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@alex_zhukovich https://alexzh.com/ UI Testing 
 Jetpack Compose apps

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No content

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ANDROID TESTS LOCAL INSTRUMENTATION

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ANDROID TESTS LOCAL INSTRUMENTATION UI* Non-UI

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ANDROID TESTS LOCAL INSTRUMENTATION UI* Non-UI UI Non-UI

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Good Test Case

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STABLE FAST READABLE INDEPENDENT

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Interaction Pixel perfectness

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INTERACTION PIXEL PERFECTNESS

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INTERACTION PIXEL PERFECTNESS

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PIXEL PERFECTNESS INTERACTION TESTING UI COMPONENTS 
 (DESIGN SYSTEM) INTERACTION WITH SCREEN(S) SUPPORT MULTIPLE LANGUAGES SUPPORT DIFFERENT 
 COLOR THEMES SUPPORT ACCESSIBILITY OPTIONS 
 (FONT SIZE, SCREEN SIZE, ETC) SUPPORT LTR & RTL PERMISSION TESTING YES YES YES YES YES YES YES YES

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SCREENSHOT TESTS FUNCTIONAL TESTS END TO END TESTS

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FUNCTIONAL TESTS END TO END TESTS SCREENSHOT TESTS

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FUNCTIONAL TESTS END TO END TESTS SCREENSHOT TESTS

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FUNCTIONAL TESTS END TO END TESTS SCREENSHOT TESTS

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END-TO-END TESTS FUNCTIONAL TESTS SCREENSHOT TESTS

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State of Android Dev & Testing

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ACTIVITY FRAGMENT

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ACTIVITY FRAGMENT COMPOSABLE FUNCTION

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launchActivity launchFragmentInContainer ComposeContentTestRule ActivityScenario.launch( MainActivity::class.java )

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launchActivity launchFragmentInContainer ComposeContentTestRule val activityOptions = bundleOf( Pair("param-1", 1), Pair("param-2", 2), Pair("param-3", 3), ) val scenario = ActivityScenario.launch( MainActivity::class.java, activityOptions ) scenario.moveToState(Lifecycle.State.STARTED) ActivityScenario.launch(

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launchActivity launchFragmentInContainer ComposeContentTestRule val scenario = launchFragmentInContainer( fragmentArgs: Bundle? = null, @StyleRes themeResId: Int = 
 R.style.FragmentScenarioEmptyFragmentActivityTheme, initialState: Lifecycle.State = 
 Lifecycle.State.RESUMED, factory: FragmentFactory? = null ) scenario.moveToState(Lifecycle.State.STARTED) debugImplementation "androidx.fragment:fragment-testing:1.4.0"

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launchActivity launchFragmentInContainer ComposeContentTestRule Activity Fragment

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launchActivity launchFragmentInContainer ComposeContentTestRule androidx.fragment.app.testing.FragmentScenario$EmptyFragmentActivity Activity Fragment Compilation Added to AndroidManifest

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launchActivity launchFragmentInContainer ComposeContentTestRule @get:Rule val composeTestRule = createComposeRule() composeTestRule.apply { setContent { LoginScreen() } onNodeWithTag("email") .performTextInput("[email protected]") onNodeWithTag("password") .performTextInput("password") onNodeWithTag("login") .performClick() ... } debugImplementation "androidx.compose.ui:ui-test-manifest:1:0:5"

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launchActivity launchFragmentInContainer ComposeContentTestRule Component Activity @Composable

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launchActivity launchFragmentInContainer ComposeContentTestRule androidx.activity.ComponentActivity Component Activity @Composable Compilation Added to AndroidManifest

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NO ID 
 OF COMPONENT SEMANTIC PROPERTIES VIRTUAL CLOCK

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Testing Composable code

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CREATE COMPOSE RULE CREATE EMPTY COMPOSE RULE CREATE ANDROID COMPOSE RULE

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class SubscribeBoxTest { @get:Rule val composeTestRule = createComposeRule() @Test fun shouldDisplaySnackbar_whenEmailIsEnteredAndSubscribeClicked() { composeTestRule.apply { setContent { SubscribeBox() } onNode(hasTestTag("subscribe_email")) .performTextInput("[email protected]") onNode(hasText("SUBSCRIBE")) .performClick() onNode(hasText("You successfully subscribed")) .assertIsDisplayed() } } }

