Import IKAR messenger client and server

2026-10-07 22:06:07 +03:00
commit 69ea5091eb
1951 changed files with 424546 additions and 0 deletions
@@ -0,0 +1,118 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ikar/frontend/screens/chats/chat/view/anchored_message_list.dart';
+
+void main() {
+  testWidgets(
+    'a distant message can become the center without walking the list',
+    (tester) async {
+      final controller = ScrollController();
+      final anchor = ValueNotifier<int?>(null);
+      final keys = <int, GlobalKey>{};
+      addTearDown(controller.dispose);
+      addTearDown(anchor.dispose);
+
+      await tester.pumpWidget(
+        MaterialApp(
+          home: Scaffold(
+            body: SizedBox(
+              height: 300,
+              child: ValueListenableBuilder<int?>(
+                valueListenable: anchor,
+                builder: (context, index, _) => AnchoredMessageList(
+                  controller: controller,
+                  cacheExtent: 300,
+                  padding: EdgeInsets.zero,
+                  epoch: 0,
+                  itemCount: 500,
+                  anchorIndex: index,
+                  itemBuilder: (context, i) => KeyedSubtree(
+                    key: keys.putIfAbsent(i, GlobalKey.new),
+                    child: SizedBox(
+                      key: ValueKey('message-$i'),
+                      height: 60,
+                      child: Text('message $i'),
+                    ),
+                  ),
+                  bottomSpacer: const SizedBox.shrink(),
+                  loadingOlder: false,
+                  loadingIndicator: const SizedBox(height: 30),
+                ),
+              ),
+            ),
+          ),
+        ),
+      );
+      expect(find.byKey(const ValueKey('message-499')), findsOneWidget);
+      expect(find.byKey(const ValueKey('message-20')), findsNothing);
+
+      anchor.value = 20;
+      controller.jumpTo(
+        AnchoredMessageList.anchoredPixels(
+          alignment: 0.3,
+          viewport: controller.position.viewportDimension,
+          anchorHeight: 0,
+        ),
+      );
+      await tester.pump();
+
+      expect(find.byKey(const ValueKey('message-20')), findsOneWidget);
+      expect(
+        find.byKey(const ValueKey('message-20')).hitTestable(),
+        findsOneWidget,
+      );
+      expect(controller.position.pixels.isFinite, isTrue);
+      expect(controller.position.minScrollExtent, lessThan(0));
+      expect(
+        AnchoredMessageList.distanceFromBottom(controller.position),
+        greaterThan(120),
+      );
+      controller.jumpTo(controller.position.minScrollExtent);
+      await tester.pump();
+      expect(
+        AnchoredMessageList.distanceFromBottom(controller.position),
+        lessThanOrEqualTo(120),
+      );
+      anchor.value = null;
+      await tester.pump();
+      controller.jumpTo(controller.position.minScrollExtent);
+      await tester.pump();
+      expect(
+        find.byKey(const ValueKey('message-499')).hitTestable(),
+        findsOneWidget,
+      );
+      expect(tester.takeException(), isNull);
+    },
+  );
+
+  testWidgets('older loading indicator remains on the history edge', (
+    tester,
+  ) async {
+    final controller = ScrollController();
+    addTearDown(controller.dispose);
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: SizedBox(
+            height: 300,
+            child: AnchoredMessageList(
+              controller: controller,
+              cacheExtent: 300,
+              padding: EdgeInsets.zero,
+              epoch: 0,
+              itemCount: 3,
+              anchorIndex: 1,
+              itemBuilder: (context, i) =>
+                  SizedBox(height: 60, child: Text('message $i')),
+              bottomSpacer: const SizedBox.shrink(),
+              loadingOlder: true,
+              loadingIndicator: const Text('loading older'),
+            ),
+          ),
+        ),
+      ),
+    );
+    expect(find.text('loading older'), findsOneWidget);
+    expect(tester.takeException(), isNull);
+  });
+}