[fenix] Closes https://github.com/mozilla-mobile/fenix/issues/24276: fixed history tests

app/src/main/java/org/mozilla/fenix/library/history/HistoryDataSource.kt

@@ -11,8 +11,7 @@ import org.mozilla.fenix.components.history.HistoryDB
 import org.mozilla.fenix.components.history.PagedHistoryProvider
 
 class HistoryDataSource(
-    private val historyProvider: PagedHistoryProvider,
+    private val historyProvider: PagedHistoryProvider
-    private val onZeroItemsLoaded: () -> Unit
 ) : PagingSource<Int, History>() {
 
     // having any value but null creates visual glitches in case or swipe to refresh and immediate
@@ -26,9 +25,6 @@ class HistoryDataSource(
             positionWithOffset(offset)
         }
         val nextOffset = if (historyItems.isEmpty()) {
-            if (params.key == null) {
-                onZeroItemsLoaded.invoke()
-            }
             null
         } else {
             (offset + historyItems.size) + 1

app/src/main/java/org/mozilla/fenix/library/history/HistoryFragment.kt

@@ -99,7 +99,8 @@ class HistoryFragment : LibraryPageFragment<History>(), UserInteractionHandler {
         )
         _historyView = HistoryView(
             binding.historyLayout,
-            historyInteractor
+            historyInteractor,
+            onZeroItemsLoaded = { viewModel.userHasHistory.value = false }
         )
 
         return view

app/src/main/java/org/mozilla/fenix/library/history/HistoryView.kt

@@ -4,9 +4,11 @@
 
 package org.mozilla.fenix.library.history
 
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.core.view.isVisible
+import androidx.paging.LoadState
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.SimpleItemAnimator
 import mozilla.components.support.base.feature.UserInteractionHandler
@@ -21,7 +23,8 @@ import org.mozilla.fenix.theme.ThemeManager
  */
 class HistoryView(
     container: ViewGroup,
-    val interactor: HistoryInteractor
+    val interactor: HistoryInteractor,
+    val onZeroItemsLoaded: () -> Unit
 ) : LibraryPageView(container), UserInteractionHandler {
 
     val binding = ComponentHistoryBinding.inflate(
@@ -31,8 +34,20 @@ class HistoryView(
     var mode: HistoryFragmentState.Mode = HistoryFragmentState.Mode.Normal
         private set
 
-    val historyAdapter = HistoryAdapter(interactor)
+    val historyAdapter = HistoryAdapter(interactor).apply {
+        addLoadStateListener {
+            adapterItemCount = itemCount
+            Log.d("hehehaha", "adapterItemCount = $adapterItemCount")
+            if (it.source.refresh is LoadState.NotLoading &&
+                it.append.endOfPaginationReached &&
+                itemCount < 1
+            ) {
+                onZeroItemsLoaded.invoke()
+            }
+        }
+    }
     private val layoutManager = LinearLayoutManager(container.context)
+    private var adapterItemCount: Int? = null
 
     init {
         binding.historyList.apply {
@@ -61,7 +76,7 @@ class HistoryView(
 
         historyAdapter.updatePendingDeletionIds(state.pendingDeletionIds)
 
-        updateEmptyState(state.pendingDeletionIds.size != historyAdapter.itemCount)
+        updateEmptyState(state.pendingDeletionIds.size != adapterItemCount)
 
         historyAdapter.updateMode(state.mode)
         val first = layoutManager.findFirstVisibleItemPosition()

app/src/main/java/org/mozilla/fenix/library/history/HistoryViewModel.kt

@@ -13,20 +13,15 @@ import kotlinx.coroutines.flow.Flow
 import org.mozilla.fenix.components.history.PagedHistoryProvider
 
 class HistoryViewModel(historyProvider: PagedHistoryProvider) : ViewModel() {
-    var history: Flow<PagingData<History>>
     var userHasHistory = MutableLiveData(true)
-
+    var history: Flow<PagingData<History>> = Pager(
-    init {
+        PagingConfig(PAGE_SIZE),
-        history = Pager(
+        null
-            PagingConfig(PAGE_SIZE),
+    ) {
-            null
+        HistoryDataSource(
-        ) {
+            historyProvider = historyProvider
-            HistoryDataSource(
+        )
-                historyProvider = historyProvider,
+    }.flow
-                onZeroItemsLoaded = { userHasHistory.value = false }
-            )
-        }.flow
-    }
 
     companion object {
         private const val PAGE_SIZE = 25