By Godfrey Nolan
This brief step-by-step consultant walks you thru unit checking out, mocking and non-stop integration and the way to get those key elements operating on your rapid tasks. This booklet additionally seems at easy methods to write your quick apps utilizing try out pushed improvement (TDD).
Agile practices have made significant inroads in iOS improvement, even though it’s very strange to work out whatever as uncomplicated as unit checking out on a quick program. performed adequately, Agile improvement ends up in an important raise in improvement potency and a discount within the variety of defects.
Apple has published unit trying out and code assurance frameworks for rapid improvement in XCode. Up beforehand getting unit checking out up and working in fast used to be now not for the faint-hearted. fortunately now, there's no excuse except an absence of data on the place to get started.
iOS builders are confronted with their very own set of difficulties reminiscent of tightly coupled code, fragmentation, immature checking out instruments all of which might be solved utilizing current Agile instruments and methods. After utilizing this publication, you will make your quick apps agile and sound.
What you'll Learn:
- How to jot down unit checks in Swift
- How to jot down an software utilizing try pushed Development
- Mocking frameworks
- How to establish and configure a continual Integration Server
- How to degree code coverage
- GUI Testing
Who This e-book Is For:
Swift builders and will be cellular app testers will enjoy the suggestions during this book.
Read Online or Download Agile Swift: Swift Programming Using Agile Tools and Techniques PDF
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Extra resources for Agile Swift: Swift Programming Using Agile Tools and Techniques
9. Next, hold Control and drag the Clear button to the code. 10. In the menu that pops up, choose the following and click Connect; see Figure 2-12. • Connection: Action • Name: clear • Type: UIButton • Event: Touch Up Inside • Arguments: Sender 39 Chapter 2 ■ Swift Unit Testing Figure 2-13. Connect the Clear button 11. Finally, we connect the text field where we are going to place the results of our calculations. 12. Hold control and drag the text field to the ViewController code. 13. In the menu that pops up, choose the following and click Connect; see Figure 2-14.
You can find the logs in the Reporting tab, beside the Coverage tab in Xcode (see Figure 2-23). The logs will show the order that the tests are run in, as well as timings. Figure 2-23. Test logs 50 Chapter 2 ■ Swift Unit Testing If a test does fail, then the logs can be filtered to show errors only, as shown in Figure 2-24. In this example we’ve removed the guard condition from the divide function and caused an error by testing to see what happens when we divide by zero. Figure 2-24. Test error logs Clicking on the error will take you to errant code, as shown in Figure 2-25.
Measure() to see how long our XCTAssert on a simple addition would take. Listing 2-5. add(a:1, b:2),3) } } If we run the test in Xcode, as shown in Figure 2-3, we also see that the test runs successfully. Figure 2-3. Timing your tests Additionally, Xcode provides the ability to baseline your test, as shown in Figure 2-4, so that you can see how your test is performing over time to see if it’s getting better or worse. 31 Chapter 2 ■ Swift Unit Testing Figure 2-4. Baseline your test times Calculator App In this section, we’re going to create a simple app to show how easy it is to add unit testing to Swift apps in Xcode.