implemented connectivity debouncing and refetch throttling for loadable state UI components

2026-08-01 18:16:22 +02:00
parent 32be67426c
commit 2d690736e3
7 changed files with 194 additions and 28 deletions
@@ -0,0 +1,107 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:marianum_mobile/state/app/infrastructure/loadable_state/loadable_state_indicators.dart';
+
+void main() {
+  group('shouldShowOfflineBar', () {
+    test('shows when offline with cache and not loading', () {
+      expect(
+        shouldShowOfflineBar(
+          hasContent: true,
+          loading: false,
+          connectivityKnown: true,
+          connected: false,
+        ),
+        isTrue,
+      );
+    });
+
+    test('is suppressed while loading even if offline with cache', () {
+      expect(
+        shouldShowOfflineBar(
+          hasContent: true,
+          loading: true,
+          connectivityKnown: true,
+          connected: false,
+        ),
+        isFalse,
+      );
+    });
+
+    test('is hidden without cached content', () {
+      expect(
+        shouldShowOfflineBar(
+          hasContent: false,
+          loading: false,
+          connectivityKnown: true,
+          connected: false,
+        ),
+        isFalse,
+      );
+    });
+
+    test('is hidden while connectivity is unknown', () {
+      expect(
+        shouldShowOfflineBar(
+          hasContent: true,
+          loading: false,
+          connectivityKnown: false,
+          connected: false,
+        ),
+        isFalse,
+      );
+    });
+
+    test('is hidden when connected', () {
+      expect(
+        shouldShowOfflineBar(
+          hasContent: true,
+          loading: false,
+          connectivityKnown: true,
+          connected: true,
+        ),
+        isFalse,
+      );
+    });
+  });
+
+  group('shouldRefetch', () {
+    final window = const Duration(seconds: 10);
+    final base = DateTime(2026, 1, 1, 12, 0, 0);
+
+    test('is false within the throttle window', () {
+      expect(
+        shouldRefetch(
+          base,
+          base.add(const Duration(seconds: 9)),
+          window,
+          hasReFetch: true,
+        ),
+        isFalse,
+      );
+    });
+
+    test('is true once the window has elapsed', () {
+      expect(
+        shouldRefetch(
+          base,
+          base.add(const Duration(seconds: 10)),
+          window,
+          hasReFetch: true,
+        ),
+        isTrue,
+      );
+    });
+
+    test('is false without a refetch callback', () {
+      expect(
+        shouldRefetch(
+          base,
+          base.add(const Duration(minutes: 5)),
+          window,
+          hasReFetch: false,
+        ),
+        isFalse,
+      );
+    });
+  });
+}