test: add ui tests for AccountBalanceCard (#311)

test/features/account/account_balance_card_test.dart

@@ -0,0 +1,102 @@
+import 'package:didpay/features/account/account_balance_card.dart';
+import 'package:didpay/features/account/account_balance_notifier.dart';
+import 'package:didpay/features/did/did_provider.dart';
+import 'package:didpay/features/pfis/pfis_notifier.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mocktail/mocktail.dart';
+
+import '../../helpers/mocks.dart';
+import '../../helpers/test_data.dart';
+import '../../helpers/widget_helpers.dart';
+
+void main() async {
+  await TestData.initializeDids();
+
+  final accountBalance = TestData.getAccountBalance();
+  final did = TestData.aliceDid;
+  final pfis = TestData.getPfis();
+
+  late MockPfisNotifier mockPfisNotifier;
+  late MockAccountBalanceNotifier mockAccountBalanceNotifier;
+
+  group('AccountBalanceCard', () {
+    setUpAll(() {
+      registerFallbackValue(did);
+      registerFallbackValue(pfis);
+    });
+
+    setUp(() {
+      mockPfisNotifier = MockPfisNotifier(pfis);
+      mockAccountBalanceNotifier = MockAccountBalanceNotifier(accountBalance);
+
+      when(
+        () => mockAccountBalanceNotifier.startPolling(any(), any()),
+      ).thenAnswer((_) async => accountBalance);
+    });
+
+    Widget accountBalanceCardTestWidget({
+      bool pfisIsEmpty = false,
+    }) =>
+        WidgetHelpers.testableWidget(
+          child: const AccountBalanceCard(),
+          overrides: [
+            pfisProvider.overrideWith(
+              (ref) => pfisIsEmpty ? MockPfisNotifier([]) : mockPfisNotifier,
+            ),
+            accountBalanceProvider
+                .overrideWith(() => mockAccountBalanceNotifier),
+            didProvider.overrideWith((ref) => did),
+          ],
+        );
+
+    testWidgets('should show account balance title', (tester) async {
+      await tester.pumpWidget(accountBalanceCardTestWidget());
+      await tester.pumpAndSettle();
+
+      expect(find.text('Account balance'), findsOneWidget);
+    });
+
+    testWidgets('should show account balance amount', (tester) async {
+      await tester.pumpWidget(accountBalanceCardTestWidget());
+      await tester.pumpAndSettle();
+
+      expect(find.text('101'), findsOneWidget);
+      expect(find.text('USD'), findsOneWidget);
+    });
+
+    group('if pfis is empty', () {
+      testWidgets('should not show deposit button', (tester) async {
+        await tester
+            .pumpWidget(accountBalanceCardTestWidget(pfisIsEmpty: true));
+        await tester.pumpAndSettle();
+
+        expect(find.widgetWithText(FilledButton, 'Deposit'), findsNothing);
+      });
+
+      testWidgets('should not show withdraw button', (tester) async {
+        await tester
+            .pumpWidget(accountBalanceCardTestWidget(pfisIsEmpty: true));
+        await tester.pumpAndSettle();
+
+        expect(find.widgetWithText(FilledButton, 'Withdraw'), findsNothing);
+      });
+    });
+
+    group('if pfis is not empty', () {
+      testWidgets('should show deposit button', (tester) async {
+        await tester.pumpWidget(accountBalanceCardTestWidget());
+        await tester.pumpAndSettle();
+
+        expect(find.widgetWithText(FilledButton, 'Deposit'), findsOneWidget);
+      });
+
+      testWidgets('should show withdraw button', (tester) async {
+        await tester.pumpWidget(accountBalanceCardTestWidget());
+        await tester.pumpAndSettle();
+
+        expect(find.widgetWithText(FilledButton, 'Withdraw'), findsOneWidget);
+      });
+    });
+  });
+}