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@TTGonda victoriagonda.com Getting Started With AndroidX Test Victoria Gonda

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@TTGonda victoriagonda.com Why Test? • Make changes with confidence • Living documentation • Encourages maintainable, clean code

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@TTGonda victoriagonda.com https://twitter.com/TTGonda/status/1100931379150360576

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@TTGonda victoriagonda.com https://twitter.com/TTGonda/status/1101298440552759297

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@TTGonda victoriagonda.com https://twitter.com/TTGonda/status/1101677434162814976

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@TTGonda victoriagonda.com https://twitter.com/TTGonda/status/1102010808324767744

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@TTGonda victoriagonda.com https://twitter.com/saraceni_br/status/1102643475793829888

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@TTGonda victoriagonda.com Victoria Gonda • Android Engineer at Buffer • Author and Editor at RayWenderlich.com • Chicago native • Hedgehog and cat owner • she/her

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@TTGonda victoriagonda.com Testing Tools • JUnit4 • JUnit5 • Retrofit-mock • Espresso • Mockito • Robolectric • Spek • KotlinTest • MockK • Kakao • Hiroaki • Barista • Biscotti • AndroidX Test

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@TTGonda victoriagonda.com AndroidX Test

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@TTGonda victoriagonda.com AndroidX Test • Includes some of the libraries you already know, plus some new ones • Aims to solve the issue of too many libraries • Can be run both on device or on the JVM

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@TTGonda victoriagonda.com What’s Inside?

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@TTGonda victoriagonda.com What’s Inside? • JUnit • Core • Espresso • Truth Assertions

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@TTGonda victoriagonda.com JUnit Core Espresso Truth

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@TTGonda victoriagonda.com

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@TTGonda victoriagonda.com JUnit Core Espresso Truth

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@TTGonda victoriagonda.com JUnit

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@TTGonda victoriagonda.com defaultConfig { testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } testImplementation ‘junit:junit:4.12' testImplementation 'androidx.test.ext:junit:1.1.0'

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@TTGonda victoriagonda.com @RunWith(AndroidJUnit4::class) class MainActivityTest

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@TTGonda victoriagonda.com val context = ApplicationProvider.getApplicationContext() val appName = context.getString(R.string.app_name)

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@TTGonda victoriagonda.com android { testOptions.unitTests.includeAndroidResources = true } testImplementation 'org.robolectric:robolectric:4.2.1'

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@TTGonda victoriagonda.com JUnit Core Espresso Truth

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@TTGonda victoriagonda.com Core

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@TTGonda victoriagonda.com @Test fun mainActivityLaunches() { ActivityScenario.launch(MainActivity::class.java) }

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@TTGonda victoriagonda.com val scenario = ActivityScenario .launch(MainActivity::class.java) scenario.moveToState(Lifecycle.State.CREATED) scenario.moveToState(Lifecycle.State.RESUMED) scenario.recreate() scenario.close()

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@TTGonda victoriagonda.com val scenario = ActivityScenario .launch(MainActivity::class.java) scenario.moveToState(Lifecycle.State.CREATED) scenario.moveToState(Lifecycle.State.RESUMED) scenario.recreate() scenario.close()

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@TTGonda victoriagonda.com val scenario = ActivityScenario .launch(MainActivity::class.java) scenario.moveToState(Lifecycle.State.CREATED) scenario.moveToState(Lifecycle.State.RESUMED) scenario.recreate() scenario.close()

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@TTGonda victoriagonda.com val scenario = ActivityScenario .launch(MainActivity::class.java) scenario.moveToState(Lifecycle.State.CREATED) scenario.moveToState(Lifecycle.State.RESUMED) scenario.recreate() scenario.close()

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@TTGonda victoriagonda.com @get:Rule val activityRule = ActivityScenarioRule(MainActivity::class.java) // in test function val scenario = activityRule.scenario

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@TTGonda victoriagonda.com @get:Rule val activityRule = ActivityScenarioRule(MainActivity::class.java) // in test function val scenario = activityRule.scenario

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@TTGonda victoriagonda.com testImplementation 'androidx.fragment:fragment-testing:1.1.0-alpha05'

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@TTGonda victoriagonda.com val fragmentScenario = FragmentScenario.launch(TaskFragment::class.java) fragmentScenario.moveToState(Lifecycle.State.RESUMED)

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@TTGonda victoriagonda.com val applicationInfo = ApplicationInfoBuilder .newBuilder() .setPackageName("com.victoriagonda.tasklist") .build() PackageInfoBuilder.newBuilder() .setApplicationInfo(applicationInfo) .build()

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@TTGonda victoriagonda.com JUnit Core Espresso Truth

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@TTGonda victoriagonda.com Espresso

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@TTGonda victoriagonda.com testImplementation 'androidx.test.espresso:espresso-core:3.1.1'

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@TTGonda victoriagonda.com ViewMatchers.withId ViewActions.click ViewAssertions.matches

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@TTGonda victoriagonda.com @Test fun mainActivityShowsAddButton() { val scenario = ActivityScenario .launch(MainActivity::class.java) onView(withId(R.id.buttonAddList)) .check(matches(isDisplayed())) }

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@TTGonda victoriagonda.com @Test fun mainActivityShowsAddButton() { val scenario = ActivityScenario .launch(MainActivity::class.java) onView(withId(R.id.buttonAddList)) .check(matches(isDisplayed())) }

