diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..ec51d9fd7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,78 @@
+# Виртуальные окружения
+venv/
+.venv/
+env/
+ENV/
+env.bak/
+venv.bak/
+
+# Файлы кеша Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+*.pyc
+*.pyo
+
+# Папки IDE и редакторов
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+desktop.ini
+
+# Файлы с секретами и паролями
+.env
+*.pem
+*.key
+*.crt
+*.p12
+secrets.py
+config.py
+
+# Драйверы браузеров (если случайно положили в проект)
+chromedriver.exe
+chromedriver
+geckodriver.exe
+geckodriver
+yandexdriver.exe
+yandexdriver
+msedgedriver.exe
+msedgedriver
+*.driver
+
+# Логи и временные файлы
+*.log
+*.tmp
+*.temp
+*.cache
+*.pid
+
+# Отчеты о тестах и покрытии
+htmlcov/
+.coverage
+.coverage.*
+.cache
+.pytest_cache/
+.tox/
+*.xml
+*.trx
+allure-results/
+allure-report/
+
+# Файлы сборок и дистрибутивов
+dist/
+build/
+*.egg-info/
+*.egg
+MANIFEST
+site-packages/
+target/
+
+# Файлы, создаваемые Selenium при работе
+*.screenshot
+*.har
+*.png
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
similarity index 100%
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
similarity index 100%
rename from database.py
rename to praktikum/database.py
diff --git a/ingredient.py b/praktikum/ingredient.py
similarity index 100%
rename from ingredient.py
rename to praktikum/ingredient.py
diff --git a/ingredient_types.py b/praktikum/ingredient_types.py
similarity index 100%
rename from ingredient_types.py
rename to praktikum/ingredient_types.py
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 000000000..9955deccd
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+pytest
+pytest-cov
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/bun_test.py b/tests/bun_test.py
new file mode 100644
index 000000000..4586b2c33
--- /dev/null
+++ b/tests/bun_test.py
@@ -0,0 +1,40 @@
+import pytest
+from praktikum.bun import Bun
+
+
+class TestBun:
+    
+    def test_bun_creation_name(self):
+        bun = Bun("black bun", 100)
+        assert bun.name == "black bun"
+    
+    def test_bun_creation_price(self):
+        bun = Bun("black bun", 100)
+        assert bun.price == 100
+    
+    def test_get_name(self):
+        bun = Bun("white bun", 200)
+        assert bun.get_name() == "white bun"
+    
+    def test_get_price(self):
+        bun = Bun("red bun", 300)
+        assert bun.get_price() == 300
+    
+    @pytest.mark.parametrize("name,price", [
+        ("black bun", 100),
+        ("white bun", 200),
+        ("red bun", 300.5),
+    ])
+    def test_bun_get_name_parametrized(self, name, price):
+        bun = Bun(name, price)
+        assert bun.get_name() == name
+    
+    @pytest.mark.parametrize("name,price", [
+        ("black bun", 100),
+        ("white bun", 200),
+        ("red bun", 300.5),
+    ])
+    def test_bun_get_price_parametrized(self, name, price):
+        bun = Bun(name, price)
+        assert bun.get_price() == price
+        
\ No newline at end of file
diff --git a/tests/burger_test.py b/tests/burger_test.py
new file mode 100644
index 000000000..94323e93f
--- /dev/null
+++ b/tests/burger_test.py
@@ -0,0 +1,174 @@
+import pytest
+from unittest.mock import Mock
+from praktikum.burger import Burger
+from praktikum.bun import Bun
+from praktikum.ingredient import Ingredient
+
+
+class TestBurger:
+    
+    @pytest.fixture
+    def burger(self):
+        return Burger()
+    
+    @pytest.fixture
+    def mock_bun(self):
+        bun = Mock(spec=Bun)
+        bun.get_price.return_value = 100.0
+        bun.get_name.return_value = "hot bun"
+        return bun
+    
+    @pytest.fixture
+    def mock_ingredient_sauce(self):
+        ingredient = Mock(spec=Ingredient)
+        ingredient.get_price.return_value = 50.0
+        ingredient.get_name.return_value = "hot sauce"
+        ingredient.get_type.return_value = "SAUCE"
+        return ingredient
+    
+    @pytest.fixture
+    def mock_ingredient_filling(self):
+        ingredient = Mock(spec=Ingredient)
+        ingredient.get_price.return_value = 75.0
+        ingredient.get_name.return_value = "cutlet"
+        ingredient.get_type.return_value = "FILLING"
+        return ingredient
+    
+    def test_set_buns_success(self, burger, mock_bun):
+        burger.set_buns(mock_bun)
+        assert burger.bun == mock_bun
+    
+    def test_add_ingredient_increases_count(self, burger, mock_ingredient_sauce):
+        burger.add_ingredient(mock_ingredient_sauce)
+        assert len(burger.ingredients) == 1
+    
+    def test_add_ingredient_adds_correct_ingredient(self, burger, mock_ingredient_sauce):
+        burger.add_ingredient(mock_ingredient_sauce)
