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![Page 1: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/1.jpg)
Extreme ProgrammingProgramming Practices
Object Mentor, Inc.
Copyright 1998-2000 by Object Mentor, IncAll Rights Reserved
Portions of this material are Copyright © 2000, by Addison Wesley Longman,Inc. and have been
reproduced here with permission.
www.objectmentor.com
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Extreme Programming (XP)
At its core, XP is:
![Page 3: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/3.jpg)
Extreme Programming (XP)
At its core, XP is:Very Short Cycles
![Page 4: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/4.jpg)
Extreme Programming (XP)
At its core, XP is:Very Short Cycles
Intense Feedback
![Page 5: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/5.jpg)
Extreme Programming (XP)
At its core, XP is:Very Short Cycles
Intense Feedback
Networked Communication
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The XP Planning Practices
User Stories
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The XP Planning Practices
User Stories
Release Planning
![Page 8: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/8.jpg)
The XP Planning Practices
User Stories
Release Planning
Iteration Planning
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The XP Planning Practices
User Stories
Release Planning
Iteration Planning
On Site Customer
![Page 10: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/10.jpg)
XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 11: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/11.jpg)
XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 12: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/12.jpg)
Pair Programming
Two Programmers sit at one workstation
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Pair Programming
Two Programmers sit at one workstation
They take turns “driving”
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Pair Programming
Two Programmers sit at one workstation
They take turns “driving”
Pairs are short lived
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Pair Programming
Two Programmers sit at one workstation
They take turns “driving”
Pairs are short lived
Pairing transmits knowledge to the team
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Pair Programming
Two Programmers sit at one workstation
They take turns “driving”
Pairs are short lived
Pairing transmits knowledge to the team
Pairing train newbies
![Page 17: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/17.jpg)
Pairing keeps the pace
When programming alone, you sometimes find yourself working at super speed.
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Pairing keeps the pace
When programming alone, you sometimes find yourself working at super speed.
After awhile, you lose focus and drift away in the afterglow.
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Pairing keeps the pace
When programming alone, you sometimes find yourself working at super speed.
After awhile, you lose focus and drift away in the afterglow.
Your partner keeps both from happening.
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Pair Programming Research
Laurie Williams, http://collaboration.csc.ncsu.edu/laurie/
Findings:Pairs use no more manhours than singles.
Pairs create fewer defects.
Pairs create fewer lines of code.
Pairs enjoy their work more.
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XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 22: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/22.jpg)
Test First Design
In Tiny (5 min) cycles
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Test First Design
In Tiny (5 min) cyclesWrite a test case.
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Test First Design
In Tiny (5 min) cyclesWrite a test case.
Write the code that passes it.
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Test First Design
In Tiny (5 min) cyclesWrite a test case.
Write the code that passes it.
Repeat until program does what you want.
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Test First Example
import junit.framework.*;public class TestAutoMileageLog extends TestCase{ public TestAutoMileageLog(String name) { super(name); } public void testCreateFuelingStationVisit() { FuelingStationVisit v = new FuelingStationVisit(); }}
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Test First Example
import junit.framework.*;public class TestAutoMileageLog extends TestCase{ public TestAutoMileageLog(String name) { super(name); } public void testCreateFuelingStationVisit() { FuelingStationVisit v = new FuelingStationVisit(); }}
public class FuelingStationVisit{}
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Test First Example
import junit.framework.*;public class TestAutoMileageLog extends TestCase{ public TestAutoMileageLog(String name) { super(name); } public void testCreateFuelingStationVisit() { FuelingStationVisit v = new FuelingStationVisit(); }}
public class FuelingStationVisit{}
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This may seem useless.
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This may seem useless.
But it shows me that the test framework is functioning properly.
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This may seem useless.
But it shows me that the test framework is functioning properly.
It also gives me a working base to continue from.
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This may seem useless.
But it shows me that the test framework is functioning properly.
It also gives me a working base to continue from.
We move, in tiny steps, from working base, to working base.
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Test First Example
public void testCreateFuelingStationVisit() { Date date = new Date(); double fuel = 2.0; // 2 gallons. double cost = 1.87*2; // Price = $1.87 per gallon int mileage = 1000; // odometer reading. double delta = 0.0001; //fp tolerance FuelingStationVisit v = new FuelingStationVisit( date, fuel, cost, mileage); assertEquals(date, v.getDate()); assertEquals(1.87*2, v.getCost(), delta); assertEquals(2, v.getFuel(), delta); assertEquals(1000, v.getMileage()); assertEquals(1.87, v.getPrice(), delta); }
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Test First Example
public class FuelingStationVisit { public FuelingStationVisit(Date date, double fuel, double cost, int mileage) { itsDate = date; itsFuel = fuel; itsCost = cost; itsMileage = mileage; } public Date getDate() {return itsDate;} public double getFuel() {return itsFuel;} public double getCost() {return itsCost;} public double getPrice() {return itsCost/itsFuel;} public int getMileage() {return itsMileage;}}
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Test First Example
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XUNIT
Lightweight Unit Testing Frameworkwww.junit.org
Junit
Cppunit
Pyunit
Etc.