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@TTGonda victoriagonda.com testImplementation 'androidx.test.espresso:espresso-intents:3.1.1' testImplementation 'androidx.test.espresso:espresso-contrib:3.1.1'

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) Intents.intended(IntentMatchers .hasComponent(DetailActivity::class.java.name)) Intents.release() }

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) Intents.intended(IntentMatchers .hasComponent(DetailActivity::class.java.name)) Intents.release() }

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) Intents.intended(IntentMatchers .hasComponent(DetailActivity::class.java.name)) Intents.release() }

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) Intents.intended(IntentMatchers .hasComponent(DetailActivity::class.java.name)) Intents.release() }

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) Intents.intended(IntentMatchers .hasComponent(DetailActivity::class.java.name)) Intents.release() }

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) Intents.intended(IntentMatchers .hasComponent(DetailActivity::class.java.name)) Intents.release() }

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) Intents.intended(IntentMatchers .hasComponent(DetailActivity::class.java.name)) Intents.release() }

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@TTGonda victoriagonda.com JUnit Core Espresso Truth

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@TTGonda victoriagonda.com Truth

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@TTGonda victoriagonda.com testImplementation 'androidx.test.ext:truth:1.1.0'

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) val intent = getIntents().first() IntentSubject.assertThat(intent) .hasComponentClass(DetailActivity::class.java) Intents.release() }

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@TTGonda victoriagonda.com @Test fun selectingListOpensDetailActivity() { ActivityScenario.launch(MainActivity::class.java) Intents.init() onView(withId(R.id.recyclerView)) .perform(RecyclerViewActions .actionOnItemAtPosition(0, click())) val intent = getIntents().first() IntentSubject.assertThat(intent) .hasComponentClass(DetailActivity::class.java) Intents.release() }

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@TTGonda victoriagonda.com val intent = DetailActivity.newIntent(tasklist, ApplicationProvider.getApplicationContext()) val bundleSubject: BundleSubject = assertThat(intent).extras() bundleSubject.containsKey("EXTRA_TASKLIST") val integerSubject: IntegerSubject = bundleSubject.integer("EXTRA_TASKLIST") integerSubject.isEqualTo(tasklist.id)

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@TTGonda victoriagonda.com fun newIntent(list: Tasklist, context: Context): Intent { return Intent(context, DetailActivity::class.java) .apply { putExtra("EXTRA_TASKLIST", list.id) } }

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@TTGonda victoriagonda.com val intent = DetailActivity.newIntent(tasklist, ApplicationProvider.getApplicationContext()) val bundleSubject: BundleSubject = assertThat(intent).extras() bundleSubject.containsKey("EXTRA_TASKLIST") val integerSubject: IntegerSubject = bundleSubject.integer("EXTRA_TASKLIST") integerSubject.isEqualTo(tasklist.id)

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@TTGonda victoriagonda.com val intent = DetailActivity.newIntent(tasklist, ApplicationProvider.getApplicationContext()) val bundleSubject: BundleSubject = assertThat(intent).extras() bundleSubject.containsKey("EXTRA_TASKLIST") val integerSubject: IntegerSubject = bundleSubject.integer("EXTRA_TASKLIST") integerSubject.isEqualTo(tasklist.id)

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@TTGonda victoriagonda.com val intent = DetailActivity.newIntent(tasklist, ApplicationProvider.getApplicationContext()) val bundleSubject: BundleSubject = assertThat(intent).extras() bundleSubject.containsKey("EXTRA_TASKLIST") val integerSubject: IntegerSubject = bundleSubject.integer("EXTRA_TASKLIST") integerSubject.isEqualTo(tasklist.id)

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@TTGonda victoriagonda.com value of : intent.getComponent().getClassName() expected : com.victoriagonda.android.tasklist.DetailActivity but was : com.victoriagonda.android.tasklist.MainActivity

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@TTGonda victoriagonda.com Wanted to match 1 intents. Actually matched 0 intents. IntentMatcher: has component: has component with: class name: is "com.victoriagonda.android.tasklist.DetailActivity" package name: an instance of java.lang.String short class name: an instance of java.lang.String Matched intents:[] Recorded intents: -Intent { cmp=com.victoriagonda.android.tasklist/.MainActivity (has extras) } handling packages:[[com.victoriagonda.android.tasklist]], extras:[Bundle[{EXTRA_TASKLIST=1}]])

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@TTGonda victoriagonda.com value of : intent.getExtras() expected to contain key EXTRA_TASKLIST but was : Bundle[{EXTRA_TASKNAME=Laundry}]

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@TTGonda victoriagonda.com value of : intent.getExtras().getInt(EXTRA_TASKLIST) expected : 4 but was : 5

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@TTGonda victoriagonda.com junit.framework.AssertionFailedError: Expected :4 Actual :5

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@TTGonda victoriagonda.com • MotionEvent • PointerCoords • PointerProperties • IntentCorrespondences • IntentCorrespondences • NotificationAction • Notification • PendingIntent

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@TTGonda victoriagonda.com Wrapping Up • Google wrapped up all testing under one AndroidX roof • Four parts, JUnit, Core, Espresso, Truth • Can ALL be run on or off device • Hopefully means less APIs to learn and less worry about on or off device

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@TTGonda victoriagonda.com Project Nitrogin?

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@TTGonda victoriagonda.com Thanks! https://vgonda.github.io/Talk-Resources/