+        assert burger.ingredients[0] == mock_ingredient_sauce
+    
+    def test_add_multiple_ingredients_count(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        assert len(burger.ingredients) == 2
+    
+    def test_add_multiple_ingredients_first(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        assert burger.ingredients[0] == mock_ingredient_sauce
+    
+    def test_add_multiple_ingredients_second(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        assert burger.ingredients[1] == mock_ingredient_filling
+    
+    def test_remove_ingredient_success(self, burger, mock_ingredient_sauce):
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.remove_ingredient(0)
+        assert len(burger.ingredients) == 0
+    
+    def test_remove_ingredient_middle_count(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        ingredient3 = Mock(spec=Ingredient)
+        ingredient3.get_price.return_value = 25.0
+        ingredient3.get_name.return_value = "dinosaur"
+        ingredient3.get_type.return_value = "FILLING"
+        
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        burger.add_ingredient(ingredient3)
+        
+        burger.remove_ingredient(1)
+        
+        assert len(burger.ingredients) == 2
+    
+    def test_remove_ingredient_middle_first(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        ingredient3 = Mock(spec=Ingredient)
+        ingredient3.get_price.return_value = 25.0
+        ingredient3.get_name.return_value = "dinosaur"
+        ingredient3.get_type.return_value = "FILLING"
+        
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        burger.add_ingredient(ingredient3)
+        
+        burger.remove_ingredient(1)
+        
+        assert burger.ingredients[0] == mock_ingredient_sauce
+    
+    def test_remove_ingredient_middle_last(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        ingredient3 = Mock(spec=Ingredient)
+        ingredient3.get_price.return_value = 25.0
+        ingredient3.get_name.return_value = "dinosaur"
+        ingredient3.get_type.return_value = "FILLING"
+        
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        burger.add_ingredient(ingredient3)
+        
+        burger.remove_ingredient(1)
+        
+        assert burger.ingredients[1] == ingredient3
+    
+    def test_move_ingredient_first_position(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        
+        burger.move_ingredient(0, 1)
+        
+        assert burger.ingredients[0] == mock_ingredient_filling
+    
+    def test_move_ingredient_second_position(self, burger, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        
+        burger.move_ingredient(0, 1)
+        
+        assert burger.ingredients[1] == mock_ingredient_sauce
+    
+    def test_move_ingredient_same_position(self, burger, mock_ingredient_sauce):
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.move_ingredient(0, 0)
+        assert burger.ingredients[0] == mock_ingredient_sauce
+    
+    def test_get_price_with_bun_and_ingredients(self, burger, mock_bun, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        
+        expected_price = 100.0 * 2 + 50.0 + 75.0
+        assert burger.get_price() == expected_price
+    
+    def test_get_receipt_contains_bun_name(self, burger, mock_bun, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        
+        receipt = burger.get_receipt()
+        
+        assert "(==== hot bun ====)" in receipt
+    
+    def test_get_receipt_contains_sauce(self, burger, mock_bun, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        
+        receipt = burger.get_receipt()
+        
+        assert "= sauce hot sauce =" in receipt
+    
+    def test_get_receipt_contains_filling(self, burger, mock_bun, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        
+        receipt = burger.get_receipt()
+        
+        assert "= filling cutlet =" in receipt
+    
+    def test_get_receipt_contains_price(self, burger, mock_bun, mock_ingredient_sauce, mock_ingredient_filling):
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_ingredient_sauce)
+        burger.add_ingredient(mock_ingredient_filling)
+        
+        receipt = burger.get_receipt()
+        
+        assert "Price: 325.0" in receipt
diff --git a/tests/database_test.py b/tests/database_test.py
new file mode 100644
index 000000000..6b5571fe5
--- /dev/null
+++ b/tests/database_test.py
@@ -0,0 +1,51 @@
+import pytest
+from praktikum.database import Database
+from praktikum.bun import Bun
+from praktikum.ingredient import Ingredient
+
+
+class TestDatabase:
+    
+    @pytest.fixture
+    def database(self):
