Software Development Cross Solution - Index of - Free

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the cost of testing Q: How do coverage tools work? A: There are basically three approaches coverage tools can take: 1. 2. 3. They can inspect the code during compilation time They can inspect it after compilation, or They can run in a customized environment (JVM) 266 Chapter 7 Are you kidding me? All that testing, and we’re still not at 100%? How could you ever do this on a real project? Good testing takes lots of time. In general, it’s not practical to always hit 100% coverage. You’ll get diminishing returns on your testing after a certain point. For most projects, aim for about 85%–90% coverage. More often than not, it’s just not possible to tease out that last 10%–15% of coverage. In other cases, it’s possible but just far too much work to be worth the trouble. You should decide on a coverage goal on a per-project, and sometimes even a per-class, basis. Shoot for a certain percentage when you first start, say 80%, and then keep track of the number of bugs found, first using your tests, and then after you release your code. If you get more bugs back after you release your code than you’re comfortable with, then increase your coverage requirement by 5% or so. Keep track of your numbers again. What’s the ratio between bugs found by your testing versus bugs found after release? At some point you’ll see that increasing your coverage percentage is taking a long time, but not really increasing the number of bugs you find internally. When you hit that point, then back off a little and know you’ve found a good balance. Q: We want to try doing coverage analysis on our project, but right now our tests cover hardly anything. How do we get started? A: Start small. Set your target at 10%. Then when you hit it, celebrate, then bump it to 15%. If you’ve never done automated testing on your project before, you might find that some parts of your system are really hard to automate. We’ll talk more about that in Chapter 8. Get as far as you can, though— some testing is way better than no testing. Download at WoweBook.Com Q: Don’t you end up with a lot of test code? A: Absolutely. You’ll have a 2-to-1 or 3-to-1 test-to-production code ratio if you’re really doing good testing. But finding bugs early is so much easier than having your customer find them. It’s more code to maintain, but if your environment is in place, the extra code and effort is generally worth the trade-off. More satisfied customers, more business, and more money!
Getting good coverage isn’t always easy... Now that we’ve gotten our heads around coverage, let’s look back at BeatBox Pro. Now that we know what to look for, there are all kinds of things not being tested: Here’s the MusicServer. We really haven’t tested any of this code. This won’t be too bad to automate, though, since there’s no real GUI. We do have to deal with all of the network stuff though, so that will take some time. We don’t have any GUI test code...which is how we missed the latest BeatBox Pro bug in the customer demo. These are our client BeatBox applications. We’ve written some code to test the receiving side. There are some things that are just inherently hard to test. GUIs actually aren’t impossible; there are tools available that can simulate button clicks and keyboard input. Things like audio or 3-D graphics, though, those are tough. The answer? Get a real person to try things out. Software tests can’t cover all the different variations of an animated game or audio in a music program. So what about code you just can’t seem to reach? Private methods, third-party libraries, or maybe your own code that’s abstracted away from the inputs and outputs of your main interface modules? Well, we’ll get to that in just a few more pages, in Chapter 8. And then...enter test-driven development. Download at WoweBook.Com testing and continuous integration We don’t have any sound testing code, either. Lots of MIDI—not easy stuff to write tests for. you are here 4 267
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Download at WoweBook.Com
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Praise for Head First Object-Orient
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Other related books from O’Reilly
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Head First Software Development by
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the authors Author(s) of Head First
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table of contents x 1 If The Goal g
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table of contents xii 3 project pla
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table of contents xiv 5 good-enough
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table of contents xvi 6 / It buildi
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table of contents xviii 8 Sometimes
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table of contents xx 10 Think the n
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table of contents xxii 12 You’ve
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table of contents xxiv ii appendix
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how to use this book Who is this bo
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how to use this book xxviii intro W
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how to use this book Here’s what
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how to use this book Read Me This i
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the review team The technical revie
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safari books online Safari® Books
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Tom’s Trails Tom’s Trails is go
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the Big Bang approach The Big Bang
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the Big Bang ends with a big mess B
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great software development is... 8
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delivering with iteration Getting t
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an iteration delivers working softw
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an iteration is a complete developm
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uild a plan out of iterations and f
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deciding on a iteration tempo for y
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change happens The customer WILL ch
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handle change with iteration Iterat
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use the right process for you The r
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CHAPTER 1 your software development
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exercise solutions 28 Chapter 1 1 P
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orion’s orbits Orion’s Orbits i
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equirements start with customer ide
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capturing what’s in your customer
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getting more with role playing and
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customer-oriented requirements Our
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keep your customer in the loop Q: W
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user stories capture what your soft
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estimates come with assumptions 44
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assumptions kill confidence in your
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highlighting assumptions and obtain
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assumptions are killed or become ri
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use your customer effectively 52 Ch
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keep estimates small A BIG user sto
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aim for estimates you and your team
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your estimates are your promise Q:
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develop your estimates cyclically T
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sum your estimates to find out your
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when your project is too long 64 Ch
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deliver what you can, when it’s n
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priorities come from your customer
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Title: Description: Est: Title: 15
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factoring in team performance 76 Ch
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uilding achievable milestones Work
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your customer decides priority Titl
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milestone = paid, iteration = on tr
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continuously buildable and runnable
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inging reality to your plan 86 Chap
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velocity applies your real performa
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from ideal to real estimates Progra
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confidence comes at a price When is
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iterations with velocity The maximu
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eality means being honest Title: Es
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eaking realistic but bad news Manag
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introducing the big board The Big B
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happiness is a project that can be
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performance and burn down Work left
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introducing iSwoon Introducing iSwo
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eak up user stories into tasks Task
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tasks have estimates Your task desc
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tasks on your board Add your tasks
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moving tasks to in progress Start w
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multiple tasks at the same time Wha
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keep communication flowing with dai
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doing your first task Task 1: Creat
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inging your design to life with a s
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exercise solution The date is asked
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monitoring your progress Standup me
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updating your project board 132 Cha
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updating your project board 134 Cha
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into the second week Standup meetin
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detecting problems with the design
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surprises... 140 Chapter 4 We inter
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dealing with unplanned tasks If the
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velocity doesn’t account for surp
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you know where you are We have a lo
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meet velocity Head First: Welcome,
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inging iSwoon under control iSwoon
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detecting bad design ...you needed
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design refactoring The Date class c
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srp analysis Spotting multiple resp
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single responsibility It makes sens
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don’t repeat yourself Your design
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efactoring iSwoon’s design A date
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standup meeting The post-refactorin
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unplanned work Unplanned tasks are
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good-enough delivers “Good Enough
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end of iteration board When everyth
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exercises 172 Chapter 5 Take each o
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exercise solutions Unplanned tasks
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introducing beatbox pro You’ve go
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digging into code Here’s the code
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finish the story And now the GUI wo
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merging changes And Bob does the sa
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disaster recovery What went wrong?
