Mocking and faking in Laravel - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is mocking in Laravel testing?

Mocking is creating a fake version of a class or interface to simulate its behavior during tests without using the real implementation.

intermediate

What is the difference between mocking and faking in Laravel?

Mocking simulates specific methods and their responses, while faking replaces entire services or classes with simple implementations for testing.

beginner

How do you create a mock of a class in Laravel?

Use the `mock()` helper or `Mockery::mock()` to create a mock object that you can set expectations on for method calls.

beginner

What is a Laravel fake and when would you use it?

A fake is a simple replacement for a service, like the Mail or Queue, used to test if actions were performed without sending real emails or jobs.

beginner

Why is mocking useful in unit testing?

Mocking isolates the code being tested by replacing dependencies, so tests run faster and focus only on the code's logic.

Which Laravel helper is commonly used to create a mock object?

A fake()

B stub()

C simulate()

D mock()

The mock() helper creates a mock object to simulate class behavior in tests.

What does a Laravel fake typically replace in tests?

A Middleware

B Entire services like Mail or Queue

C Routes

D Database connections

Fakes replace services such as Mail or Queue to prevent real actions during tests.

Why should you use mocking in unit tests?

A To isolate the code and avoid real dependencies

B To slow down tests

C To test the database

D To deploy the app

Mocking isolates the code under test by replacing dependencies with controlled mocks.

Which package does Laravel use internally for mocking?

A Mockery

B PHPUnit Mock

C Faker

D Guzzle

Laravel uses Mockery to create mock objects in tests.

What is the main benefit of faking a service in Laravel tests?

A Change the database schema

B Make the app slower

C Avoid performing real actions like sending emails

D Add new routes

Faking prevents real actions, making tests safe and faster.

Explain how mocking helps in Laravel unit testing and give an example of when to use it.

Think about testing a class that calls an external API.

Describe the difference between mocking and faking in Laravel and why each is useful.

Consider testing mail sending vs. testing a method call.