Software Development Cross Solution - Index of - Free

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anches, tags, and subversion Q: I’ve heard branches are a bad idea and should be avoided. Why are we talking about them? A: Branches aren’t always a bad thing; they have an important place in software development. But, they do come with a price. We’ll talk about that over the next few pages. Q: What else can tags be used for? A: Tags are great for tracking released versions of software, but you can also use them for keeping track of versions as software goes through testing or QA—think alpha1, alpha2, beta1, ReleaseCandidate1, ReleaseCandidate2, ExternalTesting, etc. It’s also a good practice to tag the project at the end of each iteration. Q: Earlier, you said not to commit changes to a tag. What’s that supposed to mean? And how can you prevent people from doing it? A: The issue with commiting changes to a tag is really a Subversion peculiarity; other tools explicitly prohibit commiting to a tag. Since Subversion uses the copy command to create a tag, exactly like it does a branch, you technically can commit into a tag just like any other place in the repository. However, this is almost always a bad idea. The reason you tagged something was to be able to get back to the code just as it was when you tagged it. If you commit changes into the tag, it’s not the same code you originally tagged. Subversion does have ways of putting permission controls on the tags directory so that you can prevent people from committing into it. However, once people get used to Subversion, it’s usually not a major problem, and you can always revert changes to a tag in the odd case where it happens. 210 Chapter 6 Q: We’ve been using file:///c:/... for our repository. How is that supposed to work with multiple developers? A: Great question—there are a couple things you can do here. First, Subversion has full support for integration with a web server, which lets you specify your repository location as http:// or https://. That’s when things get really interesting. For example, with https you get encrypted connections to your repository. With either web approach, you can share your repository over a much larger network without worrying about mapping shared drives. It’s a little more work to configure, but it’s great from the developer perspective. If you can’t use http access for your repository, Subversion also supports tunneling repository access through SSH. Check out the Subversion documentation (http://svnbook.red-bean.com/) for more information on how to set these up. Q: When I run the log command, I see the same revision number all over the place. What’s that about? A: Different tools do versioning (or revisioning) differently. What you’re seeing is how Subversion does its revision tracking. Whenever you commit a file, Subversion applies a revision number across the whole project. Basically, that revision says that “The entire project looked like this at revision 9.” This means that if you want to grab the project at a certain point you only need to know one revision number. Other tools version each file separately (most notably the version control tool called CVS which was a predecessor to Subversion). That means that to get a copy of a project at a certain state, you need to know the version numbers of each file. This really isn’t practical, so tags become even more critical. Download at WoweBook.Com Q: Why did we branch the Version 1.0 code instead of leaving Version 1.0 in the trunk, and branch the new work? A: That would work, but the problem with that approach is you end up buried in branches as development goes on. The trunk ends up being ancient code, and all the new work happens several branches deep. So you’d have a branch for the next version, and another branch for the next... With branches for older software, you’ll eventually stop working with some of those branches. (Do you think Microsoft is still making fixes to Word 95?) Q: To create tags and branches with Subversion, we used the copy command. Is that normal? A: Well, it’s normal for Subversion. That’s because Subversion was designed for very “cheap” copies, which just means a copy doesn’t create lots of overhead. When you create a copy, Subversion actually just marks the revision you copied from, and then stores changes relative to that. Other version control tools do things differently. For example, CVS has an explicit tag command, and branches result in “real” copies of files, meaning they take a lot of time and resources.
What should Bob do? Why? WIth the security fix to Version 1.0 taken care of, we’re back to our original user story. Bob needs to implement two different saving mechanisms for the BeatBox application: one for when the user is on a Mac, and one for when a user is on a Windows PC. Since these are two completely different platforms, what should Bob do here? Download at WoweBook.Com version control you are here 4 211
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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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Page 216 and 217: introducing beatbox pro You’ve go
Page 218 and 219: digging into code Here’s the code
Page 220 and 221: finish the story And now the GUI wo
Page 222 and 223: merging changes And Bob does the sa
Page 224 and 225: disaster recovery What went wrong?
Page 226 and 227: version control in action Let’s s
Page 228 and 229: 1 2 creating a repository First set
Page 230 and 231: merging changes Most version contro
Page 232 and 233: identifying conflicts If your softw
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Page 240 and 241: viewing logs Good commit messages m
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Page 258 and 259: uilding buildable software Develope
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putting code to the test 260 Chapte
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100% coverage All three of these te
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using a coverage report Testing all
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the cost of testing Q: How do cover
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is 100% coverage efficient? 268 Cha
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an environment for testing 270 Chap
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exercise solutions 272 Chapter 7 Te
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test before code Test FIRST, not la
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unit testing Your first test... The
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green means pass Get your tests to
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testing a user story’s functional
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implement a test in code import org
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drive your code with TDD In TDD, te
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task done when tests pass Completin
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first fail Red: write (failing) tes
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keep it simple You can just make up
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simple code is testable code Always
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switching to test code with the str
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where to place your test code Remem
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etter code through testing Testing
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tests = code and lots of it More te
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mock objects We need lots of differ
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using a mock object framework Mock
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why mock objects? Q: These mock obj
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all green, you’re done It’s not
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test, red, code, green A day in the
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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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