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class SubscribeBoxTest { @get:Rule val composeTestRule = createComposeRule() @Test fun shouldDisplaySnackbar_whenEmailIsEnteredAndSubscribeClicked() { composeTestRule.apply { setContent { SubscribeBox() } onNode(hasTestTag("subscribe_email")) .performTextInput("[email protected]") onNode(hasText("SUBSCRIBE")) .performClick() onNode(hasText("You successfully subscribed")) .assertIsDisplayed() } } } Finder Matcher

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class SubscribeBoxTest { @get:Rule val composeTestRule = createComposeRule() @Test fun shouldDisplaySnackbar_whenEmailIsEnteredAndSubscribeClicked() { composeTestRule.apply { setContent { SubscribeBox() } onNode(hasTestTag("subscribe_email")) .performTextInput("[email protected]") onNode(hasText("SUBSCRIBE")) .performClick() onNode(hasText("You successfully subscribed")) .assertIsDisplayed() } } } Finder Matcher Action

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class SubscribeBoxTest { @get:Rule val composeTestRule = createComposeRule() @Test fun shouldDisplaySnackbar_whenEmailIsEnteredAndSubscribeClicked() { composeTestRule.apply { setContent { SubscribeBox() } onNode(hasTestTag("subscribe_email")) .performTextInput("[email protected]") onNode(hasText("SUBSCRIBE")) .performClick() onNode(hasText("You successfully subscribed")) .assertIsDisplayed() } } } Finder Matcher Action Assertion

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MERGED NODE TREE UNMERGED NODE TREE Printing with useUnmergedTree = ‘false’ Node #1 at (l=0.0, t=74.0, r=1080.0, b=2012.0)px |-Node #2 at (l=247.0, t=956.0, r=834.0, b=1130.0)px Role = 'Button' Focused = 'false' ContentDescription = '[Schedule a task]' Text = '[Schedule a task]' Actions = [OnClick, GetTextLayoutResult] MergeDescendants = 'true' Printing with useUnmergedTree = ‘true’ Node #1 at (l=0.0, t=74.0, r=1080.0, b=2012.0)px |-Node #2 at (l=247.0, t=956.0, r=834.0, b=1130.0)px Role = 'Button' Focused = 'false' Actions = [OnClick] MergeDescendants = 'true' |-Node #4 at (l=321.0, t=1006.0, r=395.0, b=1080.0)px | ContentDescription = '[Schedule a task]' | Role = 'Image' |-Node #5 at (l=420.0, t=1014.0, r=785.0, b=1072.0)px Text = '[Schedule a task]' Actions = [GetTextLayoutResult]

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MERGED NODE TREE UNMERGED NODE TREE Printing with useUnmergedTree = ‘true’ Node #1 at (l=0.0, t=74.0, r=1080.0, b=2012.0)px |-Node #2 at (l=247.0, t=956.0, r=834.0, b=1130.0)px Role = 'Button' Focused = 'false' Actions = [OnClick] MergeDescendants = 'true' |-Node #4 at (l=321.0, t=1006.0, r=395.0, b=1080.0)px | ContentDescription = '[Schedule a task]' | Role = 'Image' |-Node #5 at (l=420.0, t=1014.0, r=785.0, b=1072.0)px Text = '[Schedule a task]' Actions = [GetTextLayoutResult] Printing with useUnmergedTree = ‘false’ Node #1 at (l=0.0, t=74.0, r=1080.0, b=2012.0)px |-Node #2 at (l=247.0, t=956.0, r=834.0, b=1130.0)px Role = 'Button' Focused = 'false' ContentDescription = '[Schedule a task]' Text = '[Schedule a task]' Actions = [OnClick, GetTextLayoutResult] MergeDescendants = 'true' onRoot(useUnmergedTree = false) 
 .printToLog("MERGED") onRoot(useUnmergedTree = true) .printToLog("UNMERGED")

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MERGED NODE TREE UNMERGED NODE TREE onNode(hasText("Schedule a task"), useUnmergedTree = true) .assertHasClickAction() Error onNode(hasText("Schedule a task")) .assertHasClickAction() useUnmergedTree = false Printing with useUnmergedTree = ‘true’ Node #1 at (l=0.0, t=74.0, r=1080.0, b=2012.0)px |-Node #2 at (l=247.0, t=956.0, r=834.0, b=1130.0)px Role = 'Button' Focused = 'false' Actions = [OnClick] MergeDescendants = 'true' |-Node #4 at (l=321.0, t=1006.0, r=395.0, b=1080.0)px | ContentDescription = '[Schedule a task]' | Role = 'Image' |-Node #5 at (l=420.0, t=1014.0, r=785.0, b=1072.0)px Text = '[Schedule a task]' Actions = [GetTextLayoutResult] Printing with useUnmergedTree = ‘false’ Node #1 at (l=0.0, t=74.0, r=1080.0, b=2012.0)px |-Node #2 at (l=247.0, t=956.0, r=834.0, b=1130.0)px Role = 'Button' Focused = 'false' ContentDescription = '[Schedule a task]' Text = '[Schedule a task]' Actions = [OnClick, GetTextLayoutResult] MergeDescendants = 'true' onRoot(useUnmergedTree = false) 
 .printToLog("MERGED") onRoot(useUnmergedTree = true) .printToLog("UNMERGED")

