Updated on 2026-08-14

.claude/skills/write-ui-test/SKILL.md

@@ -139,8 +139,10 @@ Delete anything explaining WHAT a step does.
 ## Reference docs
 
 - **`reference/compose-traps.md`** — read when the screen uses `PullToRefreshBox`,
-  `TangemHoldToConfirmButton`, a Decompose model that fetches in `init {}`, or a hot-wallet import with
-  an access code. These have silent failure modes that look like passing tests.
+  `TangemHoldToConfirmButton`, a Decompose model that fetches in `init {}`, a hot-wallet import with
+  an access code, or a target inside a **LazyColumn/LazyRow that may be below the fold** (use a
+  `KLazyListNode` matcher that auto-scrolls — never a manual swipe). These have silent failure modes that
+  look like passing tests.
 - **`reference/running-and-debugging.md`** — read when building, installing, running tests (orchestrator
   vs. raw `am instrument`), running against a local WireMock, interpreting CLI/Allure output, using
   `@Ignore`, or driving WireMock scenarios.

.claude/skills/write-ui-test/reference/compose-traps.md

@@ -95,6 +95,65 @@ fun walletNameValue(name: String) = child { withText(name); useUnmergedTree = tr
 fun walletNameValue(name: String) = child { hasText(name); useUnmergedTree = true }
 ```
 
+## LazyList item below the fold: plain `child { }` finds it but can't click it
+
+A `child { hasTestTag(ITEM); hasAnyDescendant(withText(name)) }` matcher resolves the semantics node
+even when the item is composed **off-screen** (LazyColumn keeps a few items past the viewport). But the
+node isn't displayed, so `clickWithAssertion()` (`assertIsDisplayed()` first) fails, or `performClick()`
+taps nothing. Symptom: the test passes when the item happens to be near the top and fails for items
+lower in the list — and a manual swipe "fixes" it. Do **not** patch with a swipe (flaky, the
+`clickableSingle` 500ms debounce can also eat fast programmatic clicks).
+
+**Whenever a target lives in a LazyColumn/LazyRow and might be below the fold, build a `KLazyListNode`
+matcher up front** — `childWith` scrolls the list to the item before returning it:
+
+```kotlin
+import com.tangem.common.utils.LazyListItemNode
+import com.tangem.core.ui.utils.LazyListItemPositionSemantics
+import io.github.kakaocup.compose.node.element.lazylist.KLazyListNode
+
+private val tokensList = KLazyListNode(
+    semanticsProvider = semanticsProvider,                 // primary-ctor param is in scope in initializers
+    viewBuilderAction = { hasTestTag(SomeScreenTestTags.LAZY_LIST) },   // the LazyColumn's OWN tag
+    itemTypeBuilder = { itemType(::LazyListItemNode) },
+    positionMatcher = { position -> SemanticsMatcher.expectValue(LazyListItemPositionSemantics, position) },
+)
+
+@OptIn(ExperimentalTestApi::class)
+fun tokenWithTitle(title: String): LazyListItemNode =
+    tokensList.childWith<LazyListItemNode> {
+        hasTestTag(SomeScreenTestTags.LAZY_LIST_ITEM)
+        hasText(title)
+        useUnmergedTree = true
+    }
+```
+
+Non-obvious points that bite:
+
+- **`childWith` searches the MERGED tree** (it scopes via the list's `viewBuilderAction`, whose
+  `useUnmergedTree` defaults to `false`). So match the item by `hasText(title)` — on a `MergeDescendants`
+  item the child texts aggregate onto the item node. `hasAnyDescendant(withText(...))` does **not** match
+  there. (`useUnmergedTree = true` on the item matcher is inert for the scroll/filter but harmless; keep
+  it to mirror existing page objects.)
+- **The list needs its OWN `testTag` on the `LazyColumn`.** If production tags only the *items* (e.g.
+  `MARKETS_TOKENS_LIST_ITEM`) and not the container, add a tag to the `LazyColumn` modifier in the
+  production composable. Reuse the screen's existing `…TestTags.LAZY_LIST` constant when one fits.
+- **Scope to the right list when several coexist.** Multiple LazyColumns with the same *item* tag can be
+  composed at once (e.g. the Add-Funds `ChooseTokenScreen` list AND the main-screen markets sheet, both
+  using `MARKETS_TOKENS_LIST_ITEM`). A bare top-level `child { hasTestTag(ITEM); … }` is then ambiguous
