Slide 1

Slide 1 text

Pro builds in your small startup Nelson Osacky

Slide 2

Slide 2 text

About me • Android developer since before Uni • New to Berlin - Started working in September • Formerly at Square in San Francisco • Worked on Reader Experience, Square Register and build systems: Buck

Slide 3

Slide 3 text

Every build is a special snowflake

Slide 4

Slide 4 text

In the beginning there were no tests, no CI…

Slide 5

Slide 5 text

No content

Slide 6

Slide 6 text

No content

Slide 7

Slide 7 text

Why Travis? • Other engineering teams at Zenjob teams were already using it • Integrates easily with GitHub • Good Android examples and documentation • There’s a million options, this isn’t really the point.

Slide 8

Slide 8 text

How to add Travis? language: android jdk: - oraclejdk8 android: components: - tools - platform-tools - tools - build-tools-25.0.0 - android-26 script: ./gradlew assemble check notifications: email: false cache: directories: - $HOME/.gradle

Slide 9

Slide 9 text

Only ran checkstyle and unit tests

Slide 10

Slide 10 text

Next step: Boot emulator before_install: 
 - start emulator install: ./gradlew assemble before_script: android-wait-for-emulator script: ./gradlew check connectedCheck

Slide 11

Slide 11 text

before_install: # Install the system image. - sdkmanager “system-images;android-19;default;armeabi-v7a" # Create and start emulator for the script. # Meant to race the install task. - echo no | avdmanager create avd --force -n test -k "system- images;android-19;default;armeabi-v7a" - $ANDROID_HOME/emulator/emulator -avd test -no-audio -no-window &

Slide 12

Slide 12 text

Travis takes: 15 min 13 sec

Slide 13

Slide 13 text

Next: Run UI tests

Slide 14

Slide 14 text

Hard to debug • Button isn’t visible? Why? • No screenshots • Spoon doesn’t support AGP 3.0 (yet) • Screenshot on failure is tricky • Unsolved problem

Slide 15

Slide 15 text

After enabling our first UI test

Slide 16

Slide 16 text

No content

Slide 17

Slide 17 text

2 tests later

Slide 18

Slide 18 text

No content

Slide 19

Slide 19 text

Soon we had a problem

Slide 20

Slide 20 text

No content

Slide 21

Slide 21 text

Make the tests faster • Replace SystemClock.sleep() in tests with Espresso idling resources • Replace real API calls with mock API calls • Make mock API calls return instantly

Slide 22

Slide 22 text

Success…?

Slide 23

Slide 23 text

No content

Slide 24

Slide 24 text

Time to try something else

Slide 25

Slide 25 text

AWS Device Farm

Slide 26

Slide 26 text

• AWS Device Lab failed with cryptic error and no support • AWS Device Lab $10/hr • Firebase Test Lab $1/hr virtual and $5/hr real devices

Slide 27

Slide 27 text

Easy Decision

Slide 28

Slide 28 text

So much faster!

Slide 29

Slide 29 text

Why faster? • Do not have to download or install emulator • Emulator doesn’t slow down the rest of the build • Tests are now run on faster emulator

Slide 30

Slide 30 text

No content

Slide 31

Slide 31 text

111 secs = 1m 51 secs

Slide 32

Slide 32 text

No content

Slide 33

Slide 33 text

Can we go faster?

Slide 34

Slide 34 text

if [ "$COMPONENT" == "checkstyle" ]; then ./gradlew checkstyle elif [ "$COMPONENT" == "unit" ]; then ./gradlew test elif [ "$COMPONENT" == "lint" ]; then ./gradlew lint elif [ "$COMPONENT" == "release" ]; then ./gradlew assembleRelease elif [ "$COMPONENT" == "instrumentation" ]; then ./gradlew assembleDebug assembleAndroidTest .travis/run-ui-tests.sh else echo "This module doesn't exist" exit 1 fi

Slide 35

Slide 35 text

No content

Slide 36

Slide 36 text

Yes, but…

Slide 37

Slide 37 text

Faster individual builds but slower with multiple builds.

Slide 38

Slide 38 text

if [ "$COMPONENT" == "build" ]; then ./gradlew checkstyle check assembleRelease elif [ "$COMPONENT" == "instrumentation" ]; then ./gradlew assembleDebug assembleAndroidTest .travis/run-ui-tests.sh else echo "This module doesn't exist" exit 1 fi

Slide 39

Slide 39 text

No content

Slide 40

Slide 40 text

Less is more!

Slide 41

Slide 41 text

Problems solved!

Slide 42

Slide 42 text

…but then we wrote more UI tests

Slide 43

Slide 43 text

No content

Slide 44

Slide 44 text

60+ Tests, 11 mins

Slide 45

Slide 45 text

Sharding?

