iOS Interview Prep 11 — Integration Test

Xiao.J
iOS Interview Prep Guide
3 min readAug 8, 2023

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The purpose of this interview preparation series is to assist you in quickly refining your interview skills and thoroughly preparing for the typical questions asked during an iOS interview. If you find it useful, please leave a comment or tap the like button.

Why Integration Test?

Integration tests are great for testing specific view controllers that can be launched in isolation with mocked data. They are a step above unit tests in that you can interact with a UI (such as with taps/swipes) but are faster than E2E tests in that they can be land-blocking.

It plays a crucial role in ensuring that different components of your app work harmoniously and provide a seamless user experience. They help detect issues that might arise from the interaction between various parts of your app and contribute to the overall stability and reliability of your software.

What is Integration test?

An integration test is a type of test that verifies the interactions between different components of an app. Integration tests look very similar to unit tests, use the same APIs, and follow the same Arrange-Act-Assert pattern. The difference between a unit test and an integration test is one of scale.

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Xiao.J
iOS Interview Prep Guide

Ex-Meta with 10+ years of experience in iOS Development 