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onAllNodesWithText(“＋")[1] .performClick() .performClick() onAllNodes(hasText(“＋"))[0] .performClick() onNode(hasText("Pay (€ 18.5)")) .assertIsDisplayed()

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Node #1 at (l=0.0, t=74.0, r=1080.0, b=1188.0)px |-Node #2 at (l=0.0, t=74.0, r=1080.0, b=1016.0)px | VerticalScrollAxisRange = 'ScrollAxisRange(value=0.0, maxValue=0.0, reverseScrolling=false)' | CollectionInfo = 'androidx.compose.ui.semantics.CollectionInfo@75c2267' | Actions = [IndexForKey, ScrollBy, ScrollToIndex] | |-Node #4 at (l=271.0, t=99.0, r=907.0, b=173.0)px | | Text = '[Americano]' | | Actions = [GetTextLayoutResult] | |-Node #5 at (l=271.0, t=185.0, r=907.0, b=345.0)px | | Text = '[Americano is ...]' | | Actions = [GetTextLayoutResult] | |-Node #6 at (l=932.0, t=99.0, r=1055.0, b=360.0)px | | |-Node #7 at (l=932.0, t=99.0, r=1055.0, b=186.0)px | | | Focused = 'false' | | | Text = '[＋]' | | | Actions = [OnClick, GetTextLayoutResult] | | | MergeDescendants = 'true' | | |-Node #10 at (l=976.0, t=186.0, r=1011.0, b=273.0)px | | | Text = '[0]' | | | Actions = [GetTextLayoutResult] | | |-Node #11 at (l=932.0, t=273.0, r=1055.0, b=360.0)px | | Focused = 'false' | | Text = '[—]' | | Actions = [OnClick, GetTextLayoutResult] | | MergeDescendants = 'true' | |-Node #14 at (l=271.0, t=413.0, r=907.0, b=487.0)px | | Text = '[Cappuccino]' | | Actions = [GetTextLayoutResult] | |-Node #15 at (l=271.0, t=499.0, r=907.0, b=659.0)px | | Text = '[A cappuccino is ...]’ | | Actions = [GetTextLayoutResult] | |-Node #16 at (l=932.0, t=413.0, r=1055.0, b=674.0)px | | |-Node #17 ... | | |-Node #20 ... | | |-Node #21 ... | |-Node #24 at (l=271.0, t=727.0, r=907.0, b=801.0)px | | Text = '[Espresso]' | | Actions = [GetTextLayoutResult] | |-Node #25 at (l=271.0, t=813.0, r=907.0, b=973.0)px | | Text = '[Espresso is ...]’ | | Actions = [GetTextLayoutResult] | |-Node #26 at (l=932.0, t=727.0, r=1055.0, b=988.0)px | |-Node #27 ... | |-Node #30 ... | |-Node #31 ... |-Node #3 at (l=49.0, t=1065.0, r=1031.0, b=1139.0)px Text = '[Pay (€ 0)]' Actions = [GetTextLayoutResult]

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Node #1 at (l=0.0, t=74.0, r=1080.0, b=1188.0)px

