cpd/test/widget_testing/listview_test.dart

import 'package:cpd/database/todo_db.dart';
import 'package:cpd/widgets/edithabit_dialog.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:cpd/database/habit.dart';
import 'package:cpd/widgets/listview.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart';

void main() {
  final todoDb = TodoDB();

  setUpAll(() {
    sqfliteFfiInit();
    databaseFactory = databaseFactoryFfi;
  });

  testWidgets('MyListView displays and interacts correctly', (WidgetTester tester) async {
    final habits = [
      Habit(id: 1, title: 'Habit 1', subtitle: 'Description 1', iconCodePoint: Icons.star.codePoint,
          iconFontFamily: Icons.star.fontFamily ?? 'MaterialIcons', isComplete: false),
      Habit(id: 2, title: 'Habit 2', subtitle: 'Description 2', iconCodePoint: Icons.star_border.codePoint,
          iconFontFamily: Icons.star_border.fontFamily ?? 'MaterialIcons', isComplete: true),
    ];

    await tester.pumpWidget(MaterialApp(
      home: Scaffold(
        body: MyListView(
          habits: habits,
          todoDB: todoDb,
          fetchTodos: () {},
          updateCounter: (int count) {},
        ),
      ),
    ));

    expect(find.byType(ListView), findsOneWidget);
    expect(find.byType(ListTile), findsNWidgets(habits.length));

    for (final habit in habits) {
      expect(find.text(habit.title), findsOneWidget);
      expect(find.text(habit.subtitle), findsOneWidget);
      expect(find.byIcon(habit.icon), findsOneWidget);
    }

    final firstHabitCheckbox = find.byType(Checkbox).at(0);
    expect(firstHabitCheckbox, findsOneWidget);
    expect((tester.widget(firstHabitCheckbox) as Checkbox).value, habits[0].isComplete);

    await tester.tap(firstHabitCheckbox);
    await tester.pumpAndSettle();
    expect((tester.widget(firstHabitCheckbox) as Checkbox).value, habits[0].isComplete);

    final secondHabitCheckbox = find.byType(Checkbox).at(1);
    expect(secondHabitCheckbox, findsOneWidget);
    expect((tester.widget(secondHabitCheckbox) as Checkbox).value, habits[1].isComplete);

    await tester.tap(secondHabitCheckbox);
    await tester.pumpAndSettle();
    expect((tester.widget(secondHabitCheckbox) as Checkbox).value, habits[1].isComplete);

    final firstHabitListTile = find.byType(ListTile).at(0);
    await tester.drag(firstHabitListTile, const Offset(-500.0, 0.0));
    await tester.pumpAndSettle();
    expect(find.text("${habits[0].title} was dismissed"), findsOneWidget);

    await tester.drag(firstHabitListTile, const Offset(500.0, 0.0));
    await tester.pumpAndSettle();

    expect(find.byType(EditHabitDialog), findsOneWidget);
    
    //close the EditHabitDialog as it was already tested in edithabit_dialog_test.dart
    final cancelButtonFinder = find.widgetWithText(TextButton, 'Cancel');
    expect(cancelButtonFinder, findsOneWidget);
    await tester.tap(cancelButtonFinder);
    await tester.pumpAndSettle();
  });
}