Slide 46

Slide 46 text

Flank!

Slide 47

Slide 47 text

• https://github.com/TestArmada/flank • Splits up UI tests amongst Firebase Test Lab devices • Splits up tests to minimize costs

Slide 48

Slide 48 text

Test time stays constant

Slide 49

Slide 49 text

No content

Slide 50

Slide 50 text

Prints out cost

Slide 51

Slide 51 text

Still one problem; manual uploads

Slide 52

Slide 52 text

Automation

Slide 53

Slide 53 text

before_deploy: # Verify that the apk was signed. - apksigner verify -v app/build/outputs/apk/release/app-release.apk # Publish to GitHub releases only on tagged commits. deploy: provider: releases api_key: secure: blah-blah-blah file: - "app/build/outputs/apk/debug/app-debug.apk" - "app/build/outputs/mapping/release/mapping.txt" - "app/build/outputs/apk/release/app-release.apk" skip_cleanup: true on: tags: true condition: $COMPONENT = build # Publish to Google Play after successful deployment to GitHub releases. after_deploy: - ./gradlew publishApkRelease

Slide 54

Slide 54 text

before_deploy: # Verify that the apk was signed. - apksigner verify -v app/build/outputs/apk/release/ app-release.apk

Slide 55

Slide 55 text

before_deploy: # Verify that the apk was signed. - apksigner verify -v app/build/outputs/apk/release/app-release.apk # Publish to GitHub releases only on tagged commits. deploy: provider: releases api_key: secure: blah-blah-blah file: - "app/build/outputs/apk/debug/app-debug.apk" - "app/build/outputs/mapping/release/mapping.txt" - "app/build/outputs/apk/release/app-release.apk" skip_cleanup: true on: tags: true condition: $COMPONENT = build # Publish to Google Play after successful deployment to GitHub releases. after_deploy: - ./gradlew publishApkRelease

Slide 56

Slide 56 text

# Publish to GitHub releases only on tagged commits. deploy: provider: releases api_key: secure: blah-blah-blah file: - "app/build/outputs/apk/debug/app-debug.apk" - "app/build/outputs/mapping/release/mapping.txt" - "app/build/outputs/apk/release/app-release.apk" skip_cleanup: true on: tags: true condition: $COMPONENT = build

Slide 57

Slide 57 text

before_deploy: # Verify that the apk was signed. - apksigner verify -v app/build/outputs/apk/release/app-release.apk # Publish to GitHub releases only on tagged commits. deploy: provider: releases api_key: secure: blah-blah-blah file: - "app/build/outputs/apk/debug/app-debug.apk" - "app/build/outputs/mapping/release/mapping.txt" - "app/build/outputs/apk/release/app-release.apk" skip_cleanup: true on: tags: true condition: $COMPONENT = build # Publish to Google Play after successful deployment to GitHub releases. after_deploy: - ./gradlew publishApkRelease

Slide 58

Slide 58 text

No content

Slide 59

Slide 59 text

No content

Slide 60

Slide 60 text

Automatic upload to the play store

Slide 61

Slide 61 text

apply plugin: 'com.github.triplet.play' android { playAccountConfigs { defaultAccountConfig { jsonFile = file('keys.json') } } defaultConfig { playAccountConfig = playAccountConfigs.defaultAccountConfig } }

Slide 62

Slide 62 text

before_deploy: # Verify that the apk was signed. - apksigner verify -v app/build/outputs/apk/release/app-release.apk # Publish to GitHub releases only on tagged commits. deploy: provider: releases api_key: secure: blah-blah-blah file: - "app/build/outputs/apk/debug/app-debug.apk" - "app/build/outputs/mapping/release/mapping.txt" - "app/build/outputs/apk/release/app-release.apk" skip_cleanup: true on: tags: true condition: $COMPONENT = build # Publish to Google Play after successful deployment to GitHub releases. after_deploy: - ./gradlew publishApkRelease

Slide 63

Slide 63 text

# Publish to Google Play after successful deployment to GitHub releases. after_deploy: - ./gradlew publishApkRelease

Slide 64

Slide 64 text

No content

Slide 65

Slide 65 text

TODOs • Automate bumping version numbers • Run UI tests on more real devices with different APIs before release • Move to AWS or another service with faster machines

Slide 66

Slide 66 text

TODOs • Screenshots on failure ( should be built in) • Gradle plugin for Firebase tests • Gradle plugin for Flank (for running locally)

Slide 67

Slide 67 text

TODOs • Merge on green button • Automate release branch cutting • Speed up local builds (Buck?)

Slide 68

Slide 68 text

Thank you [email protected]
 https://www.zenjob.de/careers/