Factory fixtures in PyTest - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a factory fixture in pytest?

A factory fixture is a pytest fixture that returns a function to create test data or objects dynamically during a test. It helps generate multiple instances with different data easily.

beginner

How do you define a factory fixture in pytest?

You define a factory fixture by creating a fixture that returns a function. This inner function can accept parameters to customize the created object for each test.

intermediate

Why use factory fixtures instead of regular fixtures?

Factory fixtures allow creating multiple customized objects in one test, avoiding duplication and making tests more flexible and readable.

beginner

Example: What does this factory fixture do?
<pre>import pytest

@pytest.fixture
def user_factory():
    def create_user(name, age):
        return {'name': name, 'age': age}
    return create_user</pre>

This fixture returns a function create_user that takes name and age as inputs and returns a dictionary representing a user. Tests can call user_factory() to get this function and create users with different data.

beginner

How do you use a factory fixture inside a test?

You add the factory fixture as a test argument. Then call the returned function with needed parameters to create test objects dynamically.

What does a factory fixture return in pytest?

A A function to create test data

B A fixed test object

C A test report

D A test case

Factory fixtures return a function that can create test data or objects dynamically.

Why are factory fixtures useful?

A They speed up test execution by caching results

B They replace the need for assertions

C They automatically generate test reports

D They allow creating multiple customized objects in tests

Factory fixtures help create many customized objects easily within tests.

How do you access a factory fixture in a test function?

A By calling pytest.run()

B By importing it directly

C By adding it as a parameter to the test function

D By using a global variable

You use factory fixtures by adding them as parameters to your test functions.

What is the main difference between a regular fixture and a factory fixture?

A Factory fixtures return a function; regular fixtures return fixed data

B Regular fixtures run faster

C Factory fixtures cannot accept parameters

D Regular fixtures are only for setup and teardown

Factory fixtures return a function to create data dynamically, while regular fixtures return fixed data.

Which of these is a good use case for a factory fixture?

A Running tests in parallel

B Creating multiple user objects with different names and ages

C Generating test coverage reports

D Mocking external APIs

Factory fixtures are great for creating multiple test objects with varying data.

Explain what a factory fixture is and how it helps in pytest testing.

Think about how you can create many test objects easily.

Describe how to write and use a factory fixture in a pytest test.

Focus on the steps from fixture definition to usage.