diff --git a/conftest.py b/conftest.py
new file mode 100644
index 000000000..078817edd
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,25 @@
+import pytest
+
+from burger import Burger
+from database import Database
+from ingredient_types import INGREDIENT_TYPE_SAUCE
+from ingredient import Ingredient
+from bun import Bun
+
+
+
+@pytest.fixture(scope="function")
+def bun():
+    return Bun("Белая булка", 100)
+
+@pytest.fixture(scope="function")
+def ingredient():
+    return Ingredient(INGREDIENT_TYPE_SAUCE, "Сыр", 50)
+
+@pytest.fixture(scope="function")
+def burger():
+    return Burger()
+
+@pytest.fixture(scope="function")
+def database():
+    return Database()
\ No newline at end of file
diff --git a/test/test_bun.py b/test/test_bun.py
new file mode 100644
index 000000000..28d93967e
--- /dev/null
+++ b/test/test_bun.py
@@ -0,0 +1,14 @@
+
+from bun import Bun
+
+
+
+class TestBun:
+
+    def test_get_name(self):
+        bun = Bun("Белая булка", 100)
+        assert bun.get_name() == "Белая булка"
+
+    def test_get_price(self):
+        bun = Bun("Белая булка", 100)
+        assert bun.get_price() == 100
\ No newline at end of file
diff --git a/test/test_burger.py b/test/test_burger.py
new file mode 100644
index 000000000..898bf0018
--- /dev/null
+++ b/test/test_burger.py
@@ -0,0 +1,75 @@
+from unittest.mock import Mock
+
+import pytest
+
+
+class TestBurger:
+    def test_burger_set_bun(self, burger):
+        bun_mock = Mock()
+        burger.set_buns(bun_mock)
+
+        assert burger.bun == bun_mock
+
+    def test_burger_add_ingredient(self, burger):
+        ingredient_mock = Mock()
+        burger.add_ingredient(ingredient_mock)
+
+        assert ingredient_mock in burger.ingredients
+
+    def test_burger_remove_ingredient(self, burger):
+        ingredient_mock = Mock()
+        burger.add_ingredient(ingredient_mock)
+        burger.remove_ingredient(0)
+
+        assert ingredient_mock not in burger.ingredients
+
+
+    @pytest.mark.parametrize("index, new_index", [
+        (0, 1),   
+        (0, 0),  
+    ])
+    def test_burger_move_ingredient(self, index, new_index, burger):
+        ingredient_mock1 = Mock()
+        ingredient_mock2 = Mock()
+        burger.add_ingredient(ingredient_mock1)
+        burger.add_ingredient(ingredient_mock2)
+        burger.move_ingredient(index, new_index)
+
+        assert burger.ingredients[new_index] == ingredient_mock1
+
+    @pytest.mark.parametrize("bun_price, ingredient_price, expected_price", [
+        (10, 5, 25),  
+        (20, 10, 50)
+    ])
+    def test_burger_get_price(self, bun_price, ingredient_price, expected_price, burger):
+        bun_mock = Mock()
+        bun_mock.get_price.return_value = bun_price
+        burger.set_buns(bun_mock)
+
+        ingredient_mock = Mock()
+        ingredient_mock.get_price.return_value = ingredient_price
+        burger.add_ingredient(ingredient_mock)
+
+        assert burger.get_price() == expected_price
+
+    def test_burger_get_receipt(self, burger):
+        bun_mock = Mock()
+        bun_mock.get_name.return_value = "Булка"
+        bun_mock.get_price.return_value = 0
+        burger.set_buns(bun_mock)
+
+        ingredient_mock = Mock()
+        ingredient_mock.get_type.return_value = "Начинка"
+        ingredient_mock.get_name.return_value = "Сыр"
+        ingredient_mock.get_price.return_value = 0
+        burger.add_ingredient(ingredient_mock)
+
+        expected_receipt = (
+            "(==== Булка ====)\n"
+            "= начинка Сыр =\n"
+            "(==== Булка ====)\n"
+            "\n"
+            "Price: 0"
+        )
+
+        assert burger.get_receipt() == expected_receipt
\ No newline at end of file
diff --git a/test/test_database.py b/test/test_database.py
new file mode 100644
index 000000000..75fb8cf2d
--- /dev/null
+++ b/test/test_database.py
@@ -0,0 +1,42 @@
+import pytest
+
+from ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+
+
+class TestDatabase:
+
+    def test_available_buns_returns_three_buns(self, database):
+        buns = database.available_buns()
+
+        assert len(buns) == 3
+
+    @pytest.mark.parametrize("index, name, price", [
+        (0, "black bun", 100),
+        (1, "white bun", 200),
+        (2, "red bun", 300),
+    ])
+    def test_available_buns_content(self, database, index, name, price):
+        bun = database.available_buns()[index]
+
+        assert bun.get_name() == name
+        assert bun.get_price() == price
+
+    def test_available_ingredients_returns_six_ingredients(self, database):
+        ingredients = database.available_ingredients()
+
+        assert len(ingredients) == 6
+
+    @pytest.mark.parametrize("index, ingredient_type, name, price", [
+        (0, INGREDIENT_TYPE_SAUCE, "hot sauce", 100),
+        (1, INGREDIENT_TYPE_SAUCE, "sour cream", 200),
+        (2, INGREDIENT_TYPE_SAUCE, "chili sauce", 300),
+        (3, INGREDIENT_TYPE_FILLING, "cutlet", 100),
+        (4, INGREDIENT_TYPE_FILLING, "dinosaur", 200),
+        (5, INGREDIENT_TYPE_FILLING, "sausage", 300),
+    ])
+    def test_available_ingredients_content(self, database, index, ingredient_type, name, price):
+        ingredient = database.available_ingredients()[index]
+
+        assert ingredient.get_type() == ingredient_type
+        assert ingredient.get_name() == name
+        assert ingredient.get_price() == price
diff --git a/test/test_ingredient.py b/test/test_ingredient.py
new file mode 100644
index 000000000..20ed80ae4
--- /dev/null
+++ b/test/test_ingredient.py
@@ -0,0 +1,21 @@
+import pytest
+
+from ingredient import Ingredient
+from ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+
+
+class TestIngredient:
+
+    @pytest.mark.parametrize("ingredient_type", [
+        INGREDIENT_TYPE_SAUCE,
+        INGREDIENT_TYPE_FILLING,
+    ])
+    def test_get_type(self, ingredient_type):
+        ingredient = Ingredient(ingredient_type, "Сыр", 50)
+        assert ingredient.get_type() == ingredient_type
+
+    def test_get_name(self, ingredient):
+        assert ingredient.get_name() == "Сыр"
+
+    def test_get_price(self, ingredient):
+        assert ingredient.get_price() == 50