an iteration in the life of an agile testerlisacrispin.com/downloads/iterationinlife.pdfhow to plan...
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An Iteration in the Life of an Agile Tester
Better Software 2008
Lisa CrispinWith Material from Janet Gregory
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Copyright 2008: Lisa Crispin
Introduction
Me: Coding, testing Joined first agile team in 2000
Tester's place in agile unclear! Currently on Scrum/XP team developing
Java-based web app Since 2003
Help agile teams/testers
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Introduction
How about you? What do you hope to take from this
tutorial?
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Goals
When you leave, you'll know: How to plan testing for agile projects How agile testers hit the ground running How testers collaborate, and who with How to ensure a successful release How agile testers help their teams
improve their product Other items you brought up
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Let's Follow an Agile Tester...
...through an iteration, and more:
Release/Theme PlanningLaying the Ground WorkIteration PlanningCoding and TestingSuccessful DeliveryWrap Up the Iteration
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Release/Theme Planning (1)
Preparing for the next few iterations Sizing stories Help business set priorities 20,000 ft. view Test planningDifferent teams take different approaches Only plan first few stories “Lean”
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Release/Theme Planning (2) Avoid too much work up front
Priorities change! Identify stories to be done first
Steel thread or thin slice Consider impact on larger system Don't forget load, security, reliability, other
ilities
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Sizing Stories
Estimate the relative size of each story Planning poker Reduce scope as needed Consider risk Quick process (they're just estimates!)
“Planning poker” originated with Mike Cohn, Mountain Goat Software
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How Testers Contribute (1)
Consider different viewpoints: What problem is this solving? What business value does it deliver? How will the end user use it? What's the worst thing that can happen? Programmer's perspective – how to
implement Ask open-ended questions
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How Testers Contribute (2)
Identify hidden assumptions Mismatch between different viewpoints “Obvious” from customer or programmer
perspective Non-functional components
Security Performance Usability ...
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How Testers Contribute (3)
Infrastructure considerations Test environments, data Tools Resources
Embedded systems? Outdated hardware? Third parties? Legacy code?
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Group ExerciseDivide into small groups. Appoint one person to act as the
product owner and answer questions. Size each story as small, medium or large. What assumptions might be missed? What are some different perspectives? Any special concerns that affect size?
As an online shopper, I want a “smart” toy shopping tool so I can find an appropriate gift
As an online shopper, I want a simple way to search for a brand or type of toy so I can see a list of results
As an online shopper, I want to be able to see the cost of different shipping options when I check out, so I can choose
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A Little Prep Work Agile tries to work “just in time” But, need to hit the ground running Some preparation may save time during
iteration Don't do it if it doesn't save time Be proactive Help customer prepare
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“Pre-Planning” Development, Customer Team together Discuss each story
Examples, user acceptance tests Brainstorm – risks, dependencies, design
Identify unusual testing needs eg. load, security
Help customers get advance clarity accommodate different needs but achieve consensus
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Small Chunks, Steel Threads
Identify steel threads / thin slices / tracer bullets Test/code/test basic path that delivers value
Quick feedback on design, test approach Then test/code/test next little chunk Continue until story is complete
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Steel Thread ExampleA steel thread diagram, with “passes” numbered 1, 2, 3, 4.
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Distributed Teams Keep remote team members, customers in loop
Get their input for planning Divide up work
May need extra roles “Functional analysts”, proxies
Tools for collaboration, communication Tracking tasks Requirements, tests Conferencing, pairing
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Resources, Technical Solutions Identify expertise not already on team
Bring in specialists if needed Or budget time to develop expertise
Spike technical solutions Story to research technologies, architecture Tools, infrastructure
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Do You Really Need Pre-Planning?
Consider if: Distributed teams Less experienced team High risk storiesMaybe not if: These activities can be part of iteration “Lean” approach
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Group Exercise
Given the following story or feature set, what do you think is the “steel thread”? What features might be added on once the steel thread works?
As an Internet shopper, I want to select shipping options for my items during checkout and see the shipping cost. Assumptions: User has already entered shipping address.
User will be able to choose different options for different items. The options are USPS, Ground, 2 day and Overnight. PO Boxes are USPS only. Items > 20 lbs are Ground only. API to cost calculator available, takes postal code and weight.
