import unittest
from utils.math_utils import add, subtract, multiply, divide


class TestMathUtils(unittest.TestCase):
    def test_add(self):
        self.assertEqual(add(1, 2), 3)

    def test_subtract(self):
        self.assertEqual(subtract(5, 3), 2)

    def test_multiply(self):
        self.assertEqual(multiply(3, 4), 12)

    def test_divide(self):
        self.assertEqual(divide(10, 2), 5)
        with self.assertRaises(ValueError):
            divide(10, 0)


if __name__ == '__main__':
    unittest.main()