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Scaling Mobile Development

Stephanie Shupe @steph_shupe

Software Engineer, Lookout

October 10, 2014

#GHC14

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Development Team Evolution

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Development Team Evolution

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Development Team Evolution

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Development Team Evolution

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Development Team Evolution

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Outline

§  Lookout Case Study §  Tools to scale mobile development §  Key Recommendations

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Lookout iOS App Case Study

§  New Product ~2011

§  Team grew from 1 to 6 developers

§  Processes developed as team grew in size

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Lookout iOS App Versions

0

0.5

1

1.5

2

2.5

3

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App Versions v. Developers

0

1

2

3

4

5

6

7

Sep-11 Jun-12 Mar-13 Dec-13 Sep-14

iOS App Version Developers

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App Versions v. Developers

0

1

2

3

4

5

6

7

Sep-11 Jun-12 Mar-13 Dec-13 Sep-14

iOS App Version Developers

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Tools for any size team Process / Tool 1 dev 2-4 devs 5+ devs Version Control l l l Planning Tool m m l Unit Testing l l l Code Review Tool m l Integration Testing m l Automated UI Testing m m l Continuous Integration m l Localization Tool m Code Style Guideline l Release Process l

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Workflow

New Task

Write Code •  Write

Tests •  Localize*

Verify Code •  Build

Project •  Run Tests

Peer Review

Commit Code

Release to Market •  Quality

Assurance

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Workflow

New Task

Write Code •  Localize* •  Write

Tests

Verify Code •  Build

Project •  Run Tests

Peer Review

Commit Code

Release to Market •  Quality

Assurance

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Planning Tool

§  Lightweight −  Whiteboard −  To-Do Lists

§  Heavyweight −  Task Managing Software / Website

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Planning Tool

https://www.atlassian.com/software/jira

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Planning Tool

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Workflow

New Task

Write Code •  Write

Tests •  Localize*

Verify Code •  Build

Project •  Run Tests

Peer Review

Commit Code

Release to Market •  Quality

Assurance

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Writing Code…

My project no longer

compiles?!

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Version Control

git-scm.com github.com

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Version Control

github.com

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Writing Code…

What’s the style?

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Code Style Guideline

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Writing Code…

Wir haben andere

Sprachen?

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Localization Management

§  Lightweight −  Email strings files back and forth

§  Heavyweight −  Localization Tool

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Localization Tool

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Localization Tool

§  Command line tool § Graphical interface for translators §  Cross-project translation database

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Writing Code…

Something is broken, but I don’t know why!

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Unit Testing describe(@"+isExpired:",  ^{          context(@"when  date  occurred  in  past",  ^{                  beforeEach(^{                          subject  =  [NSDate  dateWithTimeIntervalSinceNow:-­‐10];                  });                  it(@"should  return  expired",  ^{                          [[theValue([NSDate  isExpired:subject])  should]  beYes];                  });          });          context(@"when  date  occurs  in  future",  ^{                  beforeEach(^{                          subject  =  [NSDate  dateWithTimeIntervalSinceNow:1000000];                  });                  it(@"should  return  not  expired",  ^{                          [[theValue([NSDate  isExpired:subject])  should]  beNo];                  });          });  });  

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Integration Testing context(@"when  a  request  is  made  with  malformed  data",  ^{                  it(@"should  return  an  error",  ^AsyncBlock  {  

     Request  *request  =  [Request  new];    

     ...                                                                                                                  

     expect(error).toNot.beNil();                                                                                  

     expect(httpResponse.statusCode).to.equal(500);                                                                                                                          

     [client  enqueueRequest:request];                });  });  

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Automated User Interface Testing

§  Automates Manual Tests §  Test the same app you submit to the

marketplace

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Automated User Interface Testing

Run Tests

Generate Screen shots

Linguistic Verification

Quality Assurance

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Automated User Interface Testing

§ Open Source §  Interacts with UI Elements §  Tests can be written in Ruby, Java, ObjC

https://saucelabs.com/appium

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Automated User Interface Testing

Language

English

Japanese

Russian

German

Spanish

French

Device Resolution (px)

480x320

960x640

1024x768

1136x640

1334x750

1920x1080

2048x1536

OS Version

iOS 6

iOS 7

iOS 8

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Automated User Interface Testing

6 languages x

7 supported device resolutions x

3 supported OS Versions

126 Combinations

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iOS App Crashes v. Automated Tests

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Workflow

New Task

Write Code •  Write

Tests •  Localize*

Verify Code •  Build

Project •  Run Tests

Peer Review

Commit Code

Release to Market •  Quality

Assurance

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Verifying Code

§  Lightweight −  Manually compile project −  Manually run tests −  Minimal Continuous Integration

§  Heavyweight −  Continuous Integration

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Continuous Integration

http://jenkins-ci.org/

§  Build project −  pre- or post- code check in

§  Run test suites §  Report back status §  Code Review plugin support

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Continuous Integration

http://jenkins-ci.org/

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Workflow

New Task

Write Code •  Write

Tests •  Localize*

Verify Code •  Build

Project •  Run Tests

Peer Review

Commit Code

Release to Market •  Quality

Assurance

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Reviewing Code…

How do I know that

this code is any good?

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Code Review Tool

https://code.google.com/p/gerrit/

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Code Review Tool

Push Code

•  git push gerrit HEAD:refs/publish/master

Gerrit •  Kick off Jenkins Build* •  Code review interface

Jenkins •  Task number? •  Project builds? •  Tests pass?

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Workflow

New Task

Write Code •  Write

Tests •  Localize*

Verify Code •  Build

Project •  Run Tests

Peer Review

Commit Code

Release to Market •  Quality

Assurance

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Committing Code…

I’ve committed,

so I’m done.

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Workflow

New Task

Write Code •  Write

Tests •  Localize*

Verify Code •  Build

Project •  Run Tests

Peer Review

Commit Code

Release to Market •  Quality

Assurance

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Releasing Code…

There isn’t a magical ‘Release’ button?

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Release Process

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Tools for any size team Process / Tool 1 dev 2-4 devs 5+ devs Version Control l l l Planning Tool m m l Unit Testing l l l Code Review Tool m l Integration Testing m l Automated UI Testing m m l Continuous Integration m l Localization Tool m Code Style Guideline l Release Process l

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Lookout’s Mobile Dev Toolbelt Process / Tool What Lookout Uses Version Control Git Planning Tool JIRA Unit Testing JUnit, Kiwi Code Review Tool Gerrit Integration Testing Robotium, Specta Automated User Interface Testing Appium Continuous Integration Jenkins Localization Tool Web Translate It (WTI) Code Style Guideline Google / Apple code style guidelines Release Process Wiki documents

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Additional tools to consider §  Code coverage §  Code guideline enforcement §  Automated releases §  Automated builder setup §  Crash tooling §  Error logging §  Agile Processes §  Performance testing §  Code Modularization §  Dependency Manager

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