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Node #1 at (l=0.0, t=74.0, r=1080.0, b=1188.0)px |-Node #2 at (l=0.0, t=74.0, r=1080.0, b=1016.0)px | VerticalScrollAxisRange = 'ScrollAxisRange(value=0.0, maxValue=0.0, reverseScrolling=false)' | CollectionInfo = 'androidx.compose.ui.semantics.CollectionInfo@75c2267' | Actions = [IndexForKey, ScrollBy, ScrollToIndex] | |-Node #4 at (l=25.0, t=99.0, r=1055.0, b=360.0)px | | |-Node #5 at (l=271.0, t=99.0, r=907.0, b=173.0)px | | | Text = '[Americano]' | | | Actions = [GetTextLayoutResult] | | |-Node #6 at (l=271.0, t=185.0, r=907.0, b=345.0)px | | | Text = '[Americano is ...]’ | | | Actions = [GetTextLayoutResult] | | |-Node #7 at (l=932.0, t=99.0, r=1055.0, b=360.0)px | | |-Node #8 at (l=932.0, t=99.0, r=1055.0, b=186.0)px | | | Focused = 'false' | | | Text = '[＋]' | | | Actions = [OnClick, GetTextLayoutResult] | | | MergeDescendants = 'true' | | |-Node #11 at (l=976.0, t=186.0, r=1011.0, b=273.0)px | | | Text = '[0]' | | | Actions = [GetTextLayoutResult] | | |-Node #12 at (l=932.0, t=273.0, r=1055.0, b=360.0)px | | Focused = 'false' | | Text = '[—]' | | Actions = [OnClick, GetTextLayoutResult] | | MergeDescendants = 'true' | |-Node #15 at (l=25.0, t=413.0, r=1055.0, b=674.0)px | | |-Node #16 at (l=271.0, t=413.0, r=907.0, b=487.0)px | | | Text = '[Cappuccino]' | | | Actions = [GetTextLayoutResult] | | |-Node #17 at (l=271.0, t=499.0, r=907.0, b=659.0)px | | | Text = '[A cappuccino is ...]’ | | | Actions = [GetTextLayoutResult] | | |-Node #18 at (l=932.0, t=413.0, r=1055.0, b=674.0)px | | |-Node #19 ... | | |-Node #22 ... | | |-Node #23 ... | |-Node #26 at (l=25.0, t=727.0, r=1055.0, b=988.0)px | |-Node #27 at (l=271.0, t=727.0, r=907.0, b=801.0)px | | Text = '[Espresso]' | | Actions = [GetTextLayoutResult] | |-Node #28 at (l=271.0, t=813.0, r=907.0, b=973.0)px | | Text = '[Espresso is ...]’ | | Actions = [GetTextLayoutResult] | |-Node #29 at (l=932.0, t=727.0, r=1055.0, b=988.0)px | |-Node #30 ... | |-Node #33 ... | |-Node #34 ... |-Node #3 at (l=49.0, t=1065.0, r=1031.0, b=1139.0)px Text = '[Pay (€ 0)]' Actions = [GetTextLayoutResult] Modifier.semantics(mergeDescendants = false) {}

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Modifier.semantics(mergeDescendants = false) {} class CoffeeDrinksTest { @get:Rule val composeTestRule = createComposeRule() @Test fun coffeeDrinksAreNotAddedToBasket_whenCoffeeAddedToBasket_thenPaymentAmountRecalculated() { composeTestRule.apply { setContent { CoffeeDrinksWithBasket(drinks = coffeeDrinks) } onNode(withIncrementForCoffeeDrink("Espresso")) .performClick() onNode(withIncrementForCoffeeDrink("Americano")) .performClick() onNodeWithIncrementForCoffeeDrink("Americano") .performClick() onNode(hasText("Pay (€ 18.5)”)) .assertIsDisplayed() } } } fun withIncrementForCoffeeDrink(text: String): SemanticsMatcher { return hasText("＋") .and(hasAnyAncestor(hasAnyChild(hasText(text)))) } fun SemanticsNodeInteractionsProvider.onNodeWithIncrementForCoffeeDrink(text: String) = onNode(withIncrementForCoffeeDrink(text))

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Modifier.semantics(mergeDescendants = false) {} class CoffeeDrinksTest { @get:Rule val composeTestRule = createComposeRule() @Test fun coffeeDrinksAreNotAddedToBasket_whenCoffeeAddedToBasket_thenPaymentAmountRecalculated() { composeTestRule.apply { setContent { CoffeeDrinksWithBasket(drinks = coffeeDrinks) } onNode(withIncrementForCoffeeDrink("Espresso")) .performClick() onNode(withIncrementForCoffeeDrink("Americano")) .performClick() onNodeWithIncrementForCoffeeDrink("Americano") .performClick() onNode(hasText("Pay (€ 18.5)”)) .assertIsDisplayed() } } } fun withIncrementForCoffeeDrink(text: String): SemanticsMatcher { return hasText("＋") .and(hasAnyAncestor(hasAnyChild(hasText(text)))) } fun SemanticsNodeInteractionsProvider.onNodeWithIncrementForCoffeeDrink(text: String) = onNode(withIncrementForCoffeeDrink(text))

