135 lines
3.5 KiB
Dart
135 lines
3.5 KiB
Dart
import 'dart:async';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:kooltap/models/bar_tab.dart';
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import 'package:kooltap/models/tab_item.dart';
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import 'package:kooltap/services/bar_tab_service.dart';
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import 'package:kooltap/services/product_service.dart';
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import 'package:kooltap/viewmodels/bar_screen_view_model.dart';
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import 'package:mocktail/mocktail.dart';
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class MockBarTabService extends Mock implements BarTabService {}
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BarTab _tab(String id) {
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return BarTab(
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id: id,
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customerName: id,
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openedAt: DateTime(2026),
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items: const [],
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);
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}
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void main() {
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late MockBarTabService barTabService;
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late StreamController<List<BarTab>> openTabs;
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late BarScreenViewModel viewModel;
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setUp(() {
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barTabService = MockBarTabService();
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openTabs = StreamController<List<BarTab>>.broadcast();
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when(
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() => barTabService.watchOpenTabs(),
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).thenAnswer((_) => openTabs.stream);
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viewModel = BarScreenViewModel(barTabService: barTabService);
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});
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tearDown(() async {
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viewModel.dispose();
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await openTabs.close();
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});
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test('shows tabs from the stream and selects the first one', () async {
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viewModel.ensureLoaded();
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expect(viewModel.isLoading, true);
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openTabs.add([_tab('a'), _tab('b')]);
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await pumpEventQueue();
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expect(viewModel.isLoading, false);
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expect(viewModel.tabs.map((tab) => tab.id), ['a', 'b']);
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expect(viewModel.selectedTabId, 'a');
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});
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test('keeps the selection while that tab still exists', () async {
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viewModel.ensureLoaded();
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openTabs.add([_tab('a'), _tab('b')]);
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await pumpEventQueue();
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viewModel.selectTab('b');
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openTabs.add([_tab('c'), _tab('b')]);
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await pumpEventQueue();
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expect(viewModel.selectedTabId, 'b');
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});
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test(
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'falls back to the first tab when the selected one disappears',
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() async {
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viewModel.ensureLoaded();
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openTabs.add([_tab('a'), _tab('b')]);
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await pumpEventQueue();
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viewModel.selectTab('b');
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openTabs.add([_tab('a')]);
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await pumpEventQueue();
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expect(viewModel.selectedTabId, 'a');
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},
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);
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test('exposes a load error when the stream fails', () async {
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viewModel.ensureLoaded();
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openTabs.addError(StateError('database closed'));
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await pumpEventQueue();
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expect(viewModel.loadError, isNotNull);
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expect(viewModel.isLoading, false);
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});
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test('propagates an insufficient-stock error from the transaction', () async {
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const item = TabItem(
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id: 'item-1',
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tabId: 'tab-1',
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productId: 'prod-1',
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productName: 'Chips',
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quantity: 20,
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unitPriceInCents: 150,
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);
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when(
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() => barTabService.adjustTabItemQuantity(tabItemId: 'item-1', delta: 1),
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).thenAnswer((_) async => throw const InsufficientStockException());
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await expectLater(
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viewModel.changeItemQuantity(item, 1),
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throwsA(isA<InsufficientStockException>()),
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);
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expect(viewModel.loadError, isNull);
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});
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test('selects a newly created tab', () async {
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when(
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() => barTabService.createTab(customerName: 'New'),
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).thenAnswer((_) async => _tab('new'));
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await viewModel.createTab('New');
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expect(viewModel.selectedTabId, 'new');
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});
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test(
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'rethrows failed actions without turning them into a load error',
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() async {
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when(
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() => barTabService.deleteTab('tab-1'),
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).thenAnswer((_) async => throw StateError('boom'));
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await expectLater(viewModel.deleteTab('tab-1'), throwsStateError);
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expect(viewModel.loadError, isNull);
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},
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);
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}
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