+        return Database()
+    
+    def test_database_creation(self, database):
+        assert database is not None
+    
+    def test_available_buns_count(self, database):
+        buns = database.available_buns()
+        assert len(buns) == 3
+    
+    def test_available_buns_are_buns(self, database):
+        buns = database.available_buns()
+        assert all(isinstance(bun, Bun) for bun in buns)
+    
+    def test_available_buns_names(self, database):
+        buns = database.available_buns()
+        bun_names = [bun.get_name() for bun in buns]
+        assert bun_names == ["black bun", "white bun", "red bun"]
+    
+    def test_available_buns_prices(self, database):
+        buns = database.available_buns()
+        bun_prices = [bun.get_price() for bun in buns]
+        assert bun_prices == [100, 200, 300]
+    
+    def test_available_ingredients_count(self, database):
+        ingredients = database.available_ingredients()
+        assert len(ingredients) == 6
+    
+    def test_available_ingredients_are_ingredients(self, database):
+        ingredients = database.available_ingredients()
+        assert all(isinstance(ingredient, Ingredient) for ingredient in ingredients)
+    
+    def test_available_sauce_count(self, database):
+        ingredients = database.available_ingredients()
+        sauce_count = sum(1 for ing in ingredients if ing.get_type() == 'SAUCE')
+        assert sauce_count == 3
+    
+    def test_available_filling_count(self, database):
+        ingredients = database.available_ingredients()
+        filling_count = sum(1 for ing in ingredients if ing.get_type() == 'FILLING')
+        assert filling_count == 3
+        
\ No newline at end of file
diff --git a/tests/ingredient_test.py b/tests/ingredient_test.py
new file mode 100644
index 000000000..de83e04a9
--- /dev/null
+++ b/tests/ingredient_test.py
@@ -0,0 +1,65 @@
+import pytest
+from praktikum.ingredient import Ingredient
+from praktikum.ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+
+
+class TestIngredient:
+    
+    def test_ingredient_creation_type(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE, "hot sauce", 100)
+        assert ingredient.type == INGREDIENT_TYPE_SAUCE
+    
+    def test_ingredient_creation_name(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE, "hot sauce", 100)
+        assert ingredient.name == "hot sauce"
+    
+    def test_ingredient_creation_price(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE, "hot sauce", 100)
+        assert ingredient.price == 100
+    
+    def test_get_name(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_FILLING, "cutlet", 100)
+        assert ingredient.get_name() == "cutlet"
+    
+    def test_get_price(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE, "sour cream", 200)
+        assert ingredient.get_price() == 200
+    
+    def test_get_type_sauce(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE, "chili sauce", 300)
+        assert ingredient.get_type() == INGREDIENT_TYPE_SAUCE
+    
+    def test_get_type_filling(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_FILLING, "dinosaur", 200)
+        assert ingredient.get_type() == INGREDIENT_TYPE_FILLING
+    
+    @pytest.mark.parametrize("ingredient_type,name,price", [
+        (INGREDIENT_TYPE_SAUCE, "hot sauce", 100),
+        (INGREDIENT_TYPE_SAUCE, "sour cream", 200),
+        (INGREDIENT_TYPE_FILLING, "cutlet", 100),
+        (INGREDIENT_TYPE_FILLING, "dinosaur", 200),
+    ])
+    def test_ingredient_get_type_parametrized(self, ingredient_type, name, price):
+        ingredient = Ingredient(ingredient_type, name, price)
+        assert ingredient.get_type() == ingredient_type
+    
+    @pytest.mark.parametrize("ingredient_type,name,price", [
+        (INGREDIENT_TYPE_SAUCE, "hot sauce", 100),
+        (INGREDIENT_TYPE_SAUCE, "sour cream", 200),
+        (INGREDIENT_TYPE_FILLING, "cutlet", 100),
+        (INGREDIENT_TYPE_FILLING, "dinosaur", 200),
+    ])
+    def test_ingredient_get_name_parametrized(self, ingredient_type, name, price):
+        ingredient = Ingredient(ingredient_type, name, price)
+        assert ingredient.get_name() == name
+    
+    @pytest.mark.parametrize("ingredient_type,name,price", [
+        (INGREDIENT_TYPE_SAUCE, "hot sauce", 100),
+        (INGREDIENT_TYPE_SAUCE, "sour cream", 200),
+        (INGREDIENT_TYPE_FILLING, "cutlet", 100),
+        (INGREDIENT_TYPE_FILLING, "dinosaur", 200),
+    ])
+    def test_ingredient_get_price_parametrized(self, ingredient_type, name, price):
+        ingredient = Ingredient(ingredient_type, name, price)
+        assert ingredient.get_price() == price
+        
\ No newline at end of file