test(localization): add unit tests

Signed-off-by: xsahil03x <[email protected]>
2021-07-21 21:11:08 +05:30
parent 42ed729a87
commit df834f4c8b
4 changed files with 549 additions and 20 deletions
@@ -0,0 +1,109 @@
+// ignore_for_file: omit_local_variable_types
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:stream_chat_localizations/src/stream_chat_localizations.dart';
+
+void main() {
+  testWidgets('Nested Localizations', (WidgetTester tester) async {
+    await tester.pumpWidget(MaterialApp(
+      // Creates the outer Localizations widget.
+      home: ListView(
+        children: <Widget>[
+          const LocalizationTracker(key: ValueKey<String>('outer')),
+          Localizations(
+            locale: const Locale('hi'),
+            delegates: GlobalStreamChatLocalizations.delegates,
+            child: const LocalizationTracker(key: ValueKey<String>('inner')),
+          ),
+        ],
+      ),
+    ));
+
+    final LocalizationTrackerState outerTracker = tester.state(
+        find.byKey(const ValueKey<String>('outer'), skipOffstage: false));
+    expect(outerTracker.captionFontSize, 12.0);
+    final LocalizationTrackerState innerTracker = tester.state(
+        find.byKey(const ValueKey<String>('inner'), skipOffstage: false));
+    expect(innerTracker.captionFontSize, 13.0);
+  });
+
+  testWidgets(
+    'Localizations is compatible with ChangeNotifier.dispose() called '
+    'during didChangeDependencies',
+    (WidgetTester tester) async {
+      // PageView calls ScrollPosition.dispose() during didChangeDependencies.
+      await tester.pumpWidget(MaterialApp(
+        supportedLocales: const <Locale>[
+          Locale('en', 'US'),
+          Locale('hi', 'IN'),
+        ],
+        localizationsDelegates: const [
+          DummyLocalizations.delegate,
+          GlobalStreamChatLocalizations.delegate,
+        ],
+        home: PageView(),
+      ));
+
+      await tester.binding.setLocale('hi', 'IN');
+      await tester.pump();
+      await tester.pumpWidget(Container());
+    },
+  );
+
+  testWidgets('Locale without countryCode', (WidgetTester tester) async {
+    // Regression test for https://github.com/flutter/flutter/pull/16782
+    await tester.pumpWidget(MaterialApp(
+      localizationsDelegates: const <LocalizationsDelegate<dynamic>>[
+        GlobalStreamChatLocalizations.delegate,
+      ],
+      supportedLocales: const <Locale>[
+        Locale('en', 'US'),
+        Locale('hi'),
+      ],
+      home: Container(),
+    ));
+
+    await tester.binding.setLocale('hi', '');
+    await tester.pump();
+    await tester.binding.setLocale('en', 'US');
+    await tester.pump();
+  });
+}
+
+/// A localizations delegate that does not contain any useful data, and is only
+/// used to trigger didChangeDependencies upon locale change.
+class _DummyLocalizationsDelegate
+    extends LocalizationsDelegate<DummyLocalizations> {
+  const _DummyLocalizationsDelegate();
+
+  @override
+  Future<DummyLocalizations> load(Locale locale) async => DummyLocalizations();
+
+  @override
+  bool isSupported(Locale locale) => true;
+
+  @override
+  bool shouldReload(_DummyLocalizationsDelegate old) => true;
+}
+
+class DummyLocalizations {
+  static const delegate = _DummyLocalizationsDelegate();
+}
+
+class LocalizationTracker extends StatefulWidget {
+  const LocalizationTracker({Key? key}) : super(key: key);
+
+  @override
+  State<StatefulWidget> createState() => LocalizationTrackerState();
+}
+
+class LocalizationTrackerState extends State<LocalizationTracker> {
+  late double captionFontSize;
+
+  @override
+  Widget build(BuildContext context) {
+    captionFontSize = Theme.of(context).textTheme.caption!.fontSize!;
+    return Container();
+  }
+}