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Screenshot your Entire App with Screengrab and Firebase
Edward Dale
November 03, 2016
Technology
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Screenshot your Entire App with Screengrab and Firebase
Presentation from the GDG Munich Android meetup
Edward Dale
November 03, 2016
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Transcript
Screenshot your Entire App Edward Dale Freeletics © Edward Dale,
2016 1
Screenshot your Entire App with Screengrab and Firebase Edward Dale
Freeletics © Edward Dale, 2016 2
Find the bug(s) © Edward Dale, 2016 3
© Edward Dale, 2016 4
© Edward Dale, 2016 5
Some things are best verified visually ! Screenshot © Edward
Dale, 2016 6
Screenshots are useful for • Acceptance testing • Edge case
• Localization • Multiple devices • Regression testing © Edward Dale, 2016 7
Screenshot testing tools • Espresso tests • Dependency injection •
Dependency mocking • Screengrab • Firebase Cloud Test Lab for Android © Edward Dale, 2016 8
Espresso test setup @MediumTest public class BuyCoachScreenGrab { @Inject DummyUserManager
mUserManager; @Rule public ActivityTestRule<BuyCoachActivity> mActivityRule = new ActivityTestRule<>(BuyCoachActivity.class, false, false); © Edward Dale, 2016 9
Automated localized screenshots of your Android app on every device
Screengrab ▶ Fastlane ▶ Fabric ▶ Twitter Combination of command-line tool and classes used in tests © Edward Dale, 2016 10
Screengrab test @Test public void testTestimonialMale() { when(mUserManager.getUser().getGender()).thenReturn(Gender.MALE); mActivityRule.launchActivity(new Intent());
onView(withId(R.id.feature_pager_videos)).perform(scrollTo()); Screengrab.screenshot("buy_coach_male_testimonial"); } © Edward Dale, 2016 11
Screengrab test @Test public void testTestimonialMale() { when(mUserManager.getUser().getGender()).thenReturn(Gender.MALE); mActivityRule.launchActivity(new Intent());
onView(withId(R.id.feature_pager_videos)).perform(scrollTo()); Screengrab.screenshot("buy_coach_male_testimonial"); } @Test public void testTestimonialFemale() { when(mUserManager.getUser().getGender()).thenReturn(Gender.FEMALE); mActivityRule.launchActivity(new Intent()); onView(withId(R.id.feature_pager_videos)).perform(scrollTo()); Screengrab.screenshot("buy_coach_female_testimonial"); } © Edward Dale, 2016 12
Screengrab configuration app_package_name 'com.freeletics.debug' app_apk_path 'Freeletics-debug.apk' tests_apk_path 'Freeletics-debug-androidTest.apk' locales ['en-US',
'fr-FR', 'it-IT', 'de-DE', 'pt-PT', 'es-ES', 'tr-TR', 'ja-JA'] use_tests_in_classes ['com.freeletics.coach.view.BuyCoachScreenGrab'] © Edward Dale, 2016 13
Running Screengrab $ ./gradlew clean assembleDebug assembleDebugTest $ screengrab ©
Edward Dale, 2016 14
Firebase Cloud Test Lab for Android Test your app on
devices hosted in a Google datacenter. Combination of command-line tool and classes used in tests Also supports virtual devices © Edward Dale, 2016 15
Firebase Cloud Test Lab for Android Test your app on
devices hosted in a Google datacenter. Combination of command-line tool and classes used in tests Also supports virtual devices $€£¥ © Edward Dale, 2016 16
Firebase test @Test public void testTestimonialMale() { when(mUserManager.getUser().getGender()).thenReturn(Gender.MALE); Activity activity
= mActivityRule.launchActivity(new Intent()); onView(withId(R.id.feature_pager_videos)).perform(scrollTo()); ScreenShotter.takeScreenshot("buy_coach_male_testimonial", activity); } © Edward Dale, 2016 17
Screengrab Screengrab.screenshot("buy_coach_male_testimonial"); Firebase ScreenShotter.takeScreenshot("buy_coach_male_testimonial", activity); © Edward Dale, 2016 18
Running Firebase gcloud beta test android run --type instrumentation --app
Freeletics-debug.apk --test Freeletics-debug-androidTest.apk --device-ids Nexus6 --os-version-ids 21 --locales en-US,fr-FR,it-IT,de-DE,pt-PT,es-ES,tr-TR,ja-JA --orientations portrait --test-targets "class com.freeletics.coach.view.BuyCoachScreenGrab" Also possible to stick this in a YML configuration file. © Edward Dale, 2016 19
Screengrab vs Firebase Fight! © Edward Dale, 2016 20
Screengrab • ✅ Free • ✅ No waiting for a
free device • ❌ Limited by your devices © Edward Dale, 2016 21
Firebase • ✅ Easy to setup a test matrix •
✅ Fits well with a CI system • ❌ Have to wait your turn • ❌ Costs money • $5/hour for real device • $1/hour for virtual device © Edward Dale, 2016 22
My suggestion Use both © Edward Dale, 2016 23
Cross-platform test @Test public void testTestimonialMale() { when(mUserManager.getUser().getGender()).thenReturn(Gender.MALE); Activity activity
= mActivityRule.launchActivity(new Intent()); onView(withId(R.id.feature_pager_videos)).perform(scrollTo()); ScreenShotter.takeScreenshot("buy_coach_male_testimonial", activity); Screengrab.screenshot("buy_coach_male_testimonial"); } Screengrab for daily development Firebase for CI regression testing © Edward Dale, 2016 24
Thanks! Edward Dale (@scompt) Freeletics (We're hiring) © Edward Dale,
2016 25