diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..534913ce9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.pytest_cache/
+htmlcov/
+.coverage
+__pycache__/
+*.pyc
+venv/
+.venv/
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..d19852709
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+pytest==8.1.1
+pytest-cov==4.1.0
diff --git a/tests/test_burger.py b/tests/test_burger.py
new file mode 100644
index 000000000..5d7f18e99
--- /dev/null
+++ b/tests/test_burger.py
@@ -0,0 +1,138 @@
+from unittest.mock import Mock
+import pytest
+from praktikum.burger import Burger
+from praktikum.bun import Bun  
+from praktikum.ingredient import Ingredient  
+
+
+class TestBurger:
+
+
+    def test_set_buns_adds_bun(self):
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_price.return_value = 100.0  
+        
+        burger.set_buns(mock_bun)
+        
+        assert burger.get_price() == 200.0
+
+    def test_add_ingredient_adds_to_list(self):
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_price.return_value = 0.0
+        burger.set_buns(mock_bun)
+        
+        mock_ingredient = Mock(spec=Ingredient)
+        mock_ingredient.get_price.return_value = 50.0  
+        
+        burger.add_ingredient(mock_ingredient)
+        
+        assert burger.get_price() == 50.0
+
+    def test_remove_ingredient_clears_list(self):
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_price.return_value = 0.0
+        burger.set_buns(mock_bun)
+        
+        mock_ingredient = Mock(spec=Ingredient)
+        mock_ingredient.get_price.return_value = 50.0
+        
+        burger.add_ingredient(mock_ingredient)
+        
+        burger.remove_ingredient(0)
+        
+        assert burger.get_price() == 0.0
+
+    def test_move_ingredient_swaps_positions(self):
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_name.return_value = "Булка"
+        mock_bun.get_price.return_value = 0.0
+        burger.set_buns(mock_bun)
+
+        mock_ing1 = Mock(spec=Ingredient)
+        mock_ing1.get_name.return_value = "соус"
+        mock_ing1.get_type.return_value = "SAUCE"
+        mock_ing1.get_price.return_value = 0.0
+        
+        mock_ing2 = Mock(spec=Ingredient)
+        mock_ing2.get_name.return_value = "котлета"
+        mock_ing2.get_type.return_value = "FILLING"
+        mock_ing2.get_price.return_value = 0.0
+
+        burger.add_ingredient(mock_ing1)
+        burger.add_ingredient(mock_ing2)
+        
+        burger.move_ingredient(0, 1)
+        
+        receipt = burger.get_receipt()
+        assert receipt.index("котлета") < receipt.index("соус")
+
+
+    @pytest.mark.parametrize(
+        "bun_price, ingredient_price, expected_total",
+        [
+            (100.0, 50.0, 250.0),
+            (0.0, 10.0, 10.0),
+            (250.5, 0.0, 501.0),
+            (150.0, 100.0, 400.0),
+        ],
+    )
+    def test_get_price_calculation(
+        self, bun_price, ingredient_price, expected_total
+    ):
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_price.return_value = bun_price
+        burger.set_buns(mock_bun)
+
+        mock_ingredient = Mock(spec=Ingredient)
+        mock_ingredient.get_price.return_value = ingredient_price
+        burger.add_ingredient(mock_ingredient)
+        assert burger.get_price() == expected_total
+
+    @pytest.mark.parametrize(
+        "bun_name, bun_price, ing_type, ing_name, ing_price, expected_total_price",
+        [
+            ("Краторная булка", 100.0, "SAUCE", "чили", 50.0, 250.0),
+            ("Супер булка", 100.0, "FILLING", "биг котлета", 150.0, 350.0),
+        ],
+    )
+    def test_get_receipt_formatting(
+        self, bun_name, bun_price, ing_type, ing_name, ing_price, expected_total_price
+    ):
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_name.return_value = bun_name
+        mock_bun.get_price.return_value = bun_price
+        burger.set_buns(mock_bun)
+
+        mock_ingredient = Mock(spec=Ingredient)
+        mock_ingredient.get_type.return_value = ing_type
+        mock_ingredient.get_name.return_value = ing_name
+        mock_ingredient.get_price.return_value = ing_price
+        burger.add_ingredient(mock_ingredient)
+
+        expected_receipt = (
+            f"(==== {bun_name} ====)\n"
+            f"= {ing_type.lower()} {ing_name} =\n"
+            f"(==== {bun_name} ====)\n\n"
+            f"Price: {expected_total_price}"
+        )
+        assert burger.get_receipt() == expected_receipt
+
+    def test_get_receipt_without_ingredients(self):
+        burger = Burger()
+        mock_bun = Mock(spec=Bun)
+        mock_bun.get_name.return_value = "Марсианская булка"
+        mock_bun.get_price.return_value = 100.0
+        burger.set_buns(mock_bun)
+
+        expected_receipt = (
+            f"(==== Марсианская булка ====)\n"
+            f"(==== Марсианская булка ====)\n\n"
+            f"Price: 200.0"
+        )
+        assert burger.get_receipt() == expected_receipt