November 2024
Intermediate to advanced
300 pages
7h 12m
English
Content preview from Pragmatic Unit Testing in Java with JUnit, 3rd EditionBecome 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,
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Reasons to Write a Unit Test
Joe has just completed work on a small feature change, adding several dozen lines to the system. He’s fairly confident in his change, but it’s been a while since he’s tried things out in the deployed system. Joe runs the build script, which packages and deploys the change to the local web server. He pulls up the application in his browser, navigates to the appropriate screen, enters a bit of data, clicks submit, and…stack trace!
Joe stares at the screen for a moment, then the code. Aha! Joe notes that he forgot to initialize a field. He makes the fix, runs the build script again, cranks up the application, enters data, clicks submit, and…hmm, that’s not the right amount. Oops. This time, it takes a bit longer to ...
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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.
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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.