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XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 38: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/38.jpg)
Refactoring
After getting something to work we refactor.
![Page 39: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/39.jpg)
Refactoring
After getting something to work we refactor.
Tiny (5 min) improvements
![Page 40: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/40.jpg)
Refactoring
After getting something to work we refactor.
Tiny (5 min) improvements
Followed by running all the tests.
![Page 41: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/41.jpg)
Refactoring
After getting something to work we refactor.
Tiny (5 min) improvements
Followed by running all the tests.
Build and test time must be very very fast.
![Page 42: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/42.jpg)
Refactoring
We cannot check in our code until:
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Refactoring
We cannot check in our code until:All tests are green.
![Page 44: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/44.jpg)
Refactoring
We cannot check in our code until:All tests are green.
All duplication has been removed
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Refactoring
We cannot check in our code until:All tests are green.
All duplication has been removed
The code is as expressive as we can make it.
![Page 46: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/46.jpg)
Refactoring
We cannot check in our code until:All tests are green.
All duplication has been removed
The code is as expressive as we can make it.
The code is as simple as we can make it.
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Refactoring
Comments should be minimized
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Refactoring
Comments should be minimizedThey often lie.
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Refactoring
Comments should be minimizedThey often lie.
They are an admission that we could not make our code express our ideas.
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Refactoring
Comments should be minimizedThey often lie.
They are an admission that we could not make our code express our ideas.
There are many things you can do to make software more expressive.
![Page 51: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/51.jpg)
XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 52: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/52.jpg)
Continuous Integration
Daily builds are for wimps.
![Page 53: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/53.jpg)
Continuous Integration
Daily builds are for wimps.Build, end to end, at every check in.
![Page 54: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/54.jpg)
Continuous Integration
Daily builds are for wimps.Build, end to end, at every check in.
Check in frequently.
![Page 55: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/55.jpg)
Continuous Integration
Daily builds are for wimps.Build, end to end, at every check in.
Check in frequently.
Put resources on speeding build time.
![Page 56: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/56.jpg)
Continuous Integration
Daily builds are for wimps.Build, end to end, at every check in.
Check in frequently.
Put resources on speeding build time.
Put resources on speeding test time.
![Page 57: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/57.jpg)
XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 58: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/58.jpg)
Collective Ownership
Anyone can improve any part of the code at any time.
![Page 59: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/59.jpg)
Collective Ownership
Anyone can improve any part of the code at any time.
No one acts as the gatekeeper for any part of the code.
![Page 60: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/60.jpg)
Collective Ownership
Anyone can improve any part of the code at any time.
No one acts as the gatekeeper for any part of the code.
This includes schemas…
![Page 61: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/61.jpg)
Collective Ownership
Anyone can improve any part of the code at any time.
No one acts as the gatekeeper for any part of the code.
This includes schemas…
And libraries…
![Page 62: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/62.jpg)
Collective Ownership
Anyone can improve any part of the code at any time.
No one acts as the gatekeeper for any part of the code.
This includes schemas…
And libraries…
And everything else that’s different
![Page 63: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/63.jpg)
XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 64: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/64.jpg)
Coding Standard
A group of conventions that everyone agrees to.
![Page 65: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/65.jpg)
Coding Standard
A group of conventions that everyone agrees to.
Emerges over time.
![Page 66: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/66.jpg)
Coding Standard
A group of conventions that everyone agrees to.
Emerges over time.
Continuously evolves.
![Page 67: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/67.jpg)
Coding Standard
A group of conventions that everyone agrees to.
Emerges over time.
Continuously evolves.
The team rules.
![Page 68: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/68.jpg)
XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 69: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/69.jpg)
40 hour week
You can’t do your best when you are tired.
![Page 70: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/70.jpg)
40 hour week
You can’t do your best when you are tired.
When you don’t do your best, you make messes.
![Page 71: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/71.jpg)
40 hour week
You can’t do your best when you are tired.
When you don’t do your best, you make messes.
Messes slow everyone down
![Page 72: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/72.jpg)
40 hour week
You can’t do your best when you are tired.
When you don’t do your best, you make messes.
Messes slow everyone down
So you must be rested.
![Page 73: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/73.jpg)
40 hour week
You can’t do your best when you are tired.
When you don’t do your best, you make messes.
Messes slow everyone down
So you must be rested
Occasionally, you may work one week of moderate overtime.
![Page 74: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/74.jpg)
XP Programming Practices
Pair Programming
Test-first Design
Refactoring
Continuous Integration
Collective Ownership
Coding Standard
40 hour week
![Page 75: Extreme Programming Programming Practices Object Mentor, Inc. Copyright 1998-2000 by Object Mentor, Inc All Rights Reserved Portions of this material.](https://reader030.fdocuments.in/reader030/viewer/2022032517/56649c895503460f949419d9/html5/thumbnails/75.jpg)
The End.