Design Driven Testing: Test Smarter, Not Harder

ISBN-13: 9781430229438 / Angielski / Miękka / 2010 / 368 str.

Matt Stephens; Doug Rosenberg

Opis

In this chapter we illustrated how to drive unit tests from a software design, identifying test scenarios in a systematic way that ensures the code is covered in all the right places. We also illustrated the use of "stunt services" and mock objects to isolate the code being tested; finally, we discussed driving unit tests deeper into algorithmic code that may benefit from finer-grained testing. Is there a way to get 95% of the benefit of the comprehensive unit testing we did in this chapter with significantly fewer tests? In the next chapter, we'll show how to do exactly that with controller tests. As you'll see, unit tests do have their place, but controller tests can often represent a smarter, more structured approach to application testing. 136 C H A P T E R 6 ? ? ? Conceptual Design and Controller Testing As you saw in Chapter 5, unit testing doesn't have to involve exhaustively covering every single line of code, or even every single method, with tests. There's a law of diminishing returns--and increasing difficulty--as you push the code coverage percentile ever higher. By taking a step back and looking at the design on a broader scale, it's possible to pick out the key areas of code that act as input/output junctures, and focus the tests on those areas.

Spis treści

1. Somebody Has It Backwards
2. TDD Using Hello World
3. “Hello World!” Using DDT
4. Introducing the Mapplet Project
5. Detailed Design and Unit Testing
6. Conceptual Design and Controller Testing
7. Acceptance Testing: Expanding Use Case Scenarios
8. Acceptance Testing: Business Requirements
9. Unit Testing Antipatterns (The “Don’ts”)
10. Design for Easier Testing
11. Automated Integration Testing
12. Unit Testing Algorithms
13. Alice in Use-Case Land
14. ’Twas Brillig and the Slithy Tests

O autorze

Matt Stephens is a Java developer, project leader, and technical architect with a financial organization based in central London. He's been developing software commercially for over 15 years, and has led many agile projects through successive customer releases. He has spoken at a number of software conferences on object-oriented development topics, and his writing appears regularly in a variety of software journals and websites, including The Register and ObjectiveView. Matt is the co-author of Extreme Programming Refactored: The Case Against XP (Apress, 2003) with Doug Rosenberg, Agile Development with ICONIX Process (Apress, 2005) with Doug Rosenberg and Mark Collins-Cope, and Use Case Driven Object Modeling with UML: Theory and Practice with Doug Rosenberg (Apress, 2007). Catch Matt online at www.softwarereality.com.