diff --git a/.coverage b/.coverage
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diff --git a/.gitignore b/.gitignore
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+# игнорирую весь каталог __pycache__
+__pycache__
+
+# игнорирую весь каталог .pytest_cache
+.pytest_cache
+
+# игнорирую весь каталог .venv
+.venv
+
+# игнорирую все файлы с расширением .pyc
+*.pyc
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diff --git a/__init__.py b/praktikum/__init__.py
similarity index 100%
rename from __init__.py
rename to praktikum/__init__.py
diff --git a/bun.py b/praktikum/bun.py
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rename from bun.py
rename to praktikum/bun.py
diff --git a/burger.py b/praktikum/burger.py
similarity index 100%
rename from burger.py
rename to praktikum/burger.py
diff --git a/database.py b/praktikum/database.py
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rename from database.py
rename to praktikum/database.py
diff --git a/ingredient.py b/praktikum/ingredient.py
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rename from ingredient.py
rename to praktikum/ingredient.py
diff --git a/ingredient_types.py b/praktikum/ingredient_types.py
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rename from ingredient_types.py
rename to praktikum/ingredient_types.py
diff --git a/praktikum.py b/praktikum/praktikum.py
similarity index 100%
rename from praktikum.py
rename to praktikum/praktikum.py
diff --git a/requirements.txt b/requirements.txt
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diff --git a/test_burger.py b/test_burger.py
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+++ b/test_burger.py
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+import pytest
+from unittest.mock import Mock, patch
+from praktikum.burger import Burger
+from praktikum.bun import Bun
+from praktikum.ingredient import Ingredient
+from praktikum.ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+
+class TestBurger:
+    def test_set_buns(self):
+        """Тест установки булочки в бургер"""
+        # Arrange
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.name = "white bun"
+        mock_bun.price = 200
+        
+        # Act
+        burger.set_buns(mock_bun)
+        
+        # Assert
+        assert burger.bun == mock_bun
+    
+    def test_add_ingredient(self):
+        """Тест добавления ингредиента в бургер"""
+        # Arrange
+        burger = Burger()
+        mock_ingredient = Mock(spec=Ingredient)
+        mock_ingredient.get_type.return_value = INGREDIENT_TYPE_SAUCE
+        mock_ingredient.get_name.return_value = "hot sauce"
+        mock_ingredient.get_price.return_value = 100
+        
+        # Act
+        burger.add_ingredient(mock_ingredient)
+        
+        # Assert
+        assert len(burger.ingredients) == 1
+        assert burger.ingredients[0] == mock_ingredient
+    
+    def test_remove_ingredient(self):
+        """Тест удаления ингредиента из бургера"""
+        # Arrange
+        burger = Burger()
+        
+        # Создаем моки ингредиентов
+        mock_sauce = Mock(spec=Ingredient)
+        mock_sauce.get_type.return_value = INGREDIENT_TYPE_SAUCE
+        mock_sauce.get_name.return_value = "hot sauce"
+        
+        mock_filling = Mock(spec=Ingredient)
+        mock_filling.get_type.return_value = INGREDIENT_TYPE_FILLING
+        mock_filling.get_name.return_value = "cutlet"
+        
+        # Добавляем ингредиенты
+        burger.add_ingredient(mock_sauce)
+        burger.add_ingredient(mock_filling)
+        
+        # Act
+        burger.remove_ingredient(0)  # Удаляем первый ингредиент
+        
+        # Assert
+        assert len(burger.ingredients) == 1
+        assert burger.ingredients[0] == mock_filling
+    
+    def test_move_ingredient(self):
+        """Тест перемещения ингредиента в бургере"""
+        # Arrange
+        burger = Burger()
+        
+        # Создаем моки ингредиентов
+        mock_sauce = Mock(spec=Ingredient)
+        mock_sauce.get_type.return_value = INGREDIENT_TYPE_SAUCE
+        mock_sauce.get_name.return_value = "hot sauce"
+        
+        mock_filling = Mock(spec=Ingredient)
+        mock_filling.get_type.return_value = INGREDIENT_TYPE_FILLING
+        mock_filling.get_name.return_value = "cutlet"
+        
+        mock_another_sauce = Mock(spec=Ingredient)
+        mock_another_sauce.get_type.return_value = INGREDIENT_TYPE_SAUCE
+        mock_another_sauce.get_name.return_value = "sour cream"
+        
+        # Добавляем ингредиенты
+        burger.add_ingredient(mock_sauce)
+        burger.add_ingredient(mock_filling)
+        burger.add_ingredient(mock_another_sauce)
+        
+        # Act
+        burger.move_ingredient(0, 2)  # Перемещаем первый ингредиент в конец
+        
+        # Assert
+        assert len(burger.ingredients) == 3
