May 2014
Intermediate to advanced
576 pages
13h 35m
English
Content preview from Xcode 5 Developer Reference
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 18: Working with Testing and Integration
Unit testing is a powerful software engineering technique that’s supported in Xcode. This chapter outlines the technique so you can understand the theory behind unit testing, and it explains how to use unit testing in practice.
Introducing Unit Testing
You can test software in many ways, and software engineering has evolved formal processes that can simplify design and improve project efficiency.
Software can fail in five ways:
- The conceptual model for the user interface is misleading, incorrect, or inconsistent. If typical users make wrong assumptions about the software, the developer has made wrong assumptions about how users think and how they expect the software to work. Failures at this level may not be critical, but they frustrate users and waste their time.
- The UI is fragile. Common and inevitable user errors—such as whitespace in text, null entries, misspellings or invalid characters, or accidental mouse clicks—cause the application to fail.
- The UI or underlying model isn’t secure. Deliberate hacking attempts can open an application’s internal features to outsiders in an uncontrolled way.
- The underlying logic is flawed. Code may contain incorrect assumptions about interfaces, contracts, and processing requirements.
- The underlying logic is fragile. Memory or file errors, API inconsistencies and bugs, threading ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.