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@Preview @Composable fun Preview_MultipleRadioButtons() { val selectedValue = remember { mutableStateOf("") } val isSelectedItem: (String) -> Boolean = { selectedValue.value == it } val onChangeState: (String) -> Unit = { selectedValue.value = it } val items = listOf("Item 1", "Item 2", "Item 3", "Item 4", "Item 5") Column(Modifier.padding(8.dp)) { Text(text = "Selected value: ${selectedValue.value.ifEmpty { "NONE" }}") items.forEach { item -> Row( verticalAlignment = Alignment.CenterVertically, modifier = Modifier.selectable( selected = isSelectedItem(item), onClick = { onChangeState(item) }, role = Role.RadioButton ).padding(8.dp) ) { RadioButton( selected = isSelectedItem(item), onClick = null ) Text( text = item, modifier = Modifier.fillMaxWidth() ) } } } }

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@Preview @Composable fun Preview_MultipleRadioButtons() { val selectedValue = remember { mutableStateOf("") } val isSelectedItem: (String) -> Boolean = { selectedValue.value == it } val onChangeState: (String) -> Unit = { selectedValue.value = it } val items = listOf("Item 1", "Item 2", "Item 3", "Item 4", "Item 5") Column(Modifier.padding(8.dp)) { Text(text = "Selected value: ${selectedValue.value.ifEmpty { "NONE" }}") items.forEach { item -> Row( verticalAlignment = Alignment.CenterVertically, modifier = Modifier.selectable( selected = isSelectedItem(item), onClick = { onChangeState(item) }, role = Role.RadioButton ).padding(8.dp) ) { RadioButton( selected = isSelectedItem(item), onClick = null ) Text( text = item, modifier = Modifier.fillMaxWidth() ) } } } }

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@ExperimentalFoundationApi class RadioButtonTest { @get:Rule val composeTestRule = createComposeRule() @Test fun firstItemSelectedByDefault_whenThirdItemIsSelected_thenSelectedValueDisplayed() { composeTestRule.apply { setContent { Demo_RadioButton () } onNodeWithRoleAndText(Role.RadioButton, "Item 1") .assertIsSelected() onNodeWithText("Item 3") .performClick() onNodeWithRoleAndText(Role.RadioButton, "Item 3") .assertIsSelected() onNodeWithText("Selected value: Item 3") .assertIsDisplayed() } } private fun withRole(role: Role): SemanticsMatcher { return SemanticsMatcher("${SemanticsProperties.Role.name} contains '$role'") { it.config.getOrNull(SemanticsProperties.Role) == role } } private fun SemanticsNodeInteractionsProvider.onNodeWithRoleAndText( role: Role, text: String ) = onNode( withRole(role) .and(isSelectable()) .and(isEnabled()) .and(hasText(text)) ) }

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@ExperimentalFoundationApi class RadioButtonTest { @get:Rule val composeTestRule = createComposeRule() @Test fun firstItemSelectedByDefault_whenThirdItemIsSelected_thenSelectedValueDisplayed() { composeTestRule.apply { setContent { Demo_RadioButton () } onNodeWithRoleAndText(Role.RadioButton, "Item 1") .assertIsSelected() onNodeWithText("Item 3") .performClick() onNodeWithRoleAndText(Role.RadioButton, "Item 3") .assertIsSelected() onNodeWithText("Selected value: Item 3") .assertIsDisplayed() } } private fun withRole(role: Role): SemanticsMatcher { return SemanticsMatcher("${SemanticsProperties.Role.name} contains '$role'") { it.config.getOrNull(SemanticsProperties.Role) == role } } private fun SemanticsNodeInteractionsProvider.onNodeWithRoleAndText( role: Role, text: String ) = onNode( withRole(role) .and(isSelectable()) .and(isEnabled()) .and(hasText(text)) ) }

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COLUMN LAZY COLUMN val amount = 1_000 LazyColumn( modifier = Modifier.testTag("list") ) { items(amount) { Row( modifier = Modifier.padding(8.dp) ) { Text(text = "Item $it", fontSize = 20.sp) } } } val amount = 1_000 Column( modifier = Modifier.testTag("list") ) { (1..amount).forEach { Row( modifier = Modifier.padding(8.dp) ) { Text(text = "Item $it", fontSize = 20.sp) } } }