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version control in action Let’s s
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1 2 creating a repository First set
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merging changes Most version contro
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identifying conflicts If your softw
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esolving conflicts Make these chang
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dealing with older code More iterat
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dealing with multiple releases We h
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viewing logs Good commit messages m
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tagging revisions (Emergency) stand
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anches and tags 1 Use the mkdir com
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working with branches Fixing Versio
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anches, tags, and subversion Q: I
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avoiding unnecessary branches When
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214 Chapter 6 What version control
Page 254 and 255: CHAPTER 6 Development Techniques Us
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Page 258 and 259: uilding buildable software Develope
Page 260 and 261: introducing ant Ant: a build tool f
Page 262 and 263: more exercises 224 Chapter 6 ½ Are
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Page 272 and 273: CHAPTER 6 1/2 Development Technique
Page 274 and 275: it never rains but it pours Things
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Page 298 and 299: putting code to the test 260 Chapte
Page 300 and 301: 100% coverage All three of these te
Page 302 and 303: using a coverage report Testing all
Page 306 and 307: is 100% coverage efficient? 268 Cha
Page 308 and 309: an environment for testing 270 Chap
Page 310 and 311: exercise solutions 272 Chapter 7 Te
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Page 314 and 315: test before code Test FIRST, not la
Page 316 and 317: unit testing Your first test... The
Page 318 and 319: green means pass Get your tests to
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Page 342 and 343: mock objects We need lots of differ
Page 344 and 345: using a mock object framework Mock
Page 346 and 347: why mock objects? Q: These mock obj
Page 348 and 349: all green, you’re done It’s not
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Page 352 and 353: CHAPTER 8 your software development
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esults from an iteration Your itera
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daily standup meetings Standup Meet
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urn-down analysis 322 Chapter 9 Bef
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system testing System testing MUST
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incorporating system testing System
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issues with test iterations More it
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enabling communication 330 Chapter
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This is usually called acceptance t
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filing and fixing a bug The life (a
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ug trackers So you found a bug....
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learn from your iteration But there
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different project hurdles 340 Chapt
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iteration reviews Time for the iter
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other things to do A GENERAL priori
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CHAPTER 9 346 Chapter 9 Tools for y
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crossword solution 13 B 1 S Iterati
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an iteration finishes with more tha
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planning the next iteration You nee
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uilding your board for the next ite
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uilding your board for the next ite
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factoring in real velocity Q: A tea
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the customer still rules And it’s
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it’s still software Someone else
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integration tasks on your board Tit
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integrating third-party code How yo
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euse means trust too //... 368 Chap
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when reuse lets you down Testing yo
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trust no one Standup meeting 372 Ch
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looking for problems in reused sour
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finding problems in reused source c
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your process deals with it You with
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oken code happens � � � � Q
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exercise solutions 2 R 1 R 3 E S P
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At the end of the last chapter, thi
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always communicate First, you’ve
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prioritize what you do 388 Chapter
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ump some things for later 390 Chapt
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apply your process Priority one: ge
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focus on functionality We could fix
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test for bugs Figure out what funct
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think about estimating Even though
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spike tests Spike test to estimate
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estimate what’s left What do the
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factor in confidence Your team’s
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always communicate Give your custom
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apply other techniques Figure out w
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successful deliveries matter Things
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functionality wins most importantly
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CHAPTER 11 414 Chapter 11 Tools for
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crossword solution 10 F 15 H 5 P Bu
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software process defined Pinning do
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evaluate everything The big board 4
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ensure changes improve things The b
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formalize if necessary Formal attir
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other resources Some additional res
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CHAPTER 12 428 Chapter 12 Tools for
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exercise solutions 4 S 11 P 14 A So
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uml and class diagrams #1. UML clas
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sequence diagrams #2. Sequence diag
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user stories and use cases #3. User
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system testing vs. unit testing #4.
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CHAPTER 1 development techniques CH
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development principles Deliver soft
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the index building projects (contin
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the index H Head First Java BeatBox
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the index No Dumb Questions (contin
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the index singularly focused 152 so
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the index third-party code bugs in
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