old_contents: from django.test import TestCase
  from django.db import IntegrityError
  
  from app.timetables.models import Weekday, Meal
  
  
  class WeekdayTest(TestCase):
      """Tests the Weekday model."""
  
      def setUp(self):
          Weekday.objects.create(name='monday')
  
      def test_weekday_name_should_be_capitalized_on_save(self):
          day = Weekday.objects.get(name__iexact='monday')
  
          self.assertEqual(day.name, 'Monday')
  
      def test_duplicate_weekday_name_cannot_be_saved(self):
          day = Weekday(name='Monday')
  
          self.assertRaises(IntegrityError, day.save)
  
  
  class MealTest(TestCase):
      """Tests the Meal model."""
  
      def setUp(self):
          Meal.objects.create(
              name='breakfast', start_time='21:30:05', end_time='22:30:05'
          )
  
      def test_meal_name_should_be_capitalized_on_save(self):
          meal = Meal.objects.get(name__iexact="breakfast")
  
          self.assertEqual(meal.name, 'Breakfast')
  
      def test_duplicate_meal_name_cannot_be_saved(self):
          meal = Meal(name='Breakfast')
  
          self.assertRaises(IntegrityError, meal.save)
  
new_contents: from datetime import datetime
  
  from django.test import TestCase
  from django.db import IntegrityError
  
  from app.timetables.models import Weekday, Meal
  
  
  class WeekdayTest(TestCase):
      """Tests the Weekday model."""
  
      def setUp(self):
          Weekday.objects.create(name='monday')
  
      def test_weekday_name_should_be_capitalized_on_save(self):
          day = Weekday.objects.get(name__iexact='monday')
  
          self.assertEqual(day.name, 'Monday')
  
      def test_duplicate_weekday_name_cannot_be_saved(self):
          day = Weekday(name='Monday')
  
          self.assertRaises(IntegrityError, day.save)
  
  
  class MealTest(TestCase):
      """Tests the Meal model."""
  
      def setUp(self):
          Meal.objects.create(
              name='breakfast',
              start_time=datetime.strptime('21:30:05', '%H:%M:%S').time(),
              end_time=datetime.strptime('22:30:05', '%H:%M:%S').time()
          )
  
      def test_meal_name_should_be_capitalized_on_save(self):
          meal = Meal.objects.get(name__iexact="breakfast")
  
          self.assertEqual(meal.name, 'Breakfast')
  
      def test_duplicate_meal_name_cannot_be_saved(self):
          meal = Meal(name='Breakfast')
  
          self.assertRaises(IntegrityError, meal.save)
  
subject: Use time object for model test