fix(library): retain history during active downloads

2026-08-02 17:18:36 +02:00 · 2026-07-28 18:12:55 +07:00
parent 7eb0ed2fdb
commit b2e4548204
4 changed files with 290 additions and 16 deletions
@@ -0,0 +1,76 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:spotiflac_android/screens/queue_library_refresh_policy.dart';
+import 'package:spotiflac_android/services/library_database.dart';
+
+void main() {
+  const empty = QueueLibraryCounts(
+    allTrackCount: 0,
+    albumCount: 0,
+    singleTrackCount: 0,
+  );
+  const cached = QueueLibraryCounts(
+    allTrackCount: 20,
+    albumCount: 2,
+    singleTrackCount: 3,
+  );
+  const fallback = QueueLibraryCounts(
+    allTrackCount: 15,
+    albumCount: 1,
+    singleTrackCount: 4,
+  );
+
+  test('keeps cached counts when a download refresh returns empty', () {
+    final resolved = resolveQueueLibraryCountsSnapshot(
+      current: empty,
+      cached: cached,
+      activeDownloadFallback: fallback,
+    );
+
+    expect(identical(resolved, cached), isTrue);
+  });
+
+  test('uses in-memory history when no page cache exists yet', () {
+    final resolved = resolveQueueLibraryCountsSnapshot(
+      current: empty,
+      activeDownloadFallback: fallback,
+    );
+
+    expect(identical(resolved, fallback), isTrue);
+  });
+
+  test('allows a legitimate empty refresh without an active fallback', () {
+    final resolved = resolveQueueLibraryCountsSnapshot(
+      current: empty,
+      cached: cached,
+    );
+
+    expect(identical(resolved, empty), isTrue);
+    expect(
+      shouldRetainQueueLibraryPageSnapshot(
+        currentIsEmpty: true,
+        cachedHasContent: true,
+        activeDownloadFallbackAvailable: false,
+      ),
+      isFalse,
+    );
+  });
+
+  test('retains a non-empty page only while its fallback is available', () {
+    expect(
+      shouldRetainQueueLibraryPageSnapshot(
+        currentIsEmpty: true,
+        cachedHasContent: true,
+        activeDownloadFallbackAvailable: true,
+      ),
+      isTrue,
+    );
+    expect(
+      shouldRetainQueueLibraryPageSnapshot(
+        currentIsEmpty: false,
+        cachedHasContent: true,
+        activeDownloadFallbackAvailable: true,
+      ),
+      isFalse,
+    );
+  });
+}