flask

Flask - Testing Flask Applications

Consider this Flask test snippet:

def test_add_users(db):
    user1 = User(name='John')
    user2 = User(name='Jane')
    db.session.add_all([user1, user2])
    db.session.commit()
    all_users = User.query.all()
    print(len(all_users))

What will be printed?

A2

B0

C1

DAn error occurs

Step-by-Step Solution

Solution:

Step 1: Add users to session
Two User objects are added to the session with add_all.
Step 2: Commit the session
Calling db.session.commit() saves both users to the database.
Step 3: Query all users
User.query.all() retrieves all users, which should be 2.
Final Answer:
2 -> Option A
Quick Check:
Committed users appear in query results [OK]

Quick Trick: Commit session before querying to see added records [OK]

Common Mistakes:

MISTAKES

Forgetting to commit, so query returns zero
Assuming add_all adds only one user
Expecting an error without context setup

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More Flask Quizzes

Consider this Flask test snippet:

Step 1: Add users to session

Step 2: Commit the session

Step 3: Query all users

Final Answer:

Quick Check:

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