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+{
+    "python-envs.pythonProjects": []
+}
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diff --git a/tests/bun_test.py b/tests/bun_test.py
new file mode 100644
index 000000000..01f4274e4
--- /dev/null
+++ b/tests/bun_test.py
@@ -0,0 +1,30 @@
+import pytest
+from praktikum.bun import Bun
+
+class TestBun:
+
+    def test_bun_initialization_sets_name_correctly(self):
+        bun = Bun("black bun", 100)
+        assert bun.name == "black bun"
+
+    def test_bun_initialization_sets_price_correctly(self):
+        bun = Bun("black bun", 100)
+        assert bun.price == 100
+
+    def test_get_name_returns_correct_name(self):
+        bun = Bun("white bun", 200)
+        assert bun.get_name() == "white bun"
+
+    def test_get_price_returns_correct_price(self):
+        bun = Bun("red bun", 300)
+        assert bun.get_price() == 300
+
+    @pytest.mark.parametrize("name, price", [
+        ("very long name of a bun", 99.99),
+        ("", 0),
+        ("bun with special symbols %$#", -50)  
+    ])
+    def test_bun_creation_with_various_parameters(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/burger_test.py b/tests/burger_test.py
new file mode 100644
index 000000000..de6025dff
--- /dev/null
+++ b/tests/burger_test.py
@@ -0,0 +1,83 @@
+import pytest
+from unittest.mock import Mock
+from praktikum.burger import Burger
+
+
+class TestBurger:
+
+    def test_set_buns_success(self):
+        burger = Burger()
+        mock_bun = Mock()
+        
+        burger.set_buns(mock_bun)
+        
+        assert burger.bun == mock_bun
+
+    def test_add_ingredient_success(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_success(self):
+        burger = Burger()
+        mock_ingredient = Mock()
+        burger.ingredients.append(mock_ingredient) 
+        
+        burger.remove_ingredient(0)
+        
+        assert len(burger.ingredients) == 0
+
+    def test_move_ingredient_success(self):
+        burger = Burger()
+        mock_ingredient_1 = Mock()
+        mock_ingredient_2 = Mock()
+        burger.ingredients.extend([mock_ingredient_1, mock_ingredient_2])
+        
+        burger.move_ingredient(0, 1)
+        
+        assert burger.ingredients[0] == mock_ingredient_2
+        assert burger.ingredients[1] == mock_ingredient_1
+
+    @pytest.mark.parametrize("bun_price, ing_price, expected", [
+        (100, 50, 250),    
+        (200, 100, 500),  
+        (0, 0, 0)          
+    ])
+    def test_get_price_calculates_correctly(self, bun_price, ing_price, expected):
+        burger = Burger()
+        
+        mock_bun = Mock()
+        mock_bun.get_price.return_value = bun_price
+        burger.set_buns(mock_bun)
+        
+        mock_ingredient = Mock()
+        mock_ingredient.get_price.return_value = ing_price
+        burger.add_ingredient(mock_ingredient)
+        
+        assert burger.get_price() == expected
+
+    def test_get_receipt_returns_correct_string(self):
+        burger = Burger()
+        
+        mock_bun = Mock()
+        mock_bun.get_name.return_value = "black bun"
+        mock_bun.get_price.return_value = 100
+        burger.set_buns(mock_bun)
+        
+   
+        mock_ingredient = Mock()
+        mock_ingredient.get_type.return_value = "SAUCE"
+        mock_ingredient.get_name.return_value = "hot sauce"
+        mock_ingredient.get_price.return_value = 100
+        burger.add_ingredient(mock_ingredient)
+        
+        receipt = burger.get_receipt()
+        
+        assert "black bun" in receipt
+        assert "sauce" in receipt 
+        assert "hot sauce" in receipt
+        assert "300" in receipt 
\ No newline at end of file
diff --git a/tests/database_test.py b/tests/database_test.py
new file mode 100644
index 000000000..020d46e20
--- /dev/null
+++ b/tests/database_test.py
@@ -0,0 +1,19 @@
+import pytest
+from praktikum.database import Database
+
+class TestDatabase:
+
+    def test_available_buns_returns_not_empty_list(self):
+        database = Database()
+        buns = database.available_buns()
+        
+        assert len(buns) == 3
+       
+        assert buns[0].get_name() == "black bun"
+
+    def test_available_ingredients_returns_not_empty_list(self):
+        database = Database()
+        ingredients = database.available_ingredients()
+        
+        assert len(ingredients) == 6
+        assert ingredients[0].get_name() == "hot sauce"
\ No newline at end of file
diff --git a/tests/ingredient_test.py b/tests/ingredient_test.py
new file mode 100644
index 000000000..67beb031c
--- /dev/null
+++ b/tests/ingredient_test.py
@@ -0,0 +1,23 @@
+import pytest
+from praktikum.ingredient import Ingredient
+
+class TestIngredient:
+
+    def test_ingredient_initialization(self):
+        ingredient = Ingredient("SAUCE", "hot sauce", 100.0)
+        
+        assert ingredient.type == "SAUCE"
+        assert ingredient.name == "hot sauce"
+        assert ingredient.price == 100.0
+
+    def test_get_price_returns_correct_price(self):
+        ingredient = Ingredient("FILLING", "cutlet", 150.0)
+        assert ingredient.get_price() == 150.0
+
+    def test_get_name_returns_correct_name(self):
+        ingredient = Ingredient("SAUCE", "sour cream", 50.0)
+        assert ingredient.get_name() == "sour cream"
+
+    def test_get_type_returns_correct_type(self):
+        ingredient = Ingredient("FILLING", "sausage", 200.0)
+        assert ingredient.get_type() == "FILLING"
\ No newline at end of file