RSpec Mocking & Testing FAQs

Question 1

Does this skill support partial mocking?

Accepted Answer

Yes, it provides strategies for partial mocking, which allows you to mock specific methods on an actual instance of a class, a technique often necessary when dealing with legacy code or complex third-party integrations.

Question 2

When should I use RSpec spies instead of mocks?

Accepted Answer

Spies are ideal for the 'allow-then-expect' pattern, letting you verify that a method was called after the code under test has run, which often leads to more readable and less brittle test structures.

Question 3

How does this skill help with test performance?

Accepted Answer

The skill includes guidance on minimizing object instantiation and using 'verified doubles' to ensure your mocks stay in sync with real classes without the overhead of loading full environments or hitting databases.

Question 4

Is this skill suitable for TDD (Test-Driven Development)?

Accepted Answer

Absolutely. It provides the architectural patterns and syntax examples needed to define object interfaces and interactions before the actual implementation code is written.

Question 5

What is the difference between a double and a mock in RSpec?

Accepted Answer

A double is a generic 'stand-in' object used to replace a real dependency. A mock is technically a double that has been given specific expectations about the messages (methods) it should receive during a test.

RSpec Mocking & Testing

RSpec Mocking & Testing

Key Features

Use Cases

Key Features

Use Cases