cpd/test/unit_testing/todo_interface_test.dart

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/annotations.dart';
import 'package:mockito/mockito.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart';
import 'package:cpd/database/habit.dart';
import 'package:cpd/database/todo_interface.dart';
import 'todo_interface_test.mocks.dart';

@GenerateMocks([ToDoInterface])
void main() {
  setUpAll(() {
    sqfliteFfiInit();
    databaseFactory = databaseFactoryFfi;
  });

  group('ToDoInterface', () {
    test('fetchAll returns list of habits', () async {
      final mockToDoInterface = MockToDoInterface();

      List<Habit> mockHabits = [
        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),
        Habit(id: 3,
            title: 'Habit 3',
            subtitle: 'Description 3',
            iconCodePoint: Icons.favorite.codePoint,
            iconFontFamily: Icons.favorite.fontFamily ?? 'MaterialIcons',
            isComplete: true),
      ];

      when(mockToDoInterface.fetchAll()).thenAnswer((_) async => mockHabits);

      Future<List<Habit>> futureHabits = mockToDoInterface.fetchAll();
      List<Habit> habits = await futureHabits;

      expect(habits, isA<List<Habit>>());
      expect(habits.length, 3);
      expect(habits[0].title, 'Habit 1');
      expect(habits[1].title, 'Habit 2');
      expect(habits[2].title, 'Habit 3');
    });

    test('fetchById returns a habit when found', () async {
      final habit = Habit(id: 1, title: 'Test Habit', subtitle: 'Test Subtitle', iconCodePoint: Icons.star.codePoint,
          iconFontFamily: Icons.star.fontFamily ?? 'MaterialIcons',isComplete: false);
      final mockToDoInterface = MockToDoInterface();

      when(mockToDoInterface.fetchById(1)).thenAnswer((_) async => habit);

      Habit? fetchedHabit = await mockToDoInterface.fetchById(1);

      expect(fetchedHabit, isNotNull);
      expect(fetchedHabit!.title, 'Test Habit');
      verify(mockToDoInterface.fetchById(1)).called(1);
    });

    test('insert inserts a habit and returns its id', () async {

      final mockToDoInterface = MockToDoInterface();
      when(mockToDoInterface.insert(
          title: 'Test Habit',
          subtitle: 'Test Subtitle',
          icon: Icons.star))
          .thenAnswer((_) async => 1);

      final id = await mockToDoInterface.insert(
        title: 'Test Habit',
        subtitle: 'Test Subtitle',
        icon: Icons.star,
      );

      expect(id, 1);
      verify(mockToDoInterface.insert(
          title: 'Test Habit',
          subtitle: 'Test Subtitle',
          icon: Icons.star))
          .called(1);
    });

    test('update updates a habit and returns the number of affected rows', () async {
      final mockToDoInterface = MockToDoInterface();
      when(mockToDoInterface.update(
          id: 1, title: 'Updated Habit', subtitle: 'Updated Subtitle', icon: Icons.star))
          .thenAnswer((_) async => 1);

      final rows = await mockToDoInterface.update(
        id: 1,
        title: 'Updated Habit',
        subtitle: 'Updated Subtitle',
        icon: Icons.star,
      );

      expect(rows, 1);
      verify(mockToDoInterface.update(
          id: 1, title: 'Updated Habit', subtitle: 'Updated Subtitle', icon: Icons.star))
          .called(1);
    });

    test('delete deletes a habit', () async {
      final mockToDoInterface = MockToDoInterface();
      when(mockToDoInterface.delete(1)).thenAnswer((_) async {});

      await mockToDoInterface.delete(1);

      verify(mockToDoInterface.delete(1)).called(1);
    });

    test('updateCompletionStatus updates a habit completion status and returns the number of affected rows', () async {
      final mockToDoInterface = MockToDoInterface();
      when(mockToDoInterface.updateCompletionStatus(1, true)).thenAnswer((_) async => 1);

      final rows = await mockToDoInterface.updateCompletionStatus(1, true);

      expect(rows, 1);
      verify(mockToDoInterface.updateCompletionStatus(1, true)).called(1);
    });
  });
}