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+pytest
+pytest-cov
\ No newline at end of file
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diff --git a/tests/test_bun.py b/tests/test_bun.py
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index 000000000..c0c7424d8
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+++ b/tests/test_bun.py
@@ -0,0 +1,14 @@
+import pytest
+from praktikum.bun import Bun
+
+
+class TestBun:
+    @pytest.mark.parametrize("name, price", [
+        ("black bun", 100.0),
+        ("white bun", 200.5),
+        ("special bun", 0.0)
+    ])
+    def test_bun_init_and_getters(self, name, price):
+        bun = Bun(name, price)
+        assert bun.get_name() == name
+        assert bun.get_price() == price
\ No newline at end of file
diff --git a/tests/test_burger.py b/tests/test_burger.py
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index 000000000..24e5a710b
--- /dev/null
+++ b/tests/test_burger.py
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+from unittest.mock import Mock
+import pytest
+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 len(burger.ingredients) == 1
+        assert burger.ingredients[0] == mock_ingredient
+
+    def test_remove_ingredient(self):
+        burger = Burger()
+        mock_ing1 = Mock()
+        mock_ing2 = Mock()
+        burger.add_ingredient(mock_ing1)
+        burger.add_ingredient(mock_ing2)
+        
+        burger.remove_ingredient(0)
+        assert len(burger.ingredients) == 1
+        assert burger.ingredients[0] == mock_ing2
+
+    def test_move_ingredient(self):
+        burger = Burger()
+        mock_ing1 = Mock()
+        mock_ing2 = Mock()
+        burger.add_ingredient(mock_ing1)
+        burger.add_ingredient(mock_ing2)
+        
+        burger.move_ingredient(0, 1)
+        assert burger.ingredients == [mock_ing2, mock_ing1]
+
+    def test_get_price(self):
+        burger = Burger()
+        mock_bun = Mock()
+        mock_bun.get_price.return_value = 100.0
+        
+        mock_ing1 = Mock()
+        mock_ing1.get_price.return_value = 50.0
+        mock_ing2 = Mock()
+        mock_ing2.get_price.return_value = 30.0
+
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_ing1)
+        burger.add_ingredient(mock_ing2)
+
+        # Расчёт: 100 * 2 + 50 + 30 = 280
+        assert burger.get_price() == 280.0
+
+    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
+
+        mock_ing = Mock()
+        mock_ing.get_type.return_value = "SAUCE"
+        mock_ing.get_name.return_value = "hot sauce"
+        mock_ing.get_price.return_value = 50.0
+
+        burger.set_buns(mock_bun)
+        burger.add_ingredient(mock_ing)
+
+        expected_receipt = (
+            "(==== black bun ====)\n"
+            "= sauce hot sauce =\n"
+            "(==== black bun ====)\n\n"
+            "Price: 250.0"
+        )
+
+        assert burger.get_receipt() == expected_receipt
\ No newline at end of file
diff --git a/tests/test_database.py b/tests/test_database.py
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index 000000000..6b23dc108
--- /dev/null
+++ b/tests/test_database.py
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+from praktikum.database import Database
+
+
+class TestDatabase:
+    def test_available_buns_returns_list(self):
+        db = Database()
+        buns = db.available_buns()
+        assert len(buns) == 3
+        assert buns[0].get_name() == "black bun"
+
+    def test_available_ingredients_returns_list(self):
+        db = Database()
+        ingredients = db.available_ingredients()
+        assert len(ingredients) == 6
+        assert ingredients[0].get_name() == "hot sauce"
\ No newline at end of file
diff --git a/tests/test_ingredient.py b/tests/test_ingredient.py
new file mode 100644
index 000000000..447d89178
--- /dev/null
+++ b/tests/test_ingredient.py
@@ -0,0 +1,15 @@
+import pytest
+from praktikum.ingredient import Ingredient
+from praktikum.ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+
+
+class TestIngredient:
+    @pytest.mark.parametrize("ing_type, name, price", [
+        (INGREDIENT_TYPE_SAUCE, "hot sauce", 100.0),
+        (INGREDIENT_TYPE_FILLING, "cutlet", 100.0)
+    ])
+    def test_ingredient_getters(self, ing_type, name, price):
+        ingredient = Ingredient(ing_type, name, price)
+        assert ingredient.get_type() == ing_type
+        assert ingredient.get_name() == name
+        assert ingredient.get_price() == price
\ No newline at end of file