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COLUMN ADD UI val amount = 1_000 Column( modifier = Modifier.testTag("list") ) { (0..amount).forEach { Row( modifier = Modifier.padding(8.dp) ) { Text(text = "Item $it", fontSize = 20.sp) } } } onNode(hasText("Item 14")) .assertIsDisplayed() onNode(hasTestTag("list")) .performScrollToIndex(80) onNode(hasText("Item 80")) .assertIsDisplayed() Scroll actions: performScrollToNode(hasText("Item 80”)) performScrollToIndex(80) 15 ITEMS ARE DISPLAYED ALL ITEMS ARE EXIST

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LAZY COLUMN ADD UI val amount = 1_000 LazyColumn( modifier = Modifier.testTag("list") ) { items(amount) { Row( modifier = Modifier.padding(8.dp) ) { Text(text = "Item $it", fontSize = 20.sp) } } } onNode(hasText("Item 14")) .assertIsDisplayed() onNode(hasTestTag("list")) .performScrollToIndex(80) onNode(hasText("Item 80")) .assertIsDisplayed() Scroll actions: performScrollToNode(hasText("Item 80”)) performScrollToIndex(80) 15 ITEMS ARE DISPLAYED 15 ITEMS ARE EXIST

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class TextTest { @get:Rule val composeTestRule = createComposeRule() @Test fun chapter1IsSelectedByDefault_whenSwipeLeftTheSecondAndThirdChapterIsDisplayed() { composeTestRule.apply { setContent { val content = listOf( listOf("Lorem ipsum ...", ...), listOf(...), listOf(...) ) Demo_capitalizeTheFirstLetterOfBookChapter(content) } onNodeWithText("Chapter 1") .assertIsDisplayed() onNode(hasSelectableGroup()) .performTouchInput { swipeLeft() } onNodeWithText("Chapter 2") .assertIsDisplayed() onNode(hasSelectableGroup()) .performTouchInput { swipeLeft() } onNodeWithText("Chapter 3") .assertIsDisplayed() } } fun hasSelectableGroup() = SemanticsMatcher.keyIsDefined(SemanticsProperties.SelectableGroup) }

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class TextTest { @get:Rule val composeTestRule = createComposeRule() @Test fun chapter1IsSelectedByDefault_whenSwipeLeftTheSecondAndThirdChapterIsDisplayed() { composeTestRule.apply { setContent { val content = listOf( listOf("Lorem ipsum ...", ...), listOf(...), listOf(...) ) Demo_capitalizeTheFirstLetterOfBookChapter(content) } onNodeWithText("Chapter 1") .assertIsDisplayed() onNode(hasSelectableGroup()) .performTouchInput { swipeLeft() } onNodeWithText("Chapter 2") .assertIsDisplayed() onNode(hasSelectableGroup()) .performTouchInput { swipeLeft() } onNodeWithText("Chapter 3") .assertIsDisplayed() } } fun hasSelectableGroup() = SemanticsMatcher.keyIsDefined(SemanticsProperties.SelectableGroup) }

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ENABLE/DISABLE SYNCHRONIZATION ADVANCE TIME BY A SPECIFIC DURATION IDLING RESOURCES SUPPORT

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class AnimationTest { @get:Rule val composeTestRule = createComposeRule() @Test fun coffeeDrinkAnimation() { composeTestRule.apply { setContent { CoffeeDrinkAnimationBox() } composeTestRule.mainClock.autoAdvance = false compareScreenshot(composeTestRule, "test-state-0") composeTestRule.mainClock.advanceTimeBy(150) compareScreenshot(composeTestRule, "test-state-1") composeTestRule.mainClock.advanceTimeBy(200) compareScreenshot(composeTestRule, "test-state-2") composeTestRule.mainClock.advanceTimeBy(400) compareScreenshot(composeTestRule, "test-state-3") composeTestRule.mainClock.advanceTimeBy(600) compareScreenshot(composeTestRule, "test-state-4") composeTestRule.mainClock.advanceTimeBy(800) compareScreenshot(composeTestRule, "test-state-5") } } }

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Testing hybrid apps

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COMBINE MULTIPLE FRAMEWORKS IN A TEST COMBINE DIFFERENT APPROACHES USE DSL (DOMAIN- SPECIFIC-LANGUAGE)

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Best Practices

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USE MULTIPLE SMALL TESTS INSTEAD OF ONE BIG TEST

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ALL TEST CASES SHOULD BE INDEPENDENT

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NO "SLEEP" IN TESTS

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LEARN YOUR TOOLS

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#ExploreMore UI Testing @alex_zhukovich https://alexzh.com/