+        assert burger.ingredients[0] == mock_filling
+        assert burger.ingredients[1] == mock_another_sauce
+        assert burger.ingredients[2] == mock_sauce
+    
+    def test_get_price_calculation(self):
+        """Тест расчета цены бургера"""
+        # Arrange
+        burger = Burger()
+        
+        # Моки для булочки и ингредиентов
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_price.return_value = 200
+        
+        mock_sauce = Mock(spec=Ingredient)
+        mock_sauce.get_price.return_value = 100
+        
+        mock_filling = Mock(spec=Ingredient)
+        mock_filling.get_price.return_value = 150
+        
+        # Устанавливаем компоненты
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_sauce)
+        burger.add_ingredient(mock_filling)
+        
+        # Act
+        price = burger.get_price()
+        
+        # Assert
+        expected_price = 200 * 2 + 100 + 150  # Булочка * 2 + соус + начинка
+        assert price == expected_price
+    
+    def test_get_receipt_formatting(self):
+        """Тест форматирования чека"""
+        # Arrange
+        burger = Burger()
+        
+        # Моки для булочки
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_name.return_value = "white bun"
+        
+        # Моки для ингредиентов
+        mock_sauce = Mock(spec=Ingredient)
+        mock_sauce.get_type.return_value = INGREDIENT_TYPE_SAUCE
+        mock_sauce.get_name.return_value = "hot sauce"
+        
+        mock_filling = Mock(spec=Ingredient)
+        mock_filling.get_type.return_value = INGREDIENT_TYPE_FILLING
+        mock_filling.get_name.return_value = "cutlet"
+        
+        # Устанавливаем компоненты
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_sauce)
+        burger.add_ingredient(mock_filling)
+        
+        # Настраиваем возвращаемые значения для get_price
+        mock_bun.get_price.return_value = 200
+        mock_sauce.get_price.return_value = 100
+        mock_filling.get_price.return_value = 150
+        
+        # Act
+        receipt = burger.get_receipt()
+        
+        # Assert - проверяем весь чек целиком
+        expected_receipt = (
+            "(==== white bun ====)\n"
+            "= sauce hot sauce =\n"
+            "= filling cutlet =\n"
+            "(==== white bun ====)\n"
+            "\n"
+            "Price: 650"
+        )
+        
+        assert receipt == expected_receipt
+    
+    def test_burger_with_only_bun_price(self):
+        """Тест цены бургера только с булочкой"""
+        # Arrange
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_price.return_value = 200
+        
+        burger.set_buns(mock_bun)
+        
+        # Act
+        price = burger.get_price()
+        
+        # Assert
+        assert price == 400  # 200 * 2
+    
+    def test_remove_nonexistent_ingredient(self):
+        """Тест попытки удаления несуществующего ингредиента"""
+        # Arrange
+        burger = Burger()
+        
+        # Act & Assert
+        with pytest.raises(IndexError):
+            burger.remove_ingredient(0)
+    
+    def test_move_nonexistent_ingredient(self):
+        """Тест попытки перемещения несуществующего ингредиента"""
+        # Arrange
+        burger = Burger()
+        
+        # Act & Assert
+        with pytest.raises(IndexError):
+            burger.move_ingredient(0, 1)
+    
+    def test_add_multiple_ingredients(self):
+        """Тест добавления нескольких ингредиентов"""
+        # Arrange
+        burger = Burger()
+        
+        # Создаем 5 моков ингредиентов
+        mock_ingredients = []
+        for i in range(5):
+            mock_ingredient = Mock(spec=Ingredient)
+            mock_ingredient.get_type.return_value = INGREDIENT_TYPE_SAUCE if i % 2 == 0 else INGREDIENT_TYPE_FILLING
+            mock_ingredient.get_name.return_value = f"ingredient_{i}"
+            mock_ingredients.append(mock_ingredient)
+        
+        # Act
+        for ingredient in mock_ingredients:
+            burger.add_ingredient(ingredient)
+        
+        # Assert
+        assert len(burger.ingredients) == 5
+        for i, mock_ingredient in enumerate(mock_ingredients):
+            assert burger.ingredients[i] == mock_ingredient
+    
+    @patch('praktikum.burger.Burger.get_price')
+    def test_receipt_uses_get_price(self, mock_get_price):
+        """Тест, что get_receipt использует метод get_price для расчета стоимости"""
+        # Arrange
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_name.return_value = "test bun"
+        
+        burger.set_buns(mock_bun)
+        mock_get_price.return_value = 500
+        
+        # Act
+        receipt = burger.get_receipt()
+        
+        # Assert
+        mock_get_price.assert_called_once()
+        assert "500" in receipt
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