Waiting for topic selection

Change-Id: I44226a7c5e693ee92eed27070c09cd4e0751e674

benchmarks/src/main/java/com/google/samples/apps/nowinandroid/foryou/ForYouActions.kt

@@ -27,8 +27,9 @@ fun MacrobenchmarkScope.forYouWaitForContent() {
     device.wait(Until.gone(By.res("forYou:loadingWheel")), 5_000)
     // Sometimes, the loading wheel is gone, but the content is not loaded yet
     // So we'll wait here for authors to be sure
-    val obj = device.findObject(By.res("forYou:authors"))
-    obj.wait(untilHasChildren(), 30_000)
+    val obj = device.findObject(By.res("forYou:topicSelection"))
+    // Timeout here is quite big, because sometimes data loading takes a long time!
+    obj.wait(untilHasChildren(), 60_000)
 }
 
 fun MacrobenchmarkScope.forYouScrollFeedDownUp() {

feature/foryou/src/main/java/com/google/samples/apps/nowinandroid/feature/foryou/ForYouScreen.kt

@@ -282,7 +282,9 @@ private fun TopicSelection(
     modifier: Modifier = Modifier
 ) = trace("TopicSelection") {
     val lazyGridState = rememberLazyGridState()
-    TrackScrollJank(scrollableState = lazyGridState, stateName = "forYou:TopicSelection")
+    val topicSelectionTestTag = "forYou:topicSelection"
+
+    TrackScrollJank(scrollableState = lazyGridState, stateName = topicSelectionTestTag)
 
     LazyHorizontalGrid(
         state = lazyGridState,
@@ -302,6 +304,7 @@ private fun TopicSelection(
             // The maximum of these two bounds is therefore a valid upper bound in all cases.
             .heightIn(max = max(240.dp, with(LocalDensity.current) { 240.sp.toDp() }))
             .fillMaxWidth()
+            .testTag(topicSelectionTestTag)
     ) {
         items(onboardingUiState.topics) {
             SingleTopicButton(