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diff --git a/bun.py b/praktikum/bun.py
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rename to praktikum/bun.py
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rename to praktikum/burger.py
diff --git a/database.py b/praktikum/database.py
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rename to praktikum/database.py
diff --git a/ingredient.py b/praktikum/ingredient.py
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rename to praktikum/ingredient.py
diff --git a/ingredient_types.py b/praktikum/ingredient_types.py
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rename to praktikum/ingredient_types.py
diff --git a/test_burger.py b/test_burger.py
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--- /dev/null
+++ b/test_burger.py
@@ -0,0 +1,89 @@
+import pytest
+from unittest.mock import Mock
+from praktikum.burger import Burger
+
+
+class TestBurger:
+
+    def test_set_buns(self):
+        burger = Burger()
+        mock_bun = Mock()
+        burger.set_buns(mock_bun)
+        assert burger.bun == mock_bun
+
+    def test_add_ingredient(self):
+        burger = Burger()
+        mock_ingredient = Mock()
+        burger.add_ingredient(mock_ingredient)
+        assert mock_ingredient in burger.ingredients
+        assert len(burger.ingredients) == 1
+
+    def test_remove_ingredient(self):
+        burger = Burger()
+        mock_ingredient_1 = Mock()
+        mock_ingredient_2 = Mock()
+        burger.add_ingredient(mock_ingredient_1)
+        burger.add_ingredient(mock_ingredient_2)
+
+        burger.remove_ingredient(0)
+
+        assert mock_ingredient_1 not in burger.ingredients
+        assert mock_ingredient_2 in burger.ingredients
+        assert len(burger.ingredients) == 1
+
+    def test_move_ingredient(self):
+        burger = Burger()
+        mock_ingredient_1 = Mock()
+        mock_ingredient_2 = Mock()
+        burger.add_ingredient(mock_ingredient_1)
+        burger.add_ingredient(mock_ingredient_2)
+
+        burger.move_ingredient(0, 1)
+
+        assert burger.ingredients == [mock_ingredient_2, mock_ingredient_1]
+
+    @pytest.mark.parametrize(
+        "bun_price, ingredient_1_price, ingredient_2_price, expected_price",
+        [
+            (100.0, 50.0, 30.0, 280.0),
+            (0.0, 0.0, 0.0, 0.0),
+            (150.5, 99.5, 0.0, 400.5),
+        ]
+    )
+    def test_get_price(self, bun_price, ingredient_1_price, ingredient_2_price, expected_price):
+        burger = Burger()
+
+        mock_bun = Mock()
+        mock_bun.get_price.return_value = bun_price
+        burger.set_buns(mock_bun)
+
+        mock_ingredient_1 = Mock()
+        mock_ingredient_1.get_price.return_value = ingredient_1_price
+
+        mock_ingredient_2 = Mock()
+        mock_ingredient_2.get_price.return_value = ingredient_2_price
+
+        burger.add_ingredient(mock_ingredient_1)
+        burger.add_ingredient(mock_ingredient_2)
+
+        assert burger.get_price() == expected_price
+
+    def test_get_receipt(self):
+        burger = Burger()
+
+        mock_bun = Mock()
+        mock_bun.get_name.return_value = "black bun"
+        mock_bun.get_price.return_value = 100.0
+        burger.set_buns(mock_bun)
+
+        mock_ingredient = Mock()
+        mock_ingredient.get_name.return_value = "dinosaur"
+        mock_ingredient.get_type.return_value = "FILLING"
+        mock_ingredient.get_price.return_value = 200.0
+        burger.add_ingredient(mock_ingredient)
+
+        receipt = burger.get_receipt()
+
+        assert "black bun" in receipt
+        assert "dinosaur" in receipt
+        assert "400.0" in receipt
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