+  and may match the wrong screen. `childWith` (and `tokensList.child { … }`) scope through the container
+  tag via `onNode(LAZY_LIST)` / `hasAnyAncestor(LAZY_LIST)`, so they pick the intended list. Prefer a
+  unique container tag over hoping the item text is unique.
+- **`childWith` returns a `LazyListItemNode`, not a `KNode`.** `clickWithAssertion()` was a `KNode`
+  extension; it's been generalized to `fun BaseNode<*>.clickWithAssertion()` (in
+  `common/extensions/KNode.kt`) so it works on both. Both types extend `BaseNode`, and
+  `assertIsDisplayed()`/`performClick()` live on `BaseNode`.
+- `positionMatcher` is only used by `childAt(index)` / `hasLazyListItemPosition`. For `childWith`
+  (match-by-content) the items don't need to expose `LazyListItemPositionSemantics` — pass the matcher
+  anyway since the constructor requires it.
+
+Reference: `AddFundsBottomSheetPageObject.trendingTokenWithTitle` and `MainScreenPageObject` (`lazyList`).
+
 ## Decompose model lifecycle vs. data refresh
 
 Models (e.g. `TangemPayDetailsModel`) call data fetches from `init {}`, NOT on `ON_RESUME`. Returning

app/src/androidTest/kotlin/com/tangem/common/extensions/KNode.kt

@@ -4,9 +4,10 @@ import android.os.SystemClock
 import androidx.compose.ui.test.ComposeTimeoutException
 import androidx.compose.ui.test.hasText
 import androidx.compose.ui.test.junit4.ComposeTestRule
+import io.github.kakaocup.compose.node.core.BaseNode
 import io.github.kakaocup.compose.node.element.KNode
 
-fun KNode.clickWithAssertion() {
+fun BaseNode<*>.clickWithAssertion() {
     assertIsDisplayed()
     performClick()
 }

app/src/androidTest/kotlin/com/tangem/screens/AddFundsBottomSheetPageObject.kt

@@ -1,16 +1,21 @@
 package com.tangem.screens
 
+import androidx.compose.ui.test.ExperimentalTestApi
+import androidx.compose.ui.test.SemanticsMatcher
 import androidx.compose.ui.test.SemanticsNodeInteractionsProvider
 import com.tangem.common.BaseTestCase
+import com.tangem.common.utils.LazyListItemNode
 import com.tangem.core.ui.R
 import com.tangem.core.ui.test.BaseBottomSheetTestTags
 import com.tangem.core.ui.test.BuyTokenScreenTestTags
 import com.tangem.core.ui.test.MarketsTestTags
 import com.tangem.core.ui.test.TokenActionsTestTags
 import com.tangem.core.ui.test.TokenElementsTestTags
+import com.tangem.core.ui.utils.LazyListItemPositionSemantics
 import io.github.kakaocup.compose.node.element.ComposeScreen
 import io.github.kakaocup.compose.node.element.ComposeScreen.Companion.onComposeScreen
 import io.github.kakaocup.compose.node.element.KNode
+import io.github.kakaocup.compose.node.element.lazylist.KLazyListNode
 import io.github.kakaocup.kakao.common.utilities.getResourceString
 import androidx.compose.ui.test.hasTestTag as withTestTag
 import androidx.compose.ui.test.hasText as withText
@@ -53,11 +58,22 @@ class AddFundsBottomSheetPageObject(semanticsProvider: SemanticsNodeInteractions
         useUnmergedTree = true
     }
 
-    fun trendingTokenWithTitle(tokenTitle: String): KNode = child {
-        hasTestTag(MarketsTestTags.TOKENS_LIST_ITEM)
-        hasAnyDescendant(withText(tokenTitle))
-        useUnmergedTree = true
-    }
+    private val trendingTokensList = KLazyListNode(
+        semanticsProvider = semanticsProvider,
+        viewBuilderAction = { hasTestTag(BuyTokenScreenTestTags.LAZY_LIST) },
+        itemTypeBuilder = { itemType(::LazyListItemNode) },
+        positionMatcher = { position ->
+            SemanticsMatcher.expectValue(LazyListItemPositionSemantics, position)
+        },
+    )
+
+    @OptIn(ExperimentalTestApi::class)
+    fun trendingTokenWithTitle(tokenTitle: String): LazyListItemNode =
+        trendingTokensList.childWith<LazyListItemNode> {
+            hasTestTag(MarketsTestTags.TOKENS_LIST_ITEM)
+            hasText(tokenTitle)
+            useUnmergedTree = true
+        }
 }
 
 internal fun BaseTestCase.onAddFundsBottomSheet(function: AddFundsBottomSheetPageObject.() -> Unit) =

app/src/androidTest/kotlin/com/tangem/tests/AppCurrencyTest.kt

@@ -54,13 +54,22 @@ class AppCurrencyTest : BaseTestCase() {
             step("Click on currency '$targetCurrency'") {
                 onAppCurrencySelectorScreen { currencyItem(targetCurrency).performClick() }
             }
-            step("Press 'Back' button to return to 'Details' screen") {
+            step("Assert 'App settings' screen is open after currency selection") {
+                flakySafely(WAIT_UNTIL_TIMEOUT_LONG) {
+                    onAppSettingsScreen { currencyButton.assertIsDisplayed() }
+                }
+            }
+            step("Return to 'Details' screen") {
                 waitForIdle()
                 device.uiDevice.pressBack()
             }
-            step("Press 'Back' button to return to 'Main' screen") {
-                waitForIdle()
-                device.uiDevice.pressBack()
+            step("Return to 'Main' screen via 'Back' button") {
+                onDetailsScreen { topAppBarBackButton.clickWithAssertion() }
+            }
+            step("Assert 'Main' screen is opened") {
+                flakySafely(WAIT_UNTIL_TIMEOUT_LONG) {
+                    onMainScreen { screenContainer.assertIsDisplayed() }
+                }
             }
             step("Assert total balance contains '$targetSymbol' on 'Main' screen") {
                 // Balance re-loads in the new currency async after the switch — wait for the € equivalent.

app/src/androidTest/kotlin/com/tangem/tests/actionButtons/MainScreenActionButtonsTest.kt

@@ -501,7 +501,9 @@ class MainScreenActionButtonsTest : BaseTestCase() {
                 onMainScreen { swapButton.performClick() }
             }
             step("Check 'Action is unavailable' dialog") {
-                checkActionIsUnavailableDialog()
+                flakySafely(WAIT_UNTIL_TIMEOUT) {
+                    checkActionIsUnavailableDialog()
+                }
             }
             step("Click on 'Ok' button") {
                 onDialog { okButton.performClick() }

app/src/androidTest/kotlin/com/tangem/tests/send/warnings/StellarWarningsTest.kt

@@ -3,11 +3,13 @@ package com.tangem.tests.send.warnings
 import com.tangem.common.BaseTestCase
 import com.tangem.common.constants.TestConstants.QUOTES_API_SCENARIO
 import com.tangem.common.constants.TestConstants.USER_TOKENS_API_SCENARIO
+import com.tangem.common.constants.TestConstants.WAIT_UNTIL_TIMEOUT_LONG
 import com.tangem.common.constants.TestConstants.XLM_ACTIVATED_RECIPIENT_ADDRESS
 import com.tangem.common.constants.TestConstants.XLM_NON_ACTIVATED_RECIPIENT_ADDRESS
 import com.tangem.common.extensions.clickWithAssertion
 import com.tangem.common.utils.resetWireMockScenarioState
 import com.tangem.scenarios.checkSendWarning
+import com.tangem.scenarios.openSendConfirmScreenViaNextButton
 import com.tangem.scenarios.openSendScreen
 import com.tangem.screens.onSendAddressScreen
 import com.tangem.screens.onSendConfirmScreen
@@ -110,8 +112,10 @@ class StellarWarningsTest : BaseTestCase() {
             step("Type non activated address in input text field") {
                 onSendAddressScreen { addressTextField.performTextReplacement(XLM_NON_ACTIVATED_RECIPIENT_ADDRESS) }
             }
-            step("Click on 'Next' button") {
-                onSendAddressScreen { nextButton.clickWithAssertion() }
+            step("Open 'Send confirm' screen via 'Next' button") {
+                flakySafely(WAIT_UNTIL_TIMEOUT_LONG) {
+                    openSendConfirmScreenViaNextButton()
+                }
             }
             step("Assert 'Invalid reserve amount warning' is not displayed") {
                 checkSendWarning(

features/common-features/impl/src/main/java/com/tangem/features/commonfeatures/impl/choosetoken/ui/ChooseTokenScreen.kt

@@ -126,7 +126,8 @@ private fun Content(state: ChooseTokenFullUM, modifier: Modifier = Modifier) {
         LazyColumn(
             modifier = Modifier
                 .fillMaxSize()
-                .nestedScroll(nestedScrollConnection),
+                .nestedScroll(nestedScrollConnection)
+                .testTag(BuyTokenScreenTestTags.LAZY_LIST),
             state = lazyListState,
             contentPadding = WindowInsets.navigationBars.asPaddingValues(),
         ) {