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Iteration Kickoff Iteration Planning Tasks, estimates High level tests Examples Big picture Collaborate with customers Review with developers Test data
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Iteration Planning (1) Address stories in priority order If no pre-planning, product owner:
Explains purpose Gives examples of how it will be used Provides mockups, wireframes
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Iteration Planning (2) If not already done:
Steel thread exercise Evaluate story size
Break up if too large Watch for “scope creep”, “bling” Keep “big picture” in mind
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How Testers Contribute (1) Again, consider all viewpoints
Stakeholder User Programmer Technical writer
Focus on examples Suggest steel thread exercise Evaluate story size – break up if too big
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How Testers Contribute (2)
Ask questions What's the business goal? Can the user mess up? How do they fix it? Are we working with a vendor or specialist?
How do we coordinate testing? Can we obtain data for testing?
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Planning Tasks (1) Write development and testing cards
together Some teams start with tests
Some teams write testing tasks on development cards
Other teams write separate testing cards Color coding helpful
Physical or virtual
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Planning Tasks (2) Write cards for anything that might be
forgotten Unit tests Showing UI to customers Send test files to vendor
Write cards for performance, reliability, other 'ility' testing
Identify information needed for test cases Vendor API requirements
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Estimating Tasks Use hours (remember, just estimates!) Consider alternatives
Scale tasks so they're all one day's work Write big task card to be broken down
when more is known Be conservative Consider lean approach
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Testable Stories Think about how you can test each story Work from examples Team solves testing, testability problems
Ex. Way to override server date/time Design code in layers
Testable at each layer
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High Level Tests and Examples (1) Start with tests written together Start with “big picture” Turn examples into tests Lots of options
Spreadsheets Bullet points Graphical Use cases Matrix
Functionality 7
Functionality 6
Functionality 5
Functionality 4
Functionality 3
Functionality 2
Functionality 1
Product 2
Product 1
WarningsErrors
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High Level Tests and Examples (2) Capture somewhere entire team can see
Wiki Whiteboard
Use screenshots, mockups, visual aids Customer-friendly format Forms core of documentation Include non-functional requirements
eg. Security, usability
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High Level Tests and Examples (3) Review with developers
Face to face communication best When remote, use tools
As direct as possibleAdjust work schedule
Review with customers Collaborate closely
Leave details for later When coding starts
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Group ExerciseStory: As an Internet shopper, I want to select shipping
options for my items during checkout and see the shipping cost.
Divide your team into testers and customers. Write high level tests for the story. Use whatever
format and techniques you like. What are some examples of desired behavior? What would help make the story testable? What requirements might change later?
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Coding and Testing
Coding and testing are part of one process Write detailed, executable tests Collaborate with developers Automate tests Do exploratory testing Keep up
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Write Detailed Tests (1) High level tests get programmers started Don't let coding get way ahead of testing Write executable tests But think about exploratory testing
scenarios
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Write Detailed Tests (2) Start simple
Simplest happy-path test caseDeveloper helps automate
Once passing, add more complex tests Add passing tests to build
We can't keep up without automating regression tests
No time for manual exploratory testing without automation
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Driving Development with Tests All team members collaborate on stories
Focus on completing one story at a time Iterative process Revise tests as needed Use risk analysis as guide Power of three
Tester, developer, customer discuss questions, issues
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Dealing with Bugs Aim for zero-defect development Show developer the problem
Write bug if it might be forgotten Pair with developer to find bugs
Customer, too Look for patterns Use simplest tool for tracking bugs
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Testing Tasks
Anyone on team can take one Important if there's a crunch
If lacking automated regression tests - Everyone on team should do manual
regression tests, each iteration Great motivation for designing testable
code, solving automation problems
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Talk to Customers
Mock up UI's, reports Simply – on paper, whiteboard
Take time to understand the business Sit with customers Learn their jobs Get their input
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Regression Tests = Safety Net
Multiple builds Unit Functional
No build process? Team should
address Keep the builds
“green” Keep feedback loop
short
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Exploratory Testing
Lets you learn more about the features May produce more executable tests Leverage automation to facilitate Follow “smells”, your instincts Take notes, record results Time box
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Group ExerciseStory: As an Internet shopper, I want to select shipping
options for my items during checkout and see the shipping cost.
Pick a role and devise exploratory scenarios which that role might get into (don't limit yourself to the list below)
High-stakes gambler Blackjack dealer Blue Man Group Penn and/or Teller Stand-up comedian
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Successful Delivery
The End Game UAT Packaging Production support Training Customer expectations Releasing
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The End Game
Some teams release each iteration Others wait for enough value End game may be a few hours, or days Not a bug fix cycle Don't code right to the last minute Doesn't have to be panic mode
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User Acceptance Testing
Performed by all affected business groups Verify existing and new business
functionality Bugs deferred for future iterations
(except showstoppers) Shrink-wrapped software
Plan UAT at customer site Installation testing
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Staging Release
Test database changes, migrations Test with other systems
Inside, outside organization May be tied to client's release schedule Opportunity for final exploratory, end to end
testing Write task cards for release tasks Learn system down time required
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Deliverables (1)
Who's accepting the product? What are their expectations? EX. Sarbanes-Oxley compliance measures How much documentation is enough?
Who is it for? How are they using it?
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Deliverables (2)
Internal customers What will make their jobs easier?
Workflows to understand new featuresWorkarounds for problems
Training Formal training sessions Online help, tutorials
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Releasing (1)
Make product available to customers Update website Packaging Deliver custom app to customers Shrink-wrapped and delivered or
downloaded Start early
Acceptance criteria Define when product is “done” Enough value
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Releasing (2)
Release management may fall to testers Release readiness meeting Release readiness checklist Identify risks Understand impact on busines
Release notes Should fit needs of audience Useful for future tests
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Group Exercise
We're releasing the stories to allow shoppers to select shipping options and see the shipping costs during checkout. The shipper provides the API for the cost calculation. New columns will be added to the database to collect the shipping costs.
What events and activities would you plan for the staging release?
What might be some of the deliverables? What plans would you make to ensure a successful
production release?
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Wrap Up the Iteration
Iteration review Improving your team's process Celebrating success Dealing with change
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Iteration Review Demo completed stories to customers
Real, live, working code Customers can ask questions and give
feedback Sense of accomplishment
Testers may conduct the review
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Improving Your Process
Team retrospective, every iteration Review previous list of “start, stop, continue”
items Identify what worked, what didn't Write task cards or set guidelines to fix
issues Aim for steady, sustainable pace over
course of iteration
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Celebrate Successes Recognize achievements
3,000 Unit Tests Value delivered to business
Reward small accomplishments Celebrate individual successes Celebrate achievements of other teams as
well
No donkeys were harmedin the production of this tutorial
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Change Is Hard Need time, training to master new skills
Value quality over speed Build your credibility
Show how you add value Avoid “quality police” mentality
Find creative ways to encourage change Make it a team problem to solve Look for areas of greatest pain
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Group ExerciseWhat are you doing now to work more closely
with developers? With customers?Compile a “top three” list from your group to
share.
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Questions?
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Some Agile Testing Resourceslisa.crispin.home.att.netwww.agilealliance.orgwww.testing.comagile-testing@yahoogroups.comwww.fitnesse.orgwebtest.canoo.comfit.c2.com
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Exploratory Testing Resources
Testing Computer Software, Kaner Lessons Learned in Software Testing;
Kaner, Bach, Pettichord www.testinglessons.com http://groups.yahoo.com/group/software-
testing/ http://www.satisfice.com http://www.satisfice.com/articles/sbtm.pdf
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Agile Resources
User Stories Applied
by Mike Cohn
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Agile Resources
Agile Estimating and Planning
By Mike Cohn
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Collaboration
Collaboration Explained : Facilitation Skills for Software Project Leaders
By Jean Tabaka
Available on Amazon
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Implementing Change
Fearless Change: Patterns for introducing new ideas
By Linda Rising and Mary Lynn Manns
Available on Amazon
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Agile Testing Resources
Available on Amazon
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Coming in 2009!
Agile Testing: The Role of the Tester in Agile Projects
By Lisa Crispin and Janet Gregory www.agiletester.ca
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Goal